Introduction to Gk Questions
- 1 Introduction to Gk Questions
- 2 GK Questions and Answers Class 7 – Sports
- 2.1 Types of Sports
- 2.2 SUMMER OLYMPICS
- 2.3 Gymnastics
- 3 GK Questions for class 4
- 4 GK Quiz Questions for Class 1 -Art and Painting
- 5 GK Questions for Class 2 kids-Geography
- 6 GK Questions 2022 for Class 3- History
- 7 GK Questions for Class 4- Nature
- 8 GK Questions for Class 5- Earth
- 8.1 GK Quiz Questions
- 8.1.1 Rocks and minerals
- 8.1.2 Metamorphic rocks
- 8.1.3 Igneous rocks
- 8.1.4 Sedimentary rocks
- 8.1.5 Stones
- 8.1.6 Minerals
- 8.1.7 Crystals
- 8.1.8 Gemstonres
- 8.1.9 Types of gemstone
- 8.1.10 Gold
- 8.1.11 Mining
- 8.1.12 Gold rush
- 8.1.13 Panning
- 8.1.14 Modern gold mining
- 8.1.15 Currency
- 8.1.16 Jewellery
- 8.1.17 Caves
- 8.1.18 Rock formations
- 8.1.19 Cave life
- 8.1.20 Cave systems
- 8.1.21 Cave Entrances
- 8.1.22 Cave rivers
- 8.1.23 Lava tubes
- 8.1.24 The rainforest
- 8.1.25 Canopy
- 8.1.26 Plants
- 8.1.27 Insects
- 8.1.28 Reptiles
- 8.2 Amphibians
- 8.2.1 Plants and animals
- 8.2.2 Water
- 8.2.3 Plant remedies
- 8.2.4 Climate
- 8.2.5 Clouds
- 8.2.6 Drought
- 8.2.7 Rain and water
- 8.2.8 Mountains and glaciers
- 8.2.9 The zones
- 8.2.10 Greenhouse effect
- 8.2.11 Ozone hole
- 8.2.12 Dry desert
- 8.2.13 Storm cloud
- 8.2.14 Watching weather
- 8.2.15 Atmosphere
- 8.2.16 Clouds
- 8.2.17 Weather research
- 8.2.18 Measuring the weather
- 8.2.19 Rain
- 8.2.20 Rainbows
- 8.2.21 How storms form
- 8.2.22 Thunder and Lightening
- 8.2.23 Lightening damage
- 8.2.24 Ball lightening
- 8.2.25 Sandstorms and snowstorms
- 8.2.26 Storm surges
- 8.2.27 Rescue sea
- 8.2.28 Hurricanes and tornadoes
- 8.2.29 Tracking a hurricane
- 8.2.30 Hurricanes
- 8.2.31 The storm hits
- 8.2.32 Tornadoes
- 8.2.33 Storm chasing
- 8.2.34 Tornado land
- 8.2.35 Tsunamis
- 8.2.36 Waves
- 8.2.37 Mega-tsunamis
- 8.2.38 Trains
- 8.2.39 A tsunami’s journey
- 8.2.40 How tsunamis form
- 8.2.41 The aftermath
- 8.2.42 Exploring space
- 8.2.43 Laika
- 8.3 Sputnik
- 9 GK Questions for Class 6 – Solar System
General Knowledge (GK) is the basic foundation of any individual’s intellectual development. It helps us understand the world around us better and prepares us to face challenges in life with confidence.
Basic general knowledge is essential for students and adults who wish to update their knowledge on various topics. GK Questions and answers help us learn about a wide range of topics such as history, geography, science, sports, etc.
Many books and websites offer GK questions and answers for competitive exams and general knowledge quizzes. However, selecting a reliable source of information is essential to ensure that the content is accurate and up-to-date. Here we have added more than 250+ questions to help you get along with the information.
GK Questions and Answers Class 7 – Sports
There are many different sports resources available, so do some research before you start writing. Sports can be a great way to stay active and healthy, so include some information on the benefits of playing sports.
There are many different types of sports, so be sure to include information on a few of the most popular ones. Sports can be a great way to bond with friends and family, so include some information.
Types of Sports
There are many different types of sports, so it can be helpful to narrow it down to a few of the most popular ones. Here are some of the most popular sports:
Basketball: Basketball is a trendy sport, and people of all ages play it. It is a team sport that requires a lot of coordination and communication between players.
Football: Football is another popular sport, and it is also a team sport. It requires a lot of strength and stamina, and players must be very strategic to win.
Baseball: Baseball is another popular sport and is often considered America’s pastime. It is a team sport requiring a lot of hand-eye coordination.
First held in 1896, the modern Olympic Games is the biggest multi-sports event in the world. The games are watched by hundreds of millions of people on television all around the world. Thousands of athletes compete in sports as varied as shooting, high diving and fencing. Their aim is to be the best in the world and win a highly prized gold medal.
In 1913, the founder of the Olympics, Baron Pierre de Coubertin, unveiled the five-ring symbol of the Olympics.
Equestrian events were introduced in 1912 for horses and riders. Horses race in showjumping around a course of obstacles. Eventing is held over three days.
Track athletics includes all the running and racewalking events. The shortest is the 100m sprint. The longest are the 42km marathon and 50km racewalk. Runners jump over hurdles in 100m, 110m and 400m races. There are barriers to clear in the 3,000m steeplechase.
Events include mountain biking and track cycling in a velodrome. French woman Jeannie Longo-Ciprelli is famous for cycling in six Olympics.
In the 50m-long Olympic swimming pool the events range from 50m sprints to 1,500m endurance races. The US swimmer Mark Spitz won seven gold medals for swimming at the 1972 games.
Every four years, cities bid for the right to host the summer Olympics, Sydney, Australia, staged the 2000 games, Athens, Greece, the 2004 games and Beijing, China the 2008 games. In 2012, they will be held in London, UK.
Pole Vaulters use a springy pole, around 5m long, to soar through the air clear a bar. Top pole vaulters can clear over 5m. The men’s world record of 6.14m is held by Ukrainian, Sergei Bubka.
The Japanese martial art of Judo, which means ‘gentle way’, first appeared in the Olympics in 1964. Two competitors, or judokas, fight in bouts of four (women’s) or five (men’s) minutes. In 2004, Japan won eight of 16 gold medals for judo.
Gymnastics is a Sport in which people perform a series of movements that require strength, balance and flexibility. Artistic gymnasts perform moves on apparatus such as the parallel bars, rings and the pommel horse. Rhythmic gymnastics is a combination of gymnastics moves and dance.
The pommel horse has two handles on top. The gymnast (someone who performs gymnastics) carries out a series of swinging moves, before leaving the pommel horse and landing. This is called the dismount.
Get a Grip
Many gymnasts dust their hands with chalk, which help them get a strong grip on the apparatus they are using. Some also wear leather hand protectors to prevent sprains and injuries.
This event is only for male gymnasts. The athlete swings on two rings, which hand 2.75m from a mat on the floor. They need great strength to perform their moves on the rings.
In artistic gymnastics, men and judged in six events, and women in four. In 1976, Nadia Comaneci became the first to achieve the highest score of ten.
Rhythmic gymnasts have been performing in the Olympics since 1984. Their routines are performed to music, last between 60 and 120 seconds and are marked by three panes of judges.
Rhythmic gymnasts use five pieces of equipment in their routines: a pair of clubs, a ribbon, a rope, a ball and a hoop.
Invented by Friedrich Jahn, the two flexible parallel bars stand 1.75m high and between 42 and 52cm apart. They are used by male gymnasts, who swing, then perform handstands and one-arm moves on them.
Gymnasts always warm up before competing. The warm-up stretches their muscles so they perform their best, and helps prevent injuries from occurring.
GK Questions for class 4
- How many rings are there in the Olympic symbol?
- Which Olympic sport features a 5m-long springy pole?
Answer: Pole vaulting
- How often are the summer Olympic games held?
Answer: Every four years
- Do equestrian events use a horse, a bicycle or a pistol?
Answer: A horse
- Which kind of swimming race is longer: a sprint or an endurance race?
Answer: An endurance race
- Is a Marthon race 20km, 42km or 50km long ?
- What is the name of a competitor in a judo fight?
Answer: A judoka
- Which horse-based sport takes three days to complete?
- What is the name of the building in which track cyclists compete?
Answer: A velodrome
- Who set a world record of 6.14m for the pole vault?
Answer: Sergei Bubka
- What is the longest distance race in track athletics at the Olympics?
Answer: The 50km racewalk
- How many Olympics has Jeannie Longo-Ciprelli appeared at: three, four or six?
- In which sport did Mark Spitz win seven gold medals in 1972?
- How long is a steeplechase race at the Olympics?
- When was judo first included in the Olympics?
- How many lengths of the pool do swimmers in the 1,500m race have to swim?
- How much shorter is a woman’s judo bout than a man’s?
Answer: One minute
- What fraction of the total gold medals for judo did Japan win in 2004?
- When do athletes warm up?
Answer: Before competing
- What are people who perform gymnastics called?
- How many handles does a pommel horse have?
- Are rings used only by men, or by both men and women?
Answer: Only by men
- What do some athletes dust their hands with to help with their grip?
- In gymnastics, how many events do female athletes compete in?
- Did rhythmic gymnastics first appear in the Olympics in 1932, 1968 or 1984?
- How many items of equipment are there in rhythmic gymnastics?
- Was the first person to get the highest possible score in artistic gymnastics at the Olympics a man or a woman?
Answer: A woman
- What is the highest possible mark given to a competitor for one routine: 10, 15, or 20?
- What ‘H’ is a piece of rhythmic gymnastics equipment?
- What are the two hoops hanging above the ground called?
- What kind of gymnastics is performed to music?
Answer: Rhythmic gymnastics
- How many panels of judges mark rhythmic gymnastics?
- How high are the parallel bars?
Answer: 1.7 m high
- Who was the first person to get the highest possible score in artistic gymnastics at the Olympics?
Answer: Nadia Comaneci
- Who invented the parallel bars?
Answer: Friedrich Juhn
- From which gymnastics apparatus would a gymnast?
Answer: The pommel horse
GK Quiz Questions for Class 1 -Art and Painting
Art and painting have always been associated with one another. It is not surprising that the two often go hand in hand, as art is a form of expression that can communicate a wide range of emotions and thoughts. At the same time, painting is a medium that can be used to create a visual representation of those same concepts.
Despite their close relationship, art and painting have some key differences. For one, art encompasses a far more comprehensive range of mediums than painting. While painting is limited to using pigments applied to a surface, art can contain anything from sculptures and installations to performance art and video art.
In addition, paintings are typically created to be hung on a wall or displayed in some other manner. In contrast, art can be created for various purposes and may not necessarily have a physical form.
Finally, painting is often seen as a more traditional art form, while art can encompass a broader range of contemporary and experimental practices.
GK Questions for Class 2 kids-Geography
Geography studies the physical features of the Earth and its atmosphere. It includes the study of how humans have changed and are changing the face of the planet. Geographers use both scientific and artistic methods to study the Earth.
It is divided into two main branches: physical geography and human geography. Physical geography focuses on the study of the physical features of the Earth, including its land forms, climate, and natural resources.
Human geography focuses on the study of how humans have changed and are changing the face of the planet. It includes the study of settlement patterns, economic activity, and social and cultural change.
It is a vital tool for understanding the world around us. It helps us make sense of our planet’s physical and human features and how they interact. It also helps us understand the relationships between people and their environment.
Geography is essential for several reasons
– It helps us understand the world we live in
– It helps us understand the impact of humans on the environment
– It helps us understand the relationships between people and their environment
– It helps us make informed decisions about how we use and manage our natural resources
Geography is a complex and dynamic discipline that is constantly evolving. As our understanding of the world changes, so does geography. It makes it an exciting field of study.
GK Questions 2022 for Class 3- History
History has always been an essential part of human civilization. It helps us understand who we are and where we came from. It also allows us to see how our world has changed over time.
There are many different ways to study history. Some people focus on specific events, while others look at the bigger picture. Regardless of how you approach it, history is a fascinating subject that can teach us a lot about ourselves and our world.
If you’re interested in learning more about history, plenty of resources are available online. Just do not forget to complete your research and find the accurate information online or in your textbooks.
Gk Questions on Ancient Egypt
1) Which river flows through Egypt?
A) The Nile
2) What did the ancient Egyptians call their leader?
A) The Pharaoh
3) Did Egyptians believe in life after death?
4) What was made of wool or human hair?
5) What were Egyptian clothes made from?
6) What form of writing did the Egyptians use?
7) What was Papyrus made from?
8) What was usually buried with an Egyptian’s body?
A) Their Clothes and Furniture, and food and drink
9) How did the Egyptians usually decorate their coffins?
A) With a portrait of the dead person
10) What was ‘Opening the mouth’?
A) A ceremony performed by priest at a dead pharaoh’s tomb
11) What is the biggest pyramid called?
A) The Great Pyramid of Giza
12) What flower was the symbol of the Nile?
A) The Lotus
13) Which part of the body was used to measure a cubit: the leg, the foot, or the forearm?
a) The Forearm
14) How did the Egyptians transport a pharaoh’s body?
A) In a funeral boat
15) What did Egyptians use to dry the body when embalming?
16) What animal is associated with Egyptian god of kings?
A) The hawk
17) What did the priest say during a death ceremony?
A) You live again, You will live again forever
18) For how long did pharaohs rule Egypt?
A) For 3000 years
19) Who is buried in the Great Pyramid of Giza?
A) The pharaoh Cheops
GK Questions for Class 4- Nature
Nature is the world around us, including all of its plants, animals, and other things. Nature is an essential part of our lives, and we should try to enjoy it as much as possible. There are many ways to enjoy nature, such as hiking, camping, fishing, and bird watching. We can also learn a lot about nature by studying it.
Nature is the world around us, providing us with many things we need to live. Plants give us oxygen to breathe, food to eat, and shelter from the Sun and other elements. Animals provide us with companionship, food, and clothing. In addition, nature can give us a sense of peace and relaxation.
We should all try to spend time in nature for a short walk or an extended hike. It is essential to get away from the hustle and bustle of everyday life and enjoy nature’s peace. There are many different ways to enjoy nature, so find what works best for you and get out there and enjoy it.
For GK Questions and Answers on Nature visit below links:
GK Questions for Class 5- Earth
Earth is the third planet from the Sun and the densest and fifth-largest of the eight planets in the Solar System.
It is also the largest of the Solar System’s four terrestrial planets.
It is sometimes referred to as the world or the Blue Planet. The English proper name Earth developed from Middle English Terre, Old English geborgenness, and began (“to cover, to save”). Terry is an obsolete spelling of the word.
At its center, Earth has a solid iron core, a rocky mantle, and a thin outer shell of gases, including nitrogen, oxygen, and argon. This layer is sometimes divided into the thermosphere, mesosphere, stratosphere, and exosphere. Earth’s outermost layer is the hydrosphere, consisting of oceans, ice, clouds, and water vapor.
Earth rotates on an axis tilted 23.5° from the plane of its orbit around the Sun. This tilt gives rise to Earth’s seasons, which are caused by the varying amount of sunlight falling on different parts of the planet as it orbits.
Earth’s axis of rotation is not perpendicular to its orbital plane (the so-called obliquity of the ecliptic) but tilted about 1.5°. As a result, during a year, the Northern and Southern Hemispheres are alternately exposed to more or less sunlight, causing the seasons.
The mean distance from Earth to the center of the Sun is 149.6 million kilometers (92.4 million miles), making one astronomical unit (AU) equal to about 150 million kilometers (93 million miles). Thus, the distance from Earth to the Moon is about a quarter of an AU, or 362,400 kilometers (225,700 miles).
GK Questions for Kids Volcanoes and Earthquakes
The Earth’s crust is in constant motion. volcanoes and earthquakes arise as sections of crust (‘plates’) push together or pull apart. Volcanoes and earthquakes are more common in certain parts of the world. By monitoring ground vibrations (‘seismic activity’), scientists can sometimes predict a massive earthquake or volcanic eruption and warn people.
The solid surface layer of the Earth is known as the crust, and ranges from 5km to 80km in thickness. Beneath the crust is the mantle, which is 2,900 km thick and made up of molten rock. The centre of the Earth the core, is mostly made of iron. It has a liquid outer core and a solid inner core, and is around 4,500 C hot.
Volcanoes form when molten rock is pushed up through the crust. When subduction occurs, the oceanic plate melts underground, creating a vast supply of molten rock. The rock is then released as lava in a volcanic eruption.
When plates move apart, ridges form. Often volcanoes occur there as molten rock moves up from the mantle to fill the gaps.
When continental and oceanic plates move towards each other, the oceanic plate often slides underneath the thicker continental plate-this is called subduction.
Earthquakes are most common where two plates meet, such as under Japan. Most earthquakes are mild, but some can destroy buildings. Special scientists called seismologists can measure the strength of earthquakes, using the Richter Scale.
Earthquakes are the result of frictional forces as two plates move side by side. The plates judder as they slide past each other, and each judder causes an earthquake.
GK Quiz Questions
- Is the surface of the Earth made of solid or liquid rock?
Ans: Solid Rock
- What is another name for the Earth’s surface : the skin, crust or coat?
Ans: The Crust
- RUIN POET can be rearranged to give what word for a volcano exploding?
- A seismologist is a kind of earthquake. True or false?
Ans: False (a seismologist is a scientist who studies earthquakes)
- What ‘R is the scale used to measure the strength of earthquakes?
Ans Continental plates
- Which are thicker: continental plates or oceanic plates?
Ans: Continental plates
- Are most earthquakes strong enough to destroy buildings?
- How thick is the earth’s mantle : 290 km or 2,900 km?
Ans: 2900 km
- Do ridges form where plates move together or where they move apart?
Ans: Where they move apart
- Earthquakes are common where plates slide past one another. True or false?
- Japan is situated where two plates meet. True or false?
- What ‘L’ is the molten rock released by a volcanic eruption?
- What ‘F’ is the force produced by plates sliding past each other?
- CUBOID NUTS can be rearranged to give the name of which kind of plate movement?
- Volcanoes may occur where two plates are moving apart. True or False?
- What is the most common substance in the Earth’s core?
- Which makes up a greater proportion of the Earth: the Crust or mantle?
Ans: The mantle
- On which plate do volcanoes occur when an oceanic plate and a continental plate meet?
Ans: On the continental plate
Rocks and minerals
Rocks are the building blocks of Earth’s crust, and the substances of which they are composed are called minerals. The appearance and qualities of a rock are determined by the way it was formed. Humans use rocks and minerals to make everything from jewellery to houses.
The three main types of rock are metamorphic, sedimentary and igneous. Metamorphic rocks such as marble form underground, when existing rock is exposed to great pressure or heat.
The Giant’s Causeway in Northern Ireland is made up of hexagonal (six-sided) columns of basalt, an igneous rock. Like all igneous rocks, it formed from volcanic magma (melted rock), which erupted and then cooled down.
These rocks form from sediments such as sand and mud at the bottoms of seas, lakes and rivers, building up over long periods of time Gradually, the weight of water compresses them into rock. Sedimentary rocks form in strata (Layers).
A stone is a small piece of rock, and a pebble is a stone that has had its edges smoothed over time by the action of water. the hardest stones are those from igneous rocks such as granite, or from metamorphic rocks such as slate.
There are two types of mineral: those with crystaline structures, and naturally occurring metals such as gold. These metals are elements – they cannot be broken down into any simpler substance.
Crystalline minerals form in underground rocks under great heat or pressure. Crystals have flat sides and can be extremely beautiful.
Some crystalline minerals are known as gemstones. They are precious or semiprecious stones that can be cut and polished to make gems, which are used in jewellery. The rarest ones are considered the most valuable.
Types of gemstone
The most famous and expensive gemstone is diamond. It is unusual in being a crystal made from a single element – carbon. Other very rare and precious gemstones include emeralds, which are green, rubies, which are red, and sapphires, which are blue.
Pure Gold is an orangey-yellow metal that forms underground in layers called lodes, or veins. Its purity is measured in carats, and pure gold is 24 carats. Because gold is soft, it is usually mixed with another metal. This mixture, called an alloy, becomes a paler yellow, raddish or white.
Mines are sunk to dig up ore (rocks containing gold). Most 19th-century prospectors (searchers) looked for gold that was carried to the surface by underground rivers or volcanic lava flows. They washed gravel from river beds in sluice boxes, which trapped gold pieces called nuggets.
In the 19th century, gold deposits were found in North America, Australia and South Africa. Men rushed to these places to ‘stake a claim’. A famous gold rush began in 1848 in California, USA.
Some miners put river mud in a shallow metal pan filled with water and swirled it around. Sand and pebbles were washed away, but the heavier gold sank to the bottom. Panning collected gold nuggets, flakes and tiny particles of gold dust.
Modern gold mining
Today, miners blast and drill tunnels into rock to find veins of gold ore. The ore is refined to separate the gold from the rock. South Africa is the world’s largest gold producer. The largest gold mine is in West Papua, Indonesia.
Gold has been used as money for 4,000 years. Merchants paid for goods with gold bars called ingots as part of their reserve of money.
Gold is valued for its yellow colour and shine. Goldsmiths make jewellery from gold. Because gold is a soft metal, they can beat it into many shapes and draw it out into thin wire.
GK Questions with Answers – Rocks and Minerals
- Emeralds are purple. True or False?
- What colour are rubies?
- Gold is a metal True or false?
- How many sides does a hexagon have: three or six?
- TEARING can be rearranged to give the name of what igneous rock, often used for building?
- Crystals form underground. True or false?
- Do sedimentary rocks form on the bottoms of seas, lakes and rivers or deep within the earth?
Ans: On the bottoms of seas, lakes and rivers
- What word is used for rocks which form under great pressure or heat: metamorphic, mathematic or metaphysical?
- Is basalt an igneous or a sedimentary rock?
- Gems are cut and polished to make gemstones. True or false?
- What ‘C’ is the substance from which diamond is formed?
- Which are the most valuable: diamonds, emeralds or garnets?
- HIS PAPER can be rearranged to give the name of what valuable gemstone?
- A START can be rearranged to give what word for layers of rock?
- In which country is the Giant’s Causeway?
- What ‘M’ is molten rock, which cools to form igneous rocks?
- What is the name for a stone which has had its edges worn smooth by the action of water?
Ans: A pebble
- What ‘E’ cannot be broken down into any simpler substance?
Ans: An element
Some Caves are hollow spades along the botton of cliffs, carved out by waves. Others form underground when rainwater eats away soft limestone rock. In many caves there are beautiful columns and pinnacles, mineral deposits, lakes and rivers.
Rainwater drips into underground caves. The drips contain dissolved limestone (calcite), which slowly hardens. It forms stalactites, which hang like icicles from the cave roof. Some drips fall to the floor. They harden and grow upwards, forming spires that are called stalagmites.
Fungi are organisms that do not need light to survive. They grow in caves where there is moisture and nutrients. Fungi provide food for bacteria and insects. Spiders, bats, salamanders and fish also live in caves.
Beyond the cave entrance is the twilight zone. There, bats may roost in the roof and cockroaches, worms and bacteria live on their droppings. Deeper inside is the dark zone, where the temperature is always about 13 C.
Bears and snow leopards may shelter from harsh weather in a cave entrance. If the entrance gets sunlight and rain, ferns and mosses grow there. They provide food for insects and other small animals. Swallows and swillows and swift lets build their nests on high ledges.
Rivers form below ground after rain sinks through rock that has cracks and holes, such as limestone. The rain seeps down until it reaches impermeable, or watertight, rock. A river forms and flows towards the sea, carving out tunnels and caves.
These tunnels form in lava from a volcano. Lava flowing in a channel down a volcano’s side may cool and harden on the outside, but it remains molten soft underneath. In time, the soft lava drains or flows away, leaving a long cave inside a hard outer crust.
Dont miss: The Sun
Tropical rainforest is the richest of all natural habitats. Mor eanimals and plants live here than anywhere else on earth. The rainforest is well named – in most places it rains every day. The mixture of water and warmth is what makes this habitat so full of life.
The canopy is like the roof of the rainforest, formed by the branches of the tallest trees. most rainforest animals live here, eating leaves, flowers and fruit, or one another Really tall tree, called emergents, rise above the top of the canopy.
Rainforest trees are themselves cloaked with other plants. Climbers such as vines and strangler figs grip their trunks, while ferns and bromeliads grow in their branches. Plants growing on other plants in this way are called epiphytes.
Rainforest insects include the world’s largest moth – the Atlas moth, which lives in the rainforests of southeast Asia.
Reptiles are cold-blooded animals, which thrive in the warmth of tropical rainforests. Snakes such as boas and pythons hunt prey in the branches, while gecko lizards scuttle up and down the trunks, gripping with flattened toes, which act a bit like suction pads.
The dampness of the rainforest suits slimy skinned amphibians such as the poison dart frog of South America. This type of frog has enough poison in its skin to kill a person.
Almost all of the world’s largest rivers flow through rainforests. Among them is the largest river of all, the Amazon. This massive waterway drains much of the continent of South America. Near its mouth in Brazil, the Amazon river is more than 300km wide.
Plants and animals
Rainforest plants use animals in unusual ways. Pitcher plants lure insects into their ‘pitchers’ with droplets of nectar. They then digest the insects as food. The rafflesia has the world’s largest flower – Im wide. It smells of rotten meat to attract flies to polinate it.
Plants have adapted in different ways to the daily downpours of the rainforests. Many have shiny leaves with downward pointing tips to channel water away. Some, growing in branches, have trailing roots to gather rain running off the trees.
Many medicines were first discovered in rainforest plants. Quinine, for example, is used to treat malaria. It was first taken from the bark of the cinchona tree, which grows in the South American rainforests.
The atmosphere is a protective layer of gases around the Earth. It lets in the Sun’s light and heat, but sends harmful ultraviolet (UV) rays back into space. There are different climate zones around the world. However, changes in the atmosphere are making the Earth overheat. This is making weather change.
Clouds are water vapour in the sky. High clouds such as the wispy cirrus and the puffy cumulus are seen on dry days. Grey stratus clouds that blanket the sky, and big, black, cumulonimbus thunderclouds, bring rain.
A long period when rainfall is below the usual level is called a drought, water supplies dry up and crops die. Without food and water, animals and people die. There has been a drought in the Sahel region of northern Africa since 1968.
Rain and water
Rain feeds streams, rivers and lakes. Humans use increasing amounts of water in their homes, cities, farms and industries. Many rivers and lakes have been drying up in recent years.
Mountains and glaciers
The springtime melting of mountain snow and glaciers (rivers of ice) and summer rains feed the rivers where people fish, drink and grow food because of climate change, less snow and ice falls on mountains and glaciers may melt away within 30 years.
There are five main climate zones. The polar zone is always icy. Summer in the tundra is short, so the soil never thaws, within each zone, regions have their own climate.
The atmosphere includes gases, such as carbon dioxide, that trap heat like the glass in a greenhouse. When we burn coal, oil, and gas we release more of these gases, which causes the Earth to overheat.
A 22km-high layer of zone gas around the Earth reflects ultraviolet rays back into space. The rays harm people, animals and plants. Scientists have found holes in the Ozone layer above Antarctica and over the Arctic.
About one-third of Earth’s land is desert. Deserts get less than 25 cm of rain a year. The largest is the Sahara in Northern Africa, near the Equator. The Sahara is expanding southwards into the hot, dry Sahel region.
The weather affects all of us. It makes us decide what clothes to put on in the morning and whether we go outside or stay indoors. In some places, the weather can be very hard to predict. As we learn more about our planet, however, we are gradually getting better at working out what the weather is going to do next.
As clouds, they cool and the water vapor turns into droplets. The droplets bump into each other, causing an electric charge to build up. If the charge becomes large enough, it is released as lightning.
Nowadays, satellites watch the weather from above. They help weather forecasters to see storms building up in the atmosphere. Large storms and hurricanes appear as massive swirls of cloud.
Weather occurs in the atmosphere – the layer of gases surrounding the earth. the most common gas is nitrogen, followed by oxygen, which we breathe in order to stay alive
Clouds are collections of water vapour. The vapour forms as the sun’s energy evaporates liquid water, mostly from the surface of the sea.
Scientists who study the weather are known as meteorologists. Weather balloons are just one of the tools meteorologists use to gain information about the weather. The balloons carry devices that measure weather conditions far above the ground.
Measuring the weather
There are many devices for measuring the weather. Thermometers measures temperature, while barometers measure air pressure- high pressure means fine weather, and low pressure signals storms. An anemometer measures wind speed, while a weather vane shows wind direction.
Rain falls when the droplets in clouds become too large and heavy to remain aloft. as they fall through the air, they hit other droplets and grow bigger. sometimes they freeze and fall as hail or snow.
Rainbows from when it rains on sunny days. They are the result of the light from the sun being split into its seven colors as it passes through raindrops.
Different types of storm Occur depending on the climate. Hot air at the equator rises, then colder air rushes in, causing strong winds. Across Northern Europe and the USA, rain and snowstorms occur in winter when icy air from the north pole meets warmer air from the south. The warm air chills, sinks and blows outwards as wind.
How storms form
Thunderstorms often occur in summer, when warm air rises fast from ground level into the cold atmosphere. This causes rain, wind, lightning and thunder. At any time, about 2,000 thunderstorms are happening on Earth.
Thunder and Lightening
Lightening is a huge spark of electricity made in a cloud. Cumulonimbus clouds have a positive electrical charge above and a negative charge beneath. this electricity builds up. The electricity heats the air so fast it vibrates, making thunder. Negatively charged electricity steams to the ground and a positive charge rises up to meet it, making a channel for the lightening to streak through.
As well as blowing trees apart, lightning kills about 100 people a year in USA. Tall buildings have metal lightening rods fitted to the top. They conduct, or direct, the lightning down a cable to the ground, where it won’t cause damage.
Meteorologists (weather experts) cannot explain the ball-shaped lightening that is sometimes seen. It can be as small as a golf ball or as a large as a basketball
Sandstorms and snowstorms
In a desert areas, winds blow sand into clouds 1,500m high. In cold northern regions, the wind whips snow and ice into clouds that clot out the sun. A large snowstorm with strong winds is called a blizzard.
High winds blowing across the ocean for many days can cause a storm surge. The winds whip up the waters above normal sea level and high waves hit the coast, causing flooding. This often occurs when high tides pull the seas to their highest level.
A North sea storm surge in 1953 drove waves up to 3.36m higher than normal onto the UK and Netherlands coasts. Thousands died in the floods. Hundreds more died at sea when lifeboat crews could not find in them in the storm. Today’s life boats have Global Positioning System receivers and good communications. The boats can operate in the wild weather. If a huge wave tips one over, it flips back upright.
Hurricanes and tornadoes
Hurricanes are huge whirling storms that rise over warm tropical oceans North and South of the equator tornadoes are powerful whirlwinds, faster and more violent than hurricanes meteorologists use satellites, ships, air balloons and aircraft to build a picture of hurricanes and tornadoes and broadcast warnings.
Tracking a hurricane
Weather – tracking planes are equipped with radar and probes. They fly into the eye, or centre, of hurricanes to measure the wind speed and pressure.
In the warmer months hurricanes occur when two air masses meet over an ocean with a temperature above 27 C. Warm, moist airis drawn up from the ocean in a slow, circular motion. This is caused by Earth’s spin.
The storm hits
Hurricanes can be more than 400km in diameter, with wind speeds of 120-350 Km/h. many last for several days. At sea, they can build up giant waves, causing surges that flood coasts, causing surges that flood coasts. They often grow bigger and faster as they move towards land. When they hit the coast they lift boats and trucks, rip up trees and roofs, and blow down buildings. They bring torrential rain, which can cause flooding.
The inside of huge thunderclouds called supercells are where tornadoes form. They are fed by currents of warm air that rise into the clouds from below. These currents start spinning and grow into a funnel shape, up to 1.5 km wide. As tornadoes grow, they descend and touch land or ocean.
Scientists can use doppler radar to investigate storms. Special ‘Dopplers on wheels’ (trucks with satellite dishes) are used to closely follow tornadoes and hurricanes and study them. This dangerous job is called storm chasing.
The USA has more than 1,000 tornadoes a year. Most hit Tornado Alley, between the Gulf of Mexico and the Great Lakes. Russia and East Asia also get tornadoes.
A sign that a tsunami is coming is the sea sucking back from the shore. A huge wall of water then races to the shore, growing higher and higher. The wave floods inland, causing terrible damage. The 2004 Asian Tsunami was caused by earthquakes beneath the Indian Ocean. The Pacific ocean, where 85per cent of tsunamis occur, has tsunami warning systems.
Tsunamis racing across the ocean, about Im high, are so small that ships pass over them. When they pile up at the coast, they look squarish from the side. Waves made by hurricanes will look curved.
The waves of a mega-tsunami are 40m high or more, in 1883, Krakatoa, a volcano near Java, Indonesia, erupted. Its lava chamber emptied and collapsed. The sea then rushed in, creating massive waves that killed 36,000 people.
A tsunami is really a train, or series, of waves. The waves grow only when they reach land. A rising seabed close to the coast slows the waves to about 100 km/h. They then pile up, one on top of the other. They reach an average of 3m above sea level, but they can be much higher. The sea pulls back from shore before each wave in the train surges inland.
A tsunami’s journey
An undersea earthquake pushes seawater up and out. A train of waves, about 1 m high, forms. They can race up to 700 km/h across the ocean for thousands of kilometers.
How tsunamis form
Most tsunamis occur when two parts of the Earth’s crust – tectonic plates – move below the seabed. They jolt or go under each other. Tsunamis can also be formed by huge rock slides, or asteroids falling into the sea.
Tsunamis can have a 100 m wavelength (distance between waves). They surge onto the coast every 15-60 minutes and travel up to 1 km inland. They are very destructive. In the 2004 Indian ocean tsunami, about 230,000 people were killed.
It seems strange to think that 60 years ago no one had been into space. Nowadays, an international Space Station constantly circles the Earth, manned by a crew of people from different countries. The history of space flight has happened within the lifetimes of many people alive today. It is an exciting story – and one that is far from being over.
The first living thing to enter space was Laika the dog. Lalika was launched in 1957 aboard the satellite sputnik 2, from Baikonur Cosmodrome in Kazakhstan.
Sputnik 1 was the world’s first-ever man made satellite (an object travelling around Earth). It was launched from Kazakhstan on 4 October 1957 by a group of republics called the Soviet Union.
In 1969, Neil Armstrong of the US mission Apollo 11 became the first person to walk on the Moon, with the famous words ‘That’s one small step for man, one giant leap for mankind’.
Man in space
On 12 April 1961, Yuri Gagarin became the first person ever to travel into space, aboard the spacecraft Vostock 1. A pilot from the Soviet Air Force, he travelled around the Earth for 89 minutes.
Spacesuits designed to keep people alive in space. At first, they were worn by astronauts and cosmonauts (Soviet astronauts) inside their spacecraft. Now a days, they are mainly used for operating outside in space itself – making repairs to space shuttle, for instance.
In total, Americans have made six successful missions to the Moon. The fourth, Apollo 15, carried a vehicle called a lunar rover to drive astronauts around on the surface. The last manned mission was Apollo 17, which landed on 7 December 1972. Since then, no one has visited the Moon.
Early missions into space used massive, expensive rockets, which could only be used once. On 5 January 1972, the American Government announced it was going to develop a reusable spacecraft. The result was the space shuttle, which first launched on 12 April 1981. The space shuttle program is due to end in 2011.
GK Questions for Class 6 – Solar System
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies. Of the objects in orbit around the Sun indirectly—the moons—two are larger than the smallest planet, Mercury.
The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. Most of the system’s mass is in the Sun, with most remaining mass containing Jupiter.
The four smaller inner planets, Mercury, Venus, Earth, and Mars, are terrestrial planets primarily composed of rock and metal. The four outer planets are giant, substantially more massive than the terrestrials.
Jupiter and Saturn are the two largest gas giants, while the two innermost gas giants, Uranus and Neptune, are ice giants. Pluto and Charon, the two smallest and most distant objects in the Solar System from the Sun, are considered “binary dwarf planets” because they orbit each other.
So, we come to an end. GK Questions & Answers are always valuable in each field, and it does not matter if you are preparing for a government exam or reading it all for self-knowledge. It increases your mind’s capacity to hold more and helps you become smarter than anyone else.
In this article, we have added a list of 250 questions to help you learn about Sports, History, Earth, Nature, and others in a simple short question and its answers. If there is anything else, we can help you out with. Do let us know in the comments section.