General Knowledge Facts about Earth with solved MCQs

Today , in this article we will discuss General Knowledge Facts about Earth .

1. Earth is Not a Perfect Sphere

Earth shape is actually an oblate spheroid. This happens because Earth spins fast, so gravity pulls it in weird ways.

2. The Deepest Spot on Earth

Detail: The Mariana Trench is the deepest part of the Earth’s oceans. It’s about 36,000 feet deep.

3. Earth’s Longest Mountain Range is Underwater

Detail: The Mid-Atlantic Ridge is an underwater mountain range that’s actually longer than the Andes, Rockies, and Himalayas combined.

4. Earth is Really, Really Old

Detail: Scientists estimate that Earth is around 4.5 billion years old.

5. Earth Has a Ton of Water, but Not Much to Drink

Detail: About 71% of the Earth’s surface is water, but 97% of that is salty ocean water. Only about 2.5% is fresh water, and most of that is trapped in glaciers and polar ice caps.

6. Oxygen Levels Weren’t Always this High

Detail: A long time ago, Earth’s atmosphere had hardly any oxygen. Primitive plants had to work for millions of years to produce enough oxygen for animals like us to breathe.

7. Earth Has a Magnetic Field

Detail: Our planet has a strong magnetic field that protects us from harmful solar radiation. It’s like a big cosmic umbrella.

8. Earth’s Core is Hotter Than the Sun

Detail: The Earth’s core is incredibly hot, even hotter than the surface of the Sun. The core is what makes our planet magnetic and gives us a shield against space radiation.

9. Plate Tectonics Keep the Planet Busy

Detail: Earth’s surface is broken into tectonic plates that are always moving. This causes earthquakes, volcanic eruptions, and even creates mountains.

10. Earth Has One Natural Satellite

Detail: Our Moon is Earth’s only natural satellite. It’s also the fifth-largest moon in our Solar System and helps stabilize Earth’s rotation.

11. Earth is Actually a Busy Travel Hub

Detail: Earth is surrounded by thousands of satellites, pieces of space junk, and even a space station where astronauts live and work.

12. The Atmosphere Has Layers .

Detail: Earth’s atmosphere isn’t just a blanket of air; it has different layers. The one we live in is called the “troposphere,” and it’s where all our weather happens.

13. The Sahara Desert Helps the Amazon Rainforest

Detail: Dust from the Sahara Desert crosses the Atlantic Ocean and actually helps fertilize the Amazon Rainforest. Talk about teamwork between continents!

14. Earth is Losing Its Moon, Very Slowly

Detail: Each year, the Moon drifts about 1.5 inches away from Earth. Don’t worry, it won’t get too far during our lifetime, but it’s fascinating to think about the long-term changes.

15. More Gold in the Oceans Than You Can Imagine

: There’s an estimated 20 million tons of gold in Earth’s oceans.

16. The Earth “Rings” Like a Bell

When struck by an earthquake, certain parts of the Earth can actually oscillate, creating a ringing effect. However, this “ring” is at a frequency way too low for humans to hear.

17. Days are Getting Longer

Believe it or not, Earth’s rotation is slowing down a tiny bit. That means days are getting longer—but don’t expect to notice; we’re talking milliseconds over a lifetime.

18. Earth Houses the Biggest Living Structure

The Great Barrier Reef is the world’s biggest single structure made by living organisms. It’s so big, you can even see it from space!

19. Earth is Actually “Breathing”

Detail: Earth’s forests act like lungs, absorbing carbon dioxide and releasing oxygen. This natural process helps keep our atmosphere balanced.

20. Earth Has a Twin (Sort of)

Venus is often called Earth’s “evil twin” because it’s roughly the same size and composition as Earth. However, Venus has a super thick atmosphere that traps heat, making it a hellish place.

21. Earth’s Largest Living Organism is a Fungus

Detail: The Armillaria ostoyae fungus in Oregon’s Malheur National Forest covers over 2,385 acres and is thousands of years old. It’s the largest living organism on Earth by area.

22. The Earth has a Heartbeat

Detail: Every 26 seconds, a seismic “pulse” ripples out from a location in the Gulf of Guinea. Scientists aren’t sure why this happens, but it’s like the Earth has its own heartbeat.

23. Earth Was Once Purple

Detail: Some scientists speculate that Earth’s early plants might have been purple instead of green, due to different photosynthetic compounds. Imagine a purple landscape!

24. Our Oceans are Still Largely Unexplored

Detail: Despite all our technological advancements, about 80% of the world’s oceans remain unexplored. Who knows what mysteries lurk down there?

25. Earth’s Oldest Life Forms are Tiny

Detail: The oldest living organisms are not giant trees but tiny bacteria. Some of them are nearly 3.5 billion years old and are found in Australia.

26. Antarctica Has Lakes and Rivers

Detail: Believe it or not, beneath its frozen surface, Antarctica has lakes and rivers. Some of them have been isolated for millions of years!

27. Earth Gets Heavier Every Day

Detail: Cosmic dust falls onto Earth from space every day, making our planet about 40,000 kilograms heavier each day.

28. We’ve Moved Mountains

Detail: Human activities, especially mining and construction, have moved more soil and rock than all the world’s rivers and glaciers combined.

29. The Atmosphere Used to be Pink

Detail: The Earth’s atmosphere could have been tinged with pink billions of years ago, thanks to methane and other gases.

30. Our Planet is a Big Magnet

Detail: Earth’s magnetic field doesn’t just protect us from the Sun’s radiation; it also helps animals like birds and sea turtles navigate during migration.

MCQs on Earth Knowldege Facts :-

Question 1: Which layer of Earth is the most dense?

A) Crust
B) Mantle

C) Core

Answer: C) Core

Question 2: What percentage of Earth’s surface is covered by water?

A) 50%

B) 71%
C) 90%

Answer: B) 71%

Question 3: Which desert is the largest in the world?

A) Sahara Desert
B) Arabian Desert
C) Atacama Desert

Answer: A) Sahara Desert

Question 4: Which gas makes up most of the Earth’s atmosphere?

A) Oxygen
B) Carbon Dioxide

C) Nitrogen

Answer: C) Nitrogen

Question 5: What is the tallest mountain on Earth?

A) Mount McKinley

B) Mount Kilimanjaro
C) Mount Everest

Answer: C) Mount Everest

Question 6: What is Earth’s “sister planet”?

A) Mars
B) Venus
C) Jupiter

Answer: B) Venus

Question 7: Where is the world’s largest reef system located?

A) Caribbean Sea
B) Great Barrier Reef, Australia

C) Red Sea

Answer: B) Great Barrier Reef, Australia

Question 8: How old is Earth estimated to be?

A) 2.5 billion years

B) 4.5 billion years
C) 6.5 billion years

Answer: B) 4.5 billion years

Question 9: What is the deepest part of Earth’s ocean?

A) Bermuda Triangle
B) Mariana Trench
C) Sargasso Sea

Answer: B) Mariana Trench

Question 10: Which forest is often referred to as the “lungs of Earth”?

A) Black Forest
B) Amazon Rainforest

C) Boreal Forest

Answer: B) Amazon Rainforest

Question 11: Which is the largest ocean on Earth?

A) Atlantic Ocean
B) Indian Ocean
C) Pacific Ocean

Answer: C) Pacific Ocean

Question 12: What’s the primary cause of Earth’s seasons?

A) Distance from the Sun
B) Axial tilt

C) Ocean currents

Answer: B) Axial tilt

Question 13: Which country has the most natural lakes?

A) United States

B) Canada
C) Russia

Answer: B) Canada

Question 14: What is the smallest continent on Earth?

A) Africa
B) Antarctica
C) Australia

Answer: C) Australia

Question 15: What is the driest place on Earth?

A) Sahara Desert
B) Atacama Desert

C) Gobi Desert

Answer: B) Atacama Desert

Question 16: Which layer of Earth’s atmosphere is closest to the surface?

A) Stratosphere

B) Troposphere
C) Mesosphere

Answer: B) Troposphere

Question 17: How long does it take for Earth to complete one orbit around the Sun?

A) 365 days
B) 365.25 days
C) 364 days

Answer: B) 365.25 days

Question 18: What is the Earth’s core made up of?

A) Iron and Nickel
B) Aluminum and Silicon

C) Copper and Zinc

Answer: A) Iron and Nickel

Question 19: How much of Earth’s water is fresh water?

A) About 3%

B) About 10%
C) About 20%

Answer: A) About 3%

Question 20: Which of the following is NOT a greenhouse gas?

A) Methane
B) Nitrogen
C) Carbon Dioxide

Answer: B) Nitrogen

Question 21: Which is the longest river on Earth?

A) Amazon River

B) Nile River
C) Yangtze River

Answer: B) Nile River

Question 22: What type of rock is created by volcanic activity?

A) Sedimentary
B) Metamorphic
C) Igneous

Answer: C) Igneous

Question 23: What causes tides on Earth?

A) Wind
B) Gravitational pull of the Moon and Sun

C) Earth’s rotation

Answer: B) Gravitational pull of the Moon and Sun

Question 24: What is the second most abundant element in the Earth’s crust?

A) Iron

B) Silicon
C) Aluminum

Answer: C) Aluminum

Question 25: What is the largest living structure on Earth?

A) Amazon Rainforest
B) Great Wall of China
C) Great Barrier Reef

Answer: C) Great Barrier Reef

Question 26: What’s the highest recorded temperature on Earth?

A) 56.7°C (134°F)
B) 49.5°C (121°F)

C) 60°C (140°F)

Answer: A) 56.7°C (134°F)

Question 27: What is the greenhouse effect?

A) A process that decreases Earth’s temperature

B) A process that increases Earth’s temperature
C) A type of farming

Answer: B) A process that increases Earth’s temperature

Question 28: How many time zones does Earth have?

A) 12
B) 24
C) 36

Answer: B) 24

Question 29: What is the diameter of Earth?

A) 6,371 km
B) 12,742 km

C) 8,000 km

Answer: B) 12,742 km

Question 30: What percentage of Earth’s oxygen is produced by the Amazon Rainforest?

A) 6%

B) 20%
C) 40%

Answer: B) 20%

Question 31: What is the Earth’s only natural satellite?

A) Moon
B) Mars
C) Saturn

Answer: A) Moon

Question 32: How many continents are there on Earth?

A) 5
B) 6
C) 7

Answer: C) 7

Question 33: What is Earth mostly composed of?

A) Water
B) Rock
C) Ice

Answer: B) Rock

Question 34: What type of galaxy is Earth located in?

A) Spiral Galaxy
B) Elliptical Galaxy
C) Irregular Galaxy

Answer: A) Spiral Galaxy

Question 35: What causes the Northern and Southern Lights?

A) Light pollution
B) Solar particles colliding with Earth’s magnetic field
C) Reflection of Moonlight

Answer: B) Solar particles colliding with Earth’s magnetic field

Question 36: What is the largest planet in our solar system?

A) Earth
B) Jupiter
C) Saturn

Answer: B) Jupiter

Question 37: How many poles does Earth have?

A) 1
B) 2
C) 4

Answer: B) 2

Question 38: What is the most abundant mineral in Earth’s crust?

A) Quartz
B) Feldspar
C) Mica

Answer: B) Feldspar

Question 39: What is the capital city of Earth?

A) There is none
B) New York
C) London

Answer: A) There is none

Question 40: What is the age of the oldest rock found on Earth?

A) Around 2 billion years old
B) Around 4 billion years old
C) Around 6 billion years old

Answer: B) Around 4 billion years old

Question 41: What are the three main layers of Earth?

A) Crust, Mantle, Core
B) Troposphere, Stratosphere, Mesosphere
C) Continental, Oceanic, Galactic

Answer: A) Crust, Mantle, Core

Question 42: What is the lowest natural point on Earth’s surface?

A) Death Valley
B) Mount Everest Base
C) Dead Sea

Answer: C) Dead Sea

Question 43: What is the average speed of Earth’s rotation?

A) 1000 miles per hour
B) 1670 kilometers per hour
C) 500 miles per hour

Answer: B) 1670 kilometers per hour

Question 44: What is the name of the supercontinent that existed about 300 million years ago?

A) Pangea
B) Gondwana
C) Laurasia

Answer: A) Pangea

Question 45: How much of Earth’s water is salt water?

A) About 97%
B) About 50%
C) About 80%

Answer: A) About 97%

Question 46: What phenomenon causes the “ring of fire” around the Pacific Ocean?

A) Tectonic plate boundaries
B) High levels of volcanic activity
C) Meteor impacts

Answer: A) Tectonic plate boundaries

Question 47: What is the primary reason for Earth’s magnetic field?

A) The presence of large iron deposits
B) The rotation of its liquid outer core
C) Solar wind

Answer: B) The rotation of its liquid outer core

Question 48: How far is Earth from the Sun on average?

A) 93 million miles
B) 50 million miles
C) 150 million miles

Answer: A) 93 million miles

Question 49: What is the most common gas in Earth’s crust?

A) Oxygen
B) Nitrogen
C) Carbon Dioxide

Answer: A) Oxygen

Question 50: What is the most abundant element in Earth’s core?

A) Iron
B) Nickel
C) Gold

Answer: A) Iron

Question 51: What is the Earth’s average distance from the Moon?

A) 238,855 miles
B) 93,000 miles
C) 12,742 kilometers

Answer: A) 238,855 miles

Question 52: What is the deepest part of Earth’s ocean?

A) Marianas Trench
B) Challenger Deep
C) Puerto Rico Trench

Answer: B) Challenger Deep

Question 53: Which part of Earth is known as the “lungs of the Earth”?

A) Sahara Desert
B) Amazon Rainforest
C) Arctic Tundra

Answer: B) Amazon Rainforest

Question 54: How many major tectonic plates are there on Earth?

A) 7
B) 12
C) 20

Answer: A) 7

Question 55: What is the biggest desert on Earth?

A) Sahara
B) Gobi
C) Antarctica

Answer: C) Antarctica

Question 56: How long does it take for the Earth to rotate once on its axis?

A) 24 hours
B) 12 hours
C) 1 hour

Answer: A) 24 hours

Question 57: What is the primary gas in Earth’s atmosphere?

A) Oxygen
B) Carbon Dioxide
C) Nitrogen

Answer: C) Nitrogen

Question 58: What is the current human population on Earth approximately?

A) 5 billion
B) 8 billion
C) 10 billion

Answer: B) 8 billion

Question 59: What is the name of the Earth’s sister planet?

A) Mars
B) Venus
C) Jupiter

Answer: B) Venus

Question 60: What is Earth’s axial tilt?

A) 15.5 degrees
B) 23.5 degrees
C) 35.5 degrees

Answer: B) 23.5 degrees

Question 61: Which planet is known as Earth’s “evil twin”?

A) Mars
B) Venus
C) Saturn

Answer: B) Venus

Question 62: What do we call the phenomenon where the Sun doesn’t set for an extended period in polar regions?

A) Midnight Sun
B) Polar Vortex
C) Solar Flare

Answer: A) Midnight Sun

Question 63: What percentage of Earth is covered by water?

A) 50%
B) 71%
C) 80%

Answer: B) 71%

Question 64: What’s the name of the Earth’s outermost layer?

A) Mantle
B) Core
C) Crust

Answer: C) Crust

Question 65: What is the term for the supercontinent that scientists predict will form in the future?

A) Neo-Pangea
B) Nextlandia
C) Futura

Answer: A) Neo-Pangea

Question 66: How long does it take for Earth to complete an orbit around the Sun?

A) 365.25 days
B) 300 days
C) 400 days

Answer: A) 365.25 days

Question 67: What is the main reason for seasons on Earth?

A) Earth’s distance from the Sun
B) Earth’s axial tilt
C) The Moon’s gravitational pull

Answer: B) Earth’s axial tilt

Question 68: What causes earthquakes?

A) Movement of tectonic plates
B) Cosmic radiation
C) Rapid temperature changes

Answer: A) Movement of tectonic plates

Question 69: What is the second largest ocean on Earth?

A) Atlantic
B) Indian
C) Arctic

Answer: A) Atlantic

Question 70: What is the name for the current geological epoch that we live in?

A) Mesozoic
B) Holocene
C) Anthropocene

Answer: B) Holocene

Question 71: What is the Earth’s circumference approximately?

A) 20,000 miles
B) 25,000 miles
C) 40,000 kilometers

Answer: C) 40,000 kilometers

Question 72: Which is the longest river on Earth?

A) Nile
B) Amazon
C) Yangtze

Answer: A) Nile

Question 73: How many moons does Earth have?

A) One
B) Two
C) None

Answer: A) One

Question 74: What is the largest living structure on Earth?

A) Amazon Rainforest
B) Great Barrier Reef
C) Mount Everest

Answer: B) Great Barrier Reef

Question 75: What type of rock is the most common on Earth’s surface?

A) Igneous
B) Sedimentary
C) Metamorphic

Answer: B) Sedimentary

Question 76: Which of the following is NOT a layer of Earth’s atmosphere?

A) Stratosphere
B) Biosphere
C) Mesosphere

Answer: B) Biosphere

Question 77: What is the largest mammal on Earth?

A) Elephant
B) Blue Whale
C) Giraffe

Answer: B) Blue Whale

Question 78: Which ocean is the smallest?

A) Pacific
B) Atlantic
C) Arctic

Answer: C) Arctic

Question 79: What is the Earth’s average temperature?

A) 59°F (15°C)
B) 72°F (22°C)
C) 98.6°F (37°C)

Answer: A) 59°F (15°C)

Question 80: How much of Earth’s surface is uninhabited by humans?

A) 20%
B) 40%
C) 80%

Answer: C) 80%

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