Top 25 Earth Related GK Questions and Answers, General Knowledge Quiz on Earth with full details
Explore the top 25 Earth related GK questions and answers with detailed explanations. A complete GK quiz guide on Earth’s geography, atmosphere, water, landforms, and natural processes.
Top 25 Earth Related GK Questions and Answers
Earth, our home planet, is the only known celestial body that sustains life. It is a fascinating mix of land, water, air, and life forms, making it unique in the solar system. From its shape and atmosphere to oceans, rivers, mountains, and deserts, Earth holds countless wonders that inspire curiosity.
Understanding the planet’s features and natural processes is not only important for general knowledge but also for appreciating the environment we live in. In this article, we bring you the Top 25 Earth Related Questions and Answers that will enhance your knowledge of geography, science, and the beauty of our planet.
Table of Contents
1. What is the shape of the Earth?
Answer: The Earth is an oblate spheroid.
Description: The Earth is not a perfect sphere but slightly flattened at the poles and bulging at the equator due to its rotation.
2. What is the Earth’s total surface area?
Answer: About 510 million square kilometers.
Description: Around 71% of this area is covered by water and 29% by land, making Earth the only known planet to support life.
3. Which layer of Earth supports life?
Answer: The biosphere.
Description: The biosphere includes land, water, and atmosphere where organisms live and interact with their environment.
4. What causes day and night on Earth?
Answer: Earth’s rotation.
Description: The Earth rotates on its axis once every 24 hours, causing alternating periods of daylight and darkness.
5. How long does Earth take to revolve around the Sun?
Answer: About 365 days and 6 hours.
Description: This revolution determines the length of a year and causes changes in seasons.
6. What is the Earth’s atmosphere composed of?
Answer: Mainly nitrogen (78%) and oxygen (21%).
Description: The atmosphere also contains carbon dioxide, argon, and trace gases that are vital for sustaining life.
7. Which is the largest ocean on Earth?
Answer: The Pacific Ocean.
Description: Covering one-third of the planet’s surface, the Pacific is the deepest and largest ocean, rich in marine biodiversity.
8. What is the Earth’s innermost layer called?
Answer: The inner core.
Description: It is composed mostly of solid iron and nickel, with extreme temperatures and pressure.
9. Which gas is essential for human survival on Earth?
Answer: Oxygen.
Description: Oxygen supports respiration, which is necessary for the survival of humans and most animals.
10. What is the Earth’s magnetic field caused by?
Answer: Movements in the liquid outer core.
Description: The Earth’s magnetic field protects the planet from harmful solar radiation and helps in navigation.
11. What percentage of Earth’s water is freshwater?
Answer: About 2.5%.
Description: Most of Earth’s freshwater is locked in glaciers and ice caps, with only a small fraction available for human use.
12. What is the Earth’s largest continent?
Answer: Asia.
Description: Asia covers one-third of Earth’s land area and is home to the majority of the world’s population.
13. What is the greenhouse effect?
Answer: Trapping of heat by greenhouse gases.
Description: This natural process keeps Earth warm, but excessive greenhouse gases cause global warming.
14. Which is the highest mountain on Earth?
Answer: Mount Everest (8,848 meters).
Description: Located in the Himalayas, it is the tallest peak above sea level and attracts climbers worldwide.
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15. Which is the longest river on Earth?
Answer: The Nile River.
Description: Stretching over 6,600 kilometers, it is vital for agriculture and human settlement in northeastern Africa.
16. What causes earthquakes?
Answer: Movement of tectonic plates.
Description: Sudden shifts in Earth’s crust release energy, causing seismic waves that shake the ground.
17. Which layer of the atmosphere protects us from UV rays?
Answer: The ozone layer.
Description: Located in the stratosphere, it absorbs harmful ultraviolet radiation from the Sun.
18. What is the Earth’s average distance from the Sun?
Answer: About 149.6 million kilometers.
Description: Known as one Astronomical Unit (AU), this distance is ideal for supporting life.
19. Which desert is the largest on Earth?
Answer: The Sahara Desert.
Description: Spanning North Africa, it covers about 9 million square kilometers with extreme heat and arid conditions.
20. What causes ocean tides?
Answer: The gravitational pull of the Moon and Sun.
Description: Tides are regular rises and falls of sea level that affect coastal ecosystems and navigation.
21. Which is the deepest ocean trench on Earth?
Answer: Mariana Trench.
Description: Located in the Pacific Ocean, it reaches a depth of about 11,000 meters below sea level.
22. What is Earth’s rotation speed at the equator?
Answer: About 1,670 km per hour.
Description: This rapid speed is not felt due to gravity and the uniform motion of the atmosphere.
23. Which planet is called Earth’s twin?
Answer: Venus.
Description: Venus is similar in size and composition but has a thick, toxic atmosphere and extreme temperatures.
24. What is soil erosion?
Answer: Removal of the top layer of soil.
Description: Caused by wind, water, and human activities, soil erosion reduces fertility and affects agriculture.
25. Why is Earth called the “Blue Planet”?
Answer: Because of its abundant water.
Description: About 71% of Earth’s surface is covered by oceans, giving it a blue appearance from space.
Conclusion
Earth is a unique planet that sustains life through its land, water, and atmosphere. From natural resources and landforms to climatic conditions and life-supporting processes, these 25 questions provide a deeper understanding of our planet. Learning about Earth not only enhances knowledge but also inspires responsibility to protect it for future generations.
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