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Earth Science & Astronomy
Explore fascinating Earth Science and Astronomy GK questions and answers about our planet, the solar system, and the universe. Perfect for students, competitive exams, and GK lovers who want to expand their knowledge about space and Earth science.
Practice questions 1-25
1. What is the Earth’s only natural satellite? – Moon
2. Which is the largest planet in our solar system? – Jupiter
3. What causes tides in the ocean? – Gravitational pull of Moon and Sun
4. The Earth revolves around the Sun in how many days? – 365 days (approx.)
5. Which is the hottest planet in the solar system? – Venus
6. Which planet is known as the "Red Planet"? – Mars
7. What is the closest star to Earth? – Sun
8. What is the shape of Earth? – Oblate Spheroid
9. What is the layer of gases surrounding Earth called? – Atmosphere
10. Which gas is most abundant in Earth’s atmosphere? – Nitrogen (~78%)
11. What is the Earth’s innermost layer called? – Inner Core
12. The instrument used to measure earthquakes is called? – Seismograph
13. Which is the longest river in the world? – Nile River
14. Which is the largest ocean on Earth? – Pacific Ocean
15. Which is the highest mountain peak on Earth? – Mount Everest
16. What is the Earth’s axis tilt angle? – 23.5°
17. Which is the fastest rotating planet in the solar system? – Jupiter
18. What is the time taken by Earth to complete one rotation? – 24 hours
19. Which planet has the largest number of moons? – Saturn
20. What is the study of earthquakes called? – Seismology
21. Which galaxy contains our solar system? – Milky Way
22. Which planet is known as the "Blue Planet"? – Earth
23. What is the Earth’s average distance from the Sun? – 150 million km
24. Which is the smallest planet in the solar system? – Mercury
25. What protects the Earth from harmful UV rays of the Sun? – Ozone Layer
Practice questions 26-35
26. Which is the second largest planet in the solar system? – Saturn
27. Which is the closest planet to the Sun? – Mercury
28. Which is the brightest planet in the night sky? – Venus
29. Which planet has rings around it? – Saturn
30. Which is the coldest planet in the solar system? – Neptune
31. Which is the third planet from the Sun? – Earth
32. Which is the densest planet in the solar system? – Earth
33. Which is the smallest continent on Earth? – Australia
34. Which is the largest desert in the world? – Sahara Desert
35. Which is the deepest ocean trench
on Earth? – Mariana Trench
Practice questions 36-45
36. Which planet is farthest from the Sun? – Neptune
37. Which is the fourth planet from the Sun? – Mars
38. Which is the largest satellite in the solar system? – Ganymede (of Jupiter)
39. Which layer of the atmosphere contains the ozone layer? – Stratosphere
40. Which planet has the longest day? – Venus
41. Which planet is called the “Earth’s twin”? – Venus
42. Which is the largest volcano on Mars? – Olympus Mons
43. Which is the largest island in the world? – Greenland
44. Which is the deepest lake in the world? – Lake Baikal
45. Which is the fastest bird in the
world? – Peregrine Falcon
Practice questions 46-55
46. Which is the largest continent on Earth? – Asia
47. Which is the largest country in the world by area? – Russia
48. Which is the smallest ocean in the world? – Arctic Ocean
49. Which is the longest mountain range in the world? – Andes
50. Which is the largest hot desert in the world? – Sahara Desert
51. Which is the largest freshwater lake in the world? – Lake Superior
52. Which planet has the slowest rotation? – Venus
53. Which planet has the fastest revolution around the Sun? – Mercury
54. Which layer of the Earth lies just below the crust? – Mantle
55. Which is the brightest star
in the night sky? – Sirius
Practice questions 56-65
56. Which is the smallest planet in the Solar System? – Mercury
57. Which is the largest planet in the Solar System? – Jupiter
58. Which is the hottest planet in the Solar System? – Venus
59. Which is the coldest planet in the Solar System? – Neptune
60. Which galaxy does Earth belong to? – Milky Way
61. Which planet is known as the Earth’s twin? – Venus
62. Which is the second largest planet in the Solar System? – Saturn
63. Which planet has the longest day? – Venus
64. Which is the only natural satellite of Earth? – Moon
65. Which planet is known as
the “Red Planet”? – Mars
Important questions and their answers related to natural science.
Earth Science & Astronomy
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