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Earth
Contributed by: Millington
  • 1. What is the outermost layer of Earth called?
A) Crust
B) Inner core
C) Outer core
D) Mantle
  • 2. Which planet is closest to Earth?
A) Jupiter
B) Mars
C) Saturn
D) Venus
  • 3. What percentage of Earth's surface is covered by water?
A) 33%
B) 71%
C) 50%
D) 85%
  • 4. Which layer of the atmosphere contains the ozone layer?
A) Mesosphere
B) Thermosphere
C) Stratosphere
D) Troposphere
  • 5. What is the highest mountain on Earth?
A) Makalu
B) K2
C) Mount Everest
D) Lhotse
  • 6. Which gas makes up the majority of Earth's atmosphere?
A) Argon
B) Carbon dioxide
C) Nitrogen
D) Oxygen
  • 7. What is the process by which plants convert sunlight into energy?
A) Evaporation
B) Fermentation
C) Photosynthesis
D) Respiration
  • 8. What is the largest ocean on Earth?
A) Pacific Ocean
B) Indian Ocean
C) Atlantic Ocean
D) Southern Ocean
  • 9. Who proposed the theory of continental drift in the early 20th century?
A) Isaac Newton
B) Charles Darwin
C) Marie Curie
D) Alfred Wegener
  • 10. What is the Earth's primary source of energy?
A) The Sun
B) Fossil fuels
C) Wind energy
D) Geothermal energy
  • 11. What is the scientific study of Earth called?
A) Ecology
B) Geology
C) Astronomy
D) Meteorology
  • 12. Which layer of Earth's atmosphere is closest to the planet's surface?
A) Troposphere
B) Mesosphere
C) Stratosphere
D) Thermosphere
  • 13. What are the four inner rocky planets in our solar system?
A) Sun, Mercury, Venus, Earth
B) Earth, Mars, Jupiter, Saturn
C) Jupiter, Saturn, Uranus, Neptune
D) Mercury, Venus, Earth, Mars
  • 14. Approximately how long does it take for the Earth to complete one full rotation on its axis?
A) 12 hours
B) 24 hours
C) 36 hours
D) 48 hours
  • 15. Which is the largest desert in the world?
A) Sahara Desert
B) Arabian Desert
C) Antarctica
D) Gobi Desert
  • 16. What is the imaginary line that divides the Earth into the Northern and Southern Hemispheres called?
A) Equator
B) Tropic of Capricorn
C) Prime Meridian
D) Tropic of Cancer
  • 17. Which phenomenon causes the appearance of colors in the sky during sunrise and sunset?
A) Rayleigh scattering
B) Rainbow refraction
C) Aurora borealis
D) Greenhouse effect
  • 18. What is the most abundant element in the Earth's crust?
A) Aluminum
B) Silicon
C) Carbon
D) Oxygen
  • 19. Which natural satellite orbits the Earth?
A) Ganymede
B) Titan
C) Europa
D) Moon
  • 20. Which geological era saw the rise of dinosaurs?
A) Cenozoic Era
B) Mesozoic Era
C) Paleozoic Era
D) Precambrian Era
  • 21. Which force holds the Earth in its orbit around the Sun?
A) Centrifugal force
B) Gravity
C) Friction
D) Magnetism
  • 22. What is the name of the massive supercontinent that existed before Pangaea?
A) Laurasia
B) Gondwana
C) Rodinia
D) Pannotia
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