Earth

11. What is the name of the layer of gases that surround the Earth?
A) Atmosphere
B) Hydrosphere
C) Biosphere
D) Geosphere

12. Which gas makes up the majority of the Earth’s atmosphere?
A) Nitrogen
B) Oxygen
C) Carbon dioxide
D) Helium

13. What is the process by which plants convert sunlight into energy?
A) Respiration
B) Photosynthesis
C) Fermentation
D) Combustion

14. Which layer of the Earth’s atmosphere contains the ozone layer?
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Thermosphere

15. What is the name of the layer of Earth’s atmosphere where most weather occurs?
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Thermosphere