6. What is the name of the layer of the Earth’s atmosphere that contains the ionosphere?
a) Stratosphere
b) Troposphere
c) Mesosphere
d) Thermosphere
7. What is the name of the process by which water vapor in the atmosphere is converted into liquid or solid water?
a) Evaporation
b) Sublimation
c) Condensation
d) Precipitation
8. What is the name of the process by which water in the Earth’s surface, such as rivers, lakes, and oceans, is converted into water vapor and released into the atmosphere?
a) Transpiration
b) Evaporation
c) Condensation
d) Precipitation
9. Which of the following is not a component of air?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Water vapor
10. What is the name of the process by which gases in the atmosphere trap heat and prevent it from escaping into space?
a) Reflection
b) Refraction
c) Absorption
d) Greenhouse effect
