The phenomenon of trapping heat in the Earth’s atmosphere is known as:
a) Acid rain
b) Greenhouse effect
c) Ozone depletion
d) Photochemical smog
Answer: b) Greenhouse effect

The gas that absorbs harmful ultraviolet rays in the atmosphere is:
a) Carbon dioxide
b) Ozone
c) Methane
d) Nitrogen
Answer: b) Ozone

The primary source of carbon dioxide in the atmosphere is:
a) Respiration
b) Photosynthesis
c) Combustion of fossil fuels
d) Nitrogen fixation
Answer: c) Combustion of fossil fuels

Acid rain is caused primarily by:
a) Ozone depletion
b) Carbon dioxide
c) Sulfur dioxide and nitrogen oxides
d) Chlorofluorocarbons
Answer: c) Sulfur dioxide and nitrogen oxides

Which of the following is a consequence of global warming?
a) Ozone layer recovery
b) Rising sea levels
c) Increased volcanic activity
d) Decreased UV radiation
Answer: b) Rising sea levels

The Earth’s atmosphere is divided into layers based on:
a) Pressure
b) Temperature
c) Composition
d) Altitude
Answer: b) Temperature

The process by which plants release water vapor into the atmosphere is called:
a) Evaporation
b) Condensation
c) Transpiration
d) Sublimation
Answer: c) Transpiration

Which gas is most responsible for the greenhouse effect?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Answer: b) Carbon dioxide

Which pollutant is primarily responsible for the formation of photochemical smog?
a) Carbon monoxide
b) Nitrogen oxides
c) Ozone
d) Sulfur dioxide
Answer: b) Nitrogen oxides

The main source of methane in the atmosphere is:
a) Industrial processes
b) Respiration
c) Wetlands and livestock
d) Volcanic eruptions
Answer: c) Wetlands and livestock