Question

photosynthesis ____ carbon dioxide levels in the atmosphere
○ a. increases
○ b. decreases
value: 10
cellular respiration ______ carbon dioxide in the atmosphere.
○ a. increases
○ b. decreases
value: 10
as co2 levels increase the global temperature ______.
○ a. increase
○ b. decrease
○ c. stay the same
value: 10
what is the main contributor to global warming?
○ a. increase in co2
○ b. decrease in co2
○ c. decrease in oxygen
○ d. increase in nitrogen
○ e. all of these are correct
○ f. 1%

Explanation:

• Photosynthesis: Plants take in \(CO_2\) during photosynthesis. So it reduces \(CO_2\) levels.
• Cellular respiration: Organisms release \(CO_2\) during cellular respiration. So it increases \(CO_2\) levels.
• \(CO_2\) and temperature: \(CO_2\) is a greenhouse gas. More \(CO_2\) traps more heat, increasing global temperature.
• Global warming contributor: \(CO_2\) is a major greenhouse gas. Its increase is a main cause of global warming.

Answer:

1. b. decreases
2. a. increases
3. a. increase
4. a. increase in \(CO_2\)