Activity 3. Multiple Choice
Instruction. Write the letter of the correct answer in a separate sheet of paper.
1. What two processes involve in oxygen-carbon dioxide cycle?
A. oxygen-carbon dioxide process C. photosynthesis - respiration process
B. carbon dioxide process
D. animal-plant process
2. What process involved when plants use carbon dioxide and releases oxygen
gas? A. respiration B. photosynthesis C. oxygen
D. carbon dioxide
3. Which of the following correctly describes the oxygen-carbon dioxide cycle?
A. The oxygen-carbon dioxide cycle keeps the amount of oxygen in the air
fairly constant.
B. Humans and other animals breathe in oxygen and release carbon dioxide.
C. Plants absorb carbon dioxide and release oxygen.
D. Carbon-Oxygen Cycle is the cause of global warming.
4. Oxygen is a gas produced by and used by
A. animals, plants
B. plants, animals
C. photosynthesis, respiration
D. respiration, photosynthesis
5. Carbon dioxide is a gas produced by
A. animal, plants
B. plants, animals
and used by
C. photosynthesis, respiration
D. respiration, photosynthesis