Question

directions: use the diagram above and write \true\ or \false\ on the line next to each statement.
carbon cycle

1. animal respiration decreases the amount of co₂ in the atmosphere.
2. increasing the number of trees decreases the amount of co₂ in the atmosphere.
3. decomposers increase the amount of co₂ in the atmosphere.
4. forest fires (combustion) decreases the amount of co₂ in the atmosphere.
5. plant respiration increases the amount of co₂ in the atmosphere.
6. photosynthesis decreases the amount of co₂ in the atmosphere.
7. burning fossil fuels decreases the amount of co2 in the atmosphere.

Explanation:

Question 18

Animal respiration involves animals taking in oxygen and releasing carbon dioxide ($\ce{CO_2}$) into the atmosphere. So, it should increase, not decrease, the amount of $\ce{CO_2}$ in the atmosphere.

Trees perform photosynthesis, which uses $\ce{CO_2}$ from the atmosphere to make glucose and release oxygen. More trees mean more photosynthesis, so they decrease the amount of $\ce{CO_2}$ in the atmosphere.

Decomposers break down organic matter, and in the process, they release $\ce{CO_2}$ into the atmosphere through respiration. So, decomposers increase the amount of $\ce{CO_2}$ in the atmosphere.

Answer:

False

Question 19