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QuizMultiple Choice

Cycles of Matter — Quiz

Question 1 • Physical Science

After Gerry mows his lawn, he often puts the grass clippings into his flower garden. How will this affect his garden?

Answer
A
It will decrease the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.
B
It will increase the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.
C
It will decrease the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.
D
It will increase the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.

Explanation

Grass clippings contain carbon. Adding them to the garden supplies organic matter that decomposers break down, increasing the carbon added to the soil. As decomposers break down the clippings, they release carbon dioxide through respiration, so both soil carbon and carbon dioxide released increase. The correct choice is “It will increase the amount of carbon in the soil and increase the amount of carbon dioxide released by decomposers.”

AI-written and checked against the verified answer.

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