WVGSA Grade 5 Science Practice Questions - West Virginia General Summative Assessment Grade 5 Science Exam

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Every autumn, hardwood trees in West Virginia shed millions of pounds of leaves onto the forest floor. By late spring, the thick leaf layer has broken down into rich black topsoil. How is matter recycled in this forest?

Rain washes all leaves into underground caves. Decomposers break down dead leaf matter, releasing carbon dioxide to the air and recycling mineral nutrients into topsoil for new plant growth. Forest animals carry all leaves away for winter nests. Leaves turn into solid granite rock over winter.

Correct Answer:

Decomposers break down dead leaf matter, releasing carbon dioxide to the air and recycling mineral nutrients into topsoil for new plant growth.

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