Erosion and weathering

Question 1

Which observation best provides evidence that water is causing erosion on a hillside?

Accepted Answer

The rocks near the stream have smooth, rounded edges.

Answer

The hill is covered with many tall, healthy trees.

Answer

The leaves on the trees are turning orange and falling.

Answer

The soil on the hill is dry and compact.

Question 2

A fourth‑grade student visits the school garden after a heavy rain and records what they see. Which observation best shows that water has caused erosion of the soil?

Accepted Answer

The soil surface is smoother and some small rocks that were there before are missing.

Answer

There is more shade on the garden floor because a tree branch fell.

Answer

The soil is dry and has deep cracks.

Answer

Several garden plants have wilted leaves.

Question 3

After a heavy rain, a student measures a 15‑centimeter‑long channel that formed on a dirt path. Which observation best explains this evidence of erosion?

Accepted Answer

Water runoff washing away the soil

Answer

Freezing water expanding in the soil

Answer

Plant roots growing and pushing the soil apart

Answer

Strong wind blowing sand across the path

Try three questions

Which observation best provides evidence that water is causing erosion on a hillside?

A fourth‑grade student visits the school garden after a heavy rain and records what they see. Which observation best shows that water has caused erosion of the soil?

After a heavy rain, a student measures a 15‑centimeter‑long channel that formed on a dirt path. Which observation best explains this evidence of erosion?

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