Rocks and SoilQuiz

1.

Which type of rock is formed from cooled lava?

2.

What is humus?

3.

What is weathering?

4.

Which type of soil is best for growing plants?

5.

Which of these helps break rocks apart through frost action?

6.

Name one living thing that lives in soil and helps mix it.

7.

What are tiny pieces of rock mixed with humus called?