Question 1

Which layer of soil contains the most humus?

Accepted Answer

topsoil

Answer

subsoil

Answer

bedrock

Answer

dirt

Question 2

What is the decayed remains of plants and animals called?

Accepted Answer

humus

Answer

bedrock

Answer

soil

Answer

weathering

Question 3

Why is soil an important natural resource?

Accepted Answer

soil can grow crops

Answer

soil comes from bedrock

Answer

soil is used to make buildings

Answer

soil is full of microbes

Question 4

What is the slow breaking apart of wearing away of rock into smaller pieces?

Accepted Answer

weathering

Answer

soil

Answer

deposition

Answer

erosion

Question 5

How do plants weather rocks?

Accepted Answer

When roots grow into cracks of rocks and expand the rock breaks

Answer

When the plant moves water from the roots to the leaves, the rock breaks.

Answer

none of the above

Answer

Plants don't weather rocks.

Question 6

The layers of soil are called these.

Accepted Answer

Horizons

Answer

Humus

Answer

Grains

Answer

Pores

Question 7

This is the smallest type of soil particle.

Accepted Answer

Clay

Answer

Sand

Answer

Silt

Answer

Gravel

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