Chapter 5: The Good Earth

Front

What is weathering?

Back

Weathering is the process that breaks down rocks into smaller pieces to create soil.

Front

How long does weathering take?

Back

Weathering takes many years.

Front

What is humus?

Back

Humus is decayed matter in the soil.

Front

Why is soil important to people?

Back

Soil supports the growth of a lot of food.

Front

What component of soil has the most nutrients for plants?

Back

Clay has the most nutrients for plants.

Front

What happens to water when it freezes inside rocks?

Back

Water freezes inside rocks and splits them into smaller bits.

Front

What is the role of sunlight in relation to rocks?

Back

Sunlight warms surface rocks.

Front

What are the tiny particles of soil that hold water well?

Back

They are called silt.

Front

What is the movement of soil from one place to another called?

Back

It is called erosion.

Front

What is the top layer of soil called?

Back

The top layer of soil is called topsoil.