3rd Grade soil

Front

This is a layer of loose material that covers Earth's land.

Back

soil

Front

Soil has ___________ that plants need to grow.

Back

materials

Front

Soil contains tiny particles of rock, air, water and_________.

Back

humus

Front

This is remains of plants and animals that were once alive.

Back

humus

Front

As plant and animal remains decay, or rot, __________ are released.

Back

Nutrients

Front

Substances that living things need for energy and growth: air, nutrients, rocks, rivers

Back

nutrients

Front

Any process that breaks down rocks

Back

weathering

Front

How many layers does soil have?

Back

3

Front

What is the top layer of soil called?

Back

topsoil

Front

What layer of soil lies right under the topsoil? Options: topsoil, bedrock, subsoil, dirt

Back

subsoil