Chapter 6, Lesson 2: pages 264-265

What can you find in soil?

• rocks

• minerals

• humus

• all of the above

What is nonliving plant or animal matter?

• horizon

• soil profile

• topsoil

• humus

What are some things found in soil that you cannot see?

• water

• air

• small living things

• all of the above

How long does soil take to form?

• hundreds or thousands of years

• millions of years

What causes rock to become sediment, which later leads to soil?

• subsoil

• topsoil

• weathering

• humus

What does humus have that helps new plants grow?

• soil

• nutrients

• subsoil

• bedrock

What are the soil layers called?

• a soil profile

• topsoil

• subsoil

• horizons

What shows the horizons, or layers, of soil?

• humus

• nutrients

• weathering

• a soil profile

What is another name for A horizon, the layer of soil at the surface that is rich in humus and minerals and is home to many living things?

• topsoil

• subsoil

• weathered bedrock

• bedrock

What is another name for the B horizon, the layer that is often lighter in color and harder than topsoil with bits of clay, minerals, and strong plant roots?

• topsoil

• weathered bedrock

• bedrock

• subsoil