Lesson 3: How Do Soils Form?

The remains of decayed plants and animals are called:

• bedrock

• humus

• precipitation

• rock

_________ is the foundation for your city or town.

• Hummus

• Soil

• Rock

• Climate

___________ loosen and mix soil as they burrow through it.

• Earthworms

• Spiders

• Ants

• Bees

A mixture of rock, organic material, water, and air in which plants can grow is called:

• Soil

• Rock

• Climate

• Bedrock

True or False.

All soils begin with weathering, the process of rock breaking apart.

• True

• False

What speeds up weathering?

• precipitation

• conservation

• elevation

• moderation

Horizon A is _________

• Topsoil

• Subsoil

• Bedrock

Horizon B is _________

• Topsoil

• Subsoil

• Bedrock

Horizon C is _________

• Topsoil

• Subsoil

• Bedrock

What are the main forms of soils discussed in this lesson?

Check all that apply.

• Sandy Soil

• Loamy Soil

• Clay-rich Soil

• Masa Soil