Test Review: Weathering, Soil, Mass Wasting

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Soil formation begins with the weathering of_______.

• Humas

• Subsoil

• Litter

• Bedock

Which soil component makes up about 5% of a loamy soil?

• Water

• Organic Matter

• Air

• Minerals

Which soil component makes up about 45% of a loamy soil?

• Water

• Organic Matter

• Air

• Minerals

Which soil component makes up about 25% of a loamy soil?

• Water

• Organic Matter

• Air

• Water & Air

The two main factors that determine the rate of weathering are the TYPE of rock and_____.

• Music
• Climate
• Size of rock
• Weight of rock

The texture of soil depends mainly on ---

• the types of plants that grow in the soil.

• the size of the particles in the soil.

• the color of the soil.

• the number of worms in the soil.

Why is soil an important natural resource?

• soil is used to make buildings

• soil can grow crops

• soil comes from bedrock

• soil is full of microbes

What do we call the layers of soil?

• Deposits
• Horizons
• Minerals
• Rocks

_______ is the type of soil used most often with plants and on farms. It is a mixture of clay, sand, and silt.

• loam
• humus
• soil
• dirt