Soil Components Review

What is soil formed from?

• Water

• Parent material

• Air

• Fire

What happens to rocks to form soil?

• They melt

• They freeze

• They are weathered or eroded into small particles

• They grow larger

What is weathering?

• The process of melting rocks

• The process of freezing water

• Wearing away or changing the appearance or texture of something by long exposure

• Growing plants

Which of the following is a major factor that controls the type of soil that forms?

• Color

• Climate

• Texture

• Smell

What role do organisms play in soil formation?

• They change the soil's color.

• They help in the breakdown of materials.

• They make the soil smell nice.

• They increase the soil's temperature.

How does time affect soil formation?

• It changes the soil's color.

• It allows for the development of soil layers.

• It makes the soil smell different.

• It increases the soil's temperature.

What percentage of an ideal soil is made up of minerals?

• 25%

• 50%

• 45%

• 10%

What do minerals provide to soils?

• Color

• Texture

• Nutrients

• Moisture

What is one of the components of soil that can be plant, animal, or microbes?

• Minerals

• Organic Matter

• Water

• Air

What percentage of ideal soil is made up of organic matter?

• 10%

• 20%

• 5%

• 15%