Soil Science - Post Test - Animal & Plant Science

Name

Class Period

• 1st
• 2nd
• 3rd
• 4th
• 5th

What are the four components of soil and percentages?

A soil horizon is a vertical section of soil that extends from the ground surface to the underlying rock

• True
• False

The most accurate definition of soil is:

• A substance that farmers use that supports plant growth.
• A mixture of organic matter, mineral components, water, and air that supports plant growth.
• A group of minerals, which are very valuable.
• A substance that is extracted from wells.

Which of the following is NOT a key ingredient of soil?

• Organic Matter
• Minerals
• Air
• Hemoglobin

What percentage of the average soil is organic matter?

• 5%
• 25%
• 45%
• 15%

Please name each of the soil horizons ( Our Aunt Erma Bakes Cookies Regularly)

Which soil horizon is known for topsoil

• A Horizon
• B Horizon
• C Horizon
• R Horizon

Name all FIVE soil forming factors