Name
Class
Date
12.4 What is a soil profile?
Lesson Review
Complete the following.
1. Each layer in a soil profile is called a
2. The topsoil makes up the
.
horizon.
3. Horizon B is made up of a layer of soil called
.
4. Horizon C is made up mostly of
.
5. Humus is found mostly in the
horizon.
6. Beneath horizon C is a layer of
.
7. What is a soil profile?
Skill Challenge
Skills: interpreting, comparing, hypothesizing
Answer the question based upon the soil profiles.
1. Which soil profile shows a mature soil?
2. Which soil profile shows an immature soil?
3. Which horizon is missing from soil profile B?
4. Which horizons are present in both soil profiles?
5. In which soil would a plant with deep roots grow better? Why?