1. Monday, February 25, 2019
Objective:
YWBAT describe the three soil horizons and how they form.
Drill: Identify and describe the three soil horizons.
Homework
Study WOW

2. Answer Horizon A Horizon B Horizon C
The top layer,
Consists of topsoil and
Contains more humus than any other layer.
Horizon B
Subsoil
Where clays and dissolved substances from Horizon A collect,
Contains less humus than Horizon A
Horizon C
Consists of partially weathered bedrock which is usually the parent rock of the above soil

3. Did you know…?
In some desert areas, a special soil called crytogamic soil is actually alive! The soil is composed of different species of mosses, lichens, fungi, and algae. It is dark brown and crusty. It absorbs water like a sponge and provides a unique habits for desert seeds to germinate.

4. Geoblox ‘Soil Profiles’ Conclusion
Today’s Activities
Drill
Geoblox ‘Soil Profiles’
Conclusion

5. List four factors that affect the rate at which soil horizons form.
Closure
List four factors that affect the rate at which soil horizons form.

6. Closure Answer Type of bedrock Climate Local topography
Type of organisms present