1. Do Now List 3 examples of Weathering. List the 4 types of Erosion.
What is the most powerful erosion agent?

2. What is soil? What is it made of? What’s in it?
Daily Goal:
SWBAT define soil andinterpret soil diagrams based on composition.
What is soil? What is it made of? What’s in it?

3. The main component of all soils is sediment which are rocks & minerals.
Sediments depend on the type of rock from which they form.
The type and amount of sediment help determine the type of soil.
Examples: sand, clay, humus

4. Soil is also made up of humus (dead plants and animals), air and water.

5. That means soil has 4 components:
Minerals
Humus
Air
water

6. There are 12 types of soil depending how much of the soil is made up of minerals, humus, air and water.

7. The size of the sediments determines the texture of the soil
The size of the sediments determines the texture of the soil. In order from smallest sediment size to largest size, we have clay, silt, and sand.
Clay
Silt
Sand

8. The percentage of silt, sand, and clay determines the texture of the soil.
A Soil Diagram will help us figure out what the texture of the soil is based on the percentage of silt, sand, and clay in the soil.

9. E
DO NOW
What are the three minerals that make up soil? (list them in order of smallest to largest)
What type of soil is made up of 30% sand, 50% clay, 20% silt?
What type of soil is made up of 60% sand, 30% clay, 10% silt?
What type of soil is made up of 40% silt, 20% clay, 40% sand?

10. UNIT 2 Review! Quiz Quiz Trade!
Class is divided in half, A’s and B’s.
Everyone starts with a question strip and answer.
Silently raise your hand to show that you are ready to Quiz Quiz Trade!
Find a partner, (someone you have not met yet) that is from the opposite group
A’s ask their question first, B answers.
B asks their question, answer is discussed.
A and B trade their question slip.
A’s raise their hand silently when ready to find a new partner. When I say go you find a new partner that you have not worked with yet.