1. Bell Ringer Get IAN Write ‘study guide’ on Bell Ringer sheet
Get out Study Guide
Review notes to explain the difference between Erosion and Weathering.
Sit Quietly
Study guide answers will begin very soon.

2. NEWS
TEST MONDAY
NO SCHOOL TUESDAY
HOMEWORK DUE WEDNESDAY

3. by amores
by josh

4. 1. When the question pops up you will only have a short amount of time to write.
2. If you miss it… too bad.

5. The breaking down of rock.
1. Define weathering.
The breaking down of rock.

6. Changes in shape. 2. Define mechanical weathering.
What are the agents of mechanical weathering?
Changes in shape.
Animals, roots, ice, wind, water, gravity

7. Two objects hitting one another.
3. Define abrasion.
Weathering by abrasion is caused by …
Two objects hitting one another.
Sediment carried by wind or water hitting and breaking down a rock.

8. Create an illustration.
4. Define Ice-wedging.
Create an illustration.
The process of water repeatedly freezing and thawing

9. 5. What happens when water freezes?
It expands

10. Water, lichen, acid rain, oxidation
6. Define chemical weathering.
What are the agents of chemical weathering?
Changes color
Water, lichen, acid rain, oxidation

11. 7. When oxygen reacts with iron in rock it causes the rock to…
This process is called…
Rust
oxidation

12. Precipitation that is more acidic than normal.
8. Describe acid precipitation. What is the main cause of acid precipitation?
Precipitation that is more acidic than normal.
Pollution in the air.

13. Living things can produce acids that slowly break down rock.
9. Describe how acids in living things chemically weather rock. Give an example of a living thing that chemically weathers rock.
Living things can produce acids that slowly break down rock.
Lichen

14. The wearing down of rocks by animals and plants
10. What is biological weathering?
The wearing down of rocks by animals and plants

15. The greater the surface area the faster weathering takes place.
11. Describe how surface area affects the rate of weathering of rocks.
The greater the surface area the faster weathering takes place.

16. 12. How are the peaks of mountains and the edges of rocks affected by the weathering process?
The peaks of mountains and the edges of rocks become rounded and smoother.

17. The movement of sediment to a new location
13. Describe the process of erosion.
The movement of sediment to a new location

18. Planting trees, crop rotation, no-till farming
14. What can be done to reduce the effects of erosion on steep slopes?
Planting trees, crop rotation, no-till farming

19. Water—carries sediment down river. Wind – abrasion
15. Describe how the following agents cause erosion. Moving water (rivers), wind, glaciers, waves, and gravity.
Water—carries sediment down river.
Wind – abrasion
Glaciers – creates valleys
Waves-moves sediment from one beach to another.
Gravity –pulls sediment down a mountain.

20. 16. Compare and contrast deltas and alluvial fans.
Deltas are formed from deposited sediment creating mini rivers. Alluvial fans are fan shaped deposits of sediment

21. When sediment loses energy and stops moving, it settles into place.
17. Describe the process of deposition.
When sediment loses energy and stops moving, it settles into place.

22. 18. Describe the landforms that are created when agents of erosion drop the sediments they are carrying (process of deposition). (wind, moving water, gravity, glaciers, and waves)
SKIP!!!!

23. 19. Define soil.
Soil is a mixture of weathered material (sand- largest, silt, & clay-smallest), organic matter, air and water.

24. 20. Describe how soil forms.
Soil begins with the weathering of rock. The soil then adds biological material to create humus and the other layers of soil.

25. decaying plants and animals
21. Humus found soil comes from…
decaying plants and animals

26. 22. What is soil conservation?
Describe the benefits that soil provides.
Planting trees, crop rotation, no-till farming, terracing, and cover crops help soil to not erode as quickly.

27. 23. Draw a model of the soil profile
23. Draw a model of the soil profile. Label each horizon and write a description for each.
Horizon O –  Organic Layer
Horizon A – Topsoil (humus, plant root, and decayed organisms) 
Horizon B -- Subsoil
Horizon C – weathered rock
Horizon D – Bedrock (solid rock)

28. The End