1. Why is abrasion (scraping) an example of mechanical weathering?

1
1. Why is abrasion (scraping) an example of
mechanical weathering?

• Because rock is physically broken down by force.

2
2. Explain why weathering occurs faster in
summer at the coast.

• Because the coast is warm and wet.

3
3. What could we have done to speed up the rate
of weathering of the chalk?

• We could have broken the chalk into smaller
  pieces, heated up the vinegar, or added a
  stronger acid.

4
4. Which soil horizon contains the least amount
of humus?

• C horizon

5
5. Name three ingredients in soil.

• Air, water, sediment (rock particles), organic
  material (humus)

6
6. Which soil horizon is also known as subsoil?

• B horizon

7
7. Why is contour plowing an example of soil
conservation?

• It helps prevent soil loss through erosion.

8
8. How are the crust and inner core similar?

• They are both solid.

9
9. How are the crust and mantle different?

• Crust cracks easily, and mantle is flexible.

10
10. How is the outer core different from all
other layers?

• It is liquid.

11
11. How did fossils of Mesosaurus support
Wegeners theory of continental drift?

• Fossils were found on now distantly separated
  land, and it was too small to swim the long
  distance between.

12
12. What would happen if the rock in the mantle
was not hot?

• Convection in the mantle would not occur, and the
  tectonic plates would not move.

13
13. What type of plate boundary is found along
the mid-ocean ridge?

• Divergent boundary

14
14. What does Plate Tectonics explain that
Continental Drift didnt?

• Plate tectonics explains HOW the continents move.

15
15. Why do earthquakes often happen along plate
boundaries?

• There is movement of the plates along the plate
  boundaries where they scrape and push against
  each other.