1. POS

2. Unit 5: Planet Earth
Topic 3: Erosion

3. Brainpop-Erosion, Weathering

4. Erosion Is the movement of rock and mineral grains by wind and water
Causes
Effects (let’s make two columns)

5. Unveils Fossils

8. Caves

9. Waterfalls

10. Waves-Beach Erosion

13. The Athabasca Glacier

14. Erratic

15. Meandering rivers eventually straighten out as erosion along the inner banks carries away the sediment

16. Sea Arches

18. River erosion

20. The Grand Canyon

21. Hoodoos

22. What can be done to prevent erosion?

26. The Dirty 30’s The Great Depression

29. Weathering
Is the breakdown of rocks into sediment

30. Mechanical Weathering
Physically breaking apart rocks
Gravity breaking off rock
Frost wedging
Freeze-thaw
Erosion by liquid water (waves, rivers, rain)

34. Chemical Weathering Dissolved in the air/water Stalagmites/stalactites
Acid rain/acidic pools
Power of acid: Dissolving in coke?

38. Biological Weathering
Is mechanical and/or chemical
Usually plant roots push apart rock, and the chemicals help dissolve the rock
Also bacteria, fungi

45. Assignments
Vocab
Update journal topic 3