1.  1. Attendance  2. Collect anything  3. New Notes  4. Worksheet Friday, April 27

2. Rocks break when exposed to the air, water and living things.

3. Softer rocks break first.

4. Limestone headstones weather relatively quickly.

5. Frost Action-water - freezes in cracks and expands.

6. Potholes get bigger because of frost action.

7. Roots can break rock apart.

8. Water makes rocks bump against each other and break.

9. Chemical Weathering – oxidation (rust)

10. Soil

11. Bedrock

12. Oops – bedrock – rocks under where we live

13. Hummus

14. Humus- part of soil made by dead and decaying organisms

15.  Star-nosed mole. Burrowing animals circulate air and nutrients in the soil.

16. Soil Profile

17.  Matches the bedrock below. Residual Soil – hasn’t been moved

18.  NYS. Glaciers have transported most of the soils. Transported Soils – have been moved.

19. Erosion – the transport of sediment

20. Sediment

21. GravityGravity – the driving force of downward movement of sediments

22. Landslide – when gravity pulls sediment down without the aid of water or wind. http://www.youtube.com/watch?v=eR77Mh KwAew

23. Mudslide http://Mudslide in Southern ItalyMudslide in Southern Italy

24. Running Water moves the most sediment.

25. How fast do sediments travel?

26. Running water breaks down mountains and brings the sediment elsewhere.

27. Straight streams flow faster.

28. More discharge = faster flow

29. Watershed - the area draining into a stream

30. Tributary – small stream that flows into a larger one.

31. Meander – curve in the river

32. Erosion and Deposition

33. Streams have V-shaped valleys.

34. Wind – horizontal movement of air.

35. Sandstorm in the Persian Gulf.

36. Wind can only carry small sediment.

37.  Notice that the rock has been “sandblasted” along the ground. Wind carries sediment close to the ground. Evidence of wind erosion.

38. Deserts have wind erosion.

39.  The wind carries small pieces of broken rock (sand). Shorelines are windy.

40. Sandblasting of rock

41. Sand Dunes are made by the wind dropping sand pieces.

42. Glacier – a moving mass of ice and snow.

43. Glaciers carry dirt and soil.

44. Striations – scratches in rock from the glaciers.

45. Glacial Till – mixed up, scratched rocks dumped as the glacier melted.

46. U-shaped valleys are from glaciers.

47. This hill was made by a glacier.

48. Waves

49. Waves come in parallel to the shore.