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5. Back What is the predominant agent of erosion in deserts? Ques. #1 Wind Ans.

6. A river dissolves salt. Is this a chemical or a physical change AND explain why. Back Ques. #2 Ans. Physical. The salt has not been chemically changed. When the water evaporates the salt remains.

7. What formed this valley AND explain how you know? Back Ques. #3 Ans. Formed by glaciers – It’s U-shaped

8. What name is given to the area indicated by the arrow? Back Ques. #4 Ans. A (river) DELTA

9. The tear-drop shaped feature in the photo is composed of what kind of sediment? Back Ques. #5 Ans. UNSORTED glacial till

10. What kind of particles might be found in suspension in zone D? Back Ques. #6 Colloids Ans.

11. Explain the pattern of deposition (in water) shown in the diagram. Back Ques. #7 Ans. The smallest beads were the most dense and the largest were the least dense.

12. Indicate three ways in which rocks are changed by long periods of stream abrasion. Back Ques. #8 Ans. They get rounder and smoother and smaller.

13. Back Ques. #9 Ans. Particle D When dropped into water, which particle would require the least time to settle?

14. During which season of the year would a stream in upstate NY be carrying the greatest total amount of sediment AND explain WHY? Ques. #10 Back Ans. Spring. Because melting snow increases stream volume which increases stream velocity. The faster a stream is moving the more material it can carry.

15. At what point in the stream (give letter A - D and depth 0.1 to 0.9) is deposition most likely to occur? Back Ques. #11 Ans. Location A at a depth of 0.5m

16. Back Ques. #12 Ans. These are MORAINES What term refers to the dark lines in the middle and along the sides of this glacier ?

17. Describe how and where this pattern of deposition may have occurred? Back Ques. #13 Ans. Where: In a lake. How: Deposition from streams carrying sediment into the lake repeating in an annual pattern.

18. What is the force driving all erosion? Back Ques. #14 Ans. Gravity

19. What would be the predominant agent of erosion for a climate that had a temperature of 25 degrees C and 30mm of annual precipitation. Back Ques. #15 Ans. In an arid climate wind is the most important agent.

20. Which agent of erosion is responsible for depositing this soil? Back Ques. #16 Ans. Glaciers - the particles are unsorted

21. When a piece of limestone is placed in acid, bubbles of carbon dioxide are produced? This is an example of what process? Back Ques. #17 Ans. Chemical weathering

22. Back Ques. #18 Ans. It is very old and the slope is nearly flat. What do you know about the age and the slope of this river.

23. What agent of erosion has affected this area and what evidence do you see that supports your conclusion? Back Ques. #19 Ans. Glaciers - parallel grooves in the rock

24. A soil composed of silicate particles and organic material is found on top of limestone (carbonate) bedrock. What kind of soil is this? Back Ques. #20 Ans. A transported soil because its silicate composition is unrelated to the carbonate bedrock beneath it.

25. What kinds of particles will be carried by a stream moving at 5 cm/sec? Back Ques. #21 Ans. Sand AND everything smaller

26. Name 3 characteristics of particles that can affect the rate at which they settle in still water. Back Ques. #22 Ans. Size, shape, density

27. Which agent of erosion is responsible for eroding the valley shown in the diagram? Back Ques. #23 Ans. V-shaped valley cut by running water

28. What kind of energy is constantly decreasing during the process of erosion? Back Ques. #24 Ans. Potential energy

29. Back Ques. #25 Ans. 1)Increase the slope 2) Increase the amount of water in the trough 3) Narrow the outlet Name 3 different ways this equip- ment could be modified in order to increase the rate of water discharge.

30. Name four clues that would lead you to believe an area had been subject to glacial erosion. Back Ques. #26 Ans. 1) Parallel grooves in rocks 2) Narrow, deep lakes 3) U-shaped valleys 4) Unsorted sediments 5) Scratched & polished rock 6) Erratics

31. Back Ques. #27 Ans. Location D. Steepest slope means fastest rate of flow. At which location can the stream carry the largest particles?

32. Back Ques. #28 Ans. Location A (The higher the elevation, the greater the Pe) At which location would a particle in this stream have the greatest potential energy.

33. What term refers to rocks bouncing along the bottom of a stream? Back Ques. #29 Ans. Saltation

34. What is another term for physical weathering? Back Ques. #30 Ans. Mechanical weathering

35. YOU’RE A WINNER! Erratics and kettle lakes are signs of glacier (glacial) erosion