1-Which of the following is a correct relationship between streams and glaciers?
a. Valleys formed from glacial erosion are more U-shaped than valleys formed from streams
b. Stream sediments are more well sorted than glacial sediments
c. In straight stretches of streams and glaciers, the velocity of water and ice movement is generally lowest near the stream bank or glacier edge
d. A and B
e. All of the above
2-A glacier retreated in a series of steps. At each step, the glacial terminus remained stable for several years, then retreated rapidly to a new position. What kind of deposits would you expect to see?
a. A sheet of till extending up the valley from the terminal moraine
b. A series of moraines, progressively younger up the valley
c. One big lateral moraine
d. A series of moraines, progressively older up the valley
3-Which of the following would occur if the continental ice sheets on Greenland and Antarctica melted?
a. Florida goes undersea
b. Denver goes undersea
c. Houston goes undersea
d. A and C
e. All of the above
4-What would happen to the ratio of 18O to 16O of ice during ice ages? The water evaporated from the ocean is precipitated as snowfall that becomes part of the ice sheet.
a. Increases
b. Decreases
c. Stays the same