What would happen to global sea levels if all the ice in West Antarctica melts?

A. it would not change because the volume of water you get from melting ice is only slightly more than the volume of the ice

B. it would not change because the volume of water you get from melting ice is only slightly less than the volume of the ice

C. sea level would fall because of isostatic rebound

D. sea level would rise by a significant amount

Which among the following statements regarding the discovery of DNA is true?

The present-day tilt of earth's axis of rotation is 23.5. What would be the result of more tilt?

What are these sharp, glacially carved ridges?

A. cirque

B. arate

C. hogback

D. razorback

E. flatiron

What is the origin of curved ridges (R on this flgure) in the Great Lakes area?

A. folds produced during a continental collision

B. paths of ancient rivers

C. piles of sediment deposited by retreating glaciers

D. remnants of a meteoroid impact

Which of the following is NOT a type of evidence left behind by glaciers?

A. scratched and polished bedrock

B. scattered stones (dropstones) in fine-grained sediment

C. changes in the isotopic compositions of marine shells

D. V-shaped valleys

E. all of these are evidence left behind by glaciers

What happens when a glacier encounters the sea or a lake?

A. the ice is more dense than water and so scrapes along the bottom

B. white icebergs float but blue icebergs sink to the bottom

C. large blocks of ice collapse off the front of the glacier and become icebergs

D. rocks released from melted icebergs float on the water surface

E. all of these

What would happen if the amount of ice in this area increases?

A. the land near the ice would rise

B. the area near the ice would experience isostatic rebound

C. the weight of the ice depresses the land, possibly causing river to change direction

D. none of these

Which of the features labeled on this figure is a drumlin?

A. A

B. $\mathrm{B}$

C. C

D. D

What percentage of the world’s glacial ice is included in the Antarctic Ice Sheet?

(a) Describe what has happened to the extent of Arctic sea ice since 1980: _____________. (b) Describe what has happened to Arctic air temperature since the early 1900s: ___________. (c) Based on the data above, do you think that the change is Arctic air temperature is affecting the extent of the Arctic sea ice? Justify your answer. ____________

Draw a diagram explaining the water cycle. Label the processes involved as biological or physical/chemical.

Draw and label a diagram showing the stages in the life cycle of a typical gymnosperm

Data for the area of sea ice in the Arctic is obtained from satellite images. The rate of change of the area of Arctic sea ice (in millions of $\mathrm{km}^2 / \mathrm{yr}$ ) is shown in the table for the period 2003-2011. Use the Trapezoid Rule to estimate the net change in Arctic sea ice over this period. Interpret your answer.