earth science questions.. HELP :O!?

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oriana

New member
The Great Plains of the United States are an example of what type of climate?
A. tundra
B. desert
C. semiarid
D. highland

Compared to today , temperatures during the last Ice Age were approximately
A. 1`C cooler
B. 5`C cooler
C. 20`C cooler
D. 50`C cooler

Volcanoes may have caused the relative warmth of the cretaceous period by
A. adding carbon dioxide to the atmosphere
B. removing carbon dioxide from the atmosphere
C. adding dust to the atmosphere
D. causing acid droplets to form in the atmosphere
 
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