________ is fine silt generated by glaciers that can be carried for long distances by the wind
A) Loess
B) Outwash
C) Till
D) Diamicton
Answer: A
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Fishing fleets are impacting the ecological resources of many penguins because
A) the fishing boats pollute Antarctic waters. B) supplies of fish, which are the food supply for penguins, are being depleted. C) fishing crews also collect penguins for sale to zoos. D) many penguins mate at sea and are killed in collisions with boats.
Methods for desalinating sea water to produce fresh water include ________
A) reverse osmosis and distillation B) making sea water acid to transform salts to solids C) treating with activated charcoal and clay D) treating sea water with salt-consuming marine bacteria E) filtration and sedimentation
How has global mean temperature changed since the mid-1800s?
What will be an ideal response?
The total amount of living material in an ecosystem is referred to as ____
a. biomass b. a food chain c. mosaic d. a life zone