In the year 2005 there were approximately ____ more sea otters in total than in 1985.
a. 100
b. 1,400
c. 500
d. 2,700
Ans: b. 1,400
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Water vapor is a greenhouse gas.
Answer the following statement true (T) or false (F)
The first agricultural revolution and the subsequent transition to food-producing minisystems resulted in all of the following except
A) more settlements. B) higher population densities. C) industrialization. D) nonagricultural specializations. E) barter and trade between communities.
In terms of the air temperature and water vapor content, explain how the relative humidity normally changes during the course of a 24-hour day
What will be an ideal response?
Glaciers that are fed by ice and snow in mountain areas and that usually occupy valleys that were previously created by stream erosion are called _______________ glaciers
Fill in the blank(s) with correct word