What has been one consequence of desertification?
A)The rate of global warming is accelerating.
B)There are more droughts.
C)Environmental refugees have a greater area to settle.
D)Croplands and rangelands are less productive.
E)The Sahara is no longer a fertile savanna.
D
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Which type of radiation—alpha, beta, or gamma—results in the least change in atomic number?
A) alpha radiation B) beta radiation C) gamma radiation D) They all result in the same change in atomic mass number.
In which countries will the most people be affected by a ??-m rise in sea
level? What will be an ideal response?
A meteorite impact crater can be distinguished from a volcanic crater through the presence of
A) volcanic rock B) high pressure metamorphic minerals C) dust surrounding the crater D) a raised crater rim
In a material that holds groundwater, porosity
A. determines the composition of the cement between grains and clasts. B. controls the amount of water that can be stored. C. does not depend on the size and shape of grains and clasts. D. is constant from one type of material to another.