The presence of ____________________ in the upper 40 m or so of a glacier indicates that this portion behaves not as a plastic, but as a(n) ____________________ solid
Fill in the blank(s) with correct word
crevasses, brittle
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Which of the following is considered an "underdeveloped" country?
A) Australia B) Germany C) Japan D) United States E) none of the above
What is true of density, salinity, and temperature?
a. Water masses of the same density will not combine. b. Only one combination of temperature and salinity can yield a given density. c. Many combinations of temperature and salinity can yield the same density. d. Density of water tends to decrease with depth. e. Both temperature and salinity decrease with depth.
The controlled breeding of plants and animals, called _______________, dramatically gave humans the power to modify landscapes
Fill in the blank(s) with correct word
The force driving plate tectonics is ________
A) nuclear reactions in magma B) gravity C) heat in the inner layers of the earth D) solar radiation E) freezing and thawing of water in the earth's crust