Which of the following decrease(s) photosynthesis in bodies of water?
a. disease-causing organisms
b. inorganic plant nutrients
c. sediment such as soil or silt
d. heat
e. organic chemicals
C
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The four layers of the atmosphere from the top down are: [INSERT FIGURE 1-13. REMOVE TEXT "THERMOSPHERE", "MESOPAUSE", "MESOSPHERE", "STRATOPAUSE", "STRATOSPHERE", "TROPOPAUSE", AND "TROPOSP
A) troposphere, stratosphere, mesosphere, thermosphere. B) thermosphere, stratosphere, mesosphere, troposphere. C) stratosphere, mesosphere, thermosphere, troposphere. D) thermosphere, mesosphere, stratosphere, troposphere.
At a warm front, the warm air:a
rises and cools. b. rises and warms. c. sinks and cools. d. sinks and warms.
Examples of valuable nonmetallic minerals extracted by mining are ________
A) gold, platinum, copper B) sand, gravel, phosphate C) nitrogen, hydrogen, neon D) radon, radium, sodium E) lead, cadmium, mercury
A star in which light cannot escape because of the immense gravitational pull is called a(n) ________
Fill in the blank(s) with correct word