Earth's crust (or the Earth's lithosphere) is broken into how many rigid plates that have various sizes and can move?
a. ~ 10
b. ~ 20
c. ~ 50
d. ~ 100
Answer: b. ~ 20
Environmental & Atmospheric Sciences
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Autotrophic organisms are ________.
A. the base of the food web B. able to photosynthesize C. able to chemosynthesize D. All of these are correct. E. None of these is correct.
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Which sequence of numbers reflects the order in which the layers were deposited?
A. 4, 3, 1, 2 B. 1, 2, 3, 4 C. 1, 3, 4, 2 D. 4, 3, 2, 1 E. None of these.
Environmental & Atmospheric Sciences
Which of the following forms of radiation is identical to the nucleus of a helium atom?
A) a
Environmental & Atmospheric Sciences
Biological weathering includes processes that are fundamentally physical or chemical in nature
a. True b. False Indicate whether the statement is true or false
Environmental & Atmospheric Sciences