Predict the quality of soils in a tropical rain forest.
A. High quality due to high levels of leaching.
B. Low quality due to low organic input.
C. Low quality due to high levels of leaching.
D. High quality due to rich organic input.
Answer: C
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The difference between a rock and a mineral is that
A. rocks are harder than minerals. B. rocks are composed of minerals. C. rocks can be of a wider variety of origins than minerals. D. rocks are inorganic but minerals are organic. E. rocks are cycled over geologic time but minerals are not.
The species H3O+ can be called which of the following?
A) heavy water B) hydrogen ion C) hydronium ion D) all of these
The most abundant gas in Earth's lower atmosphere is _______________
Fill in the blank(s) with correct word
Earth's inner core is primarily composed of ____
a. molten lava b. molten copper and nickel c. solid basalt d. solid iron and carbon e. solid iron and nickel