This figure shows plate boundaries south of Alaska. Which location is on a transform boundary?
A. 1
B. 2
C. 3
D. 4
E. 2 and 3
Answer: D
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A community of different organisms interacting with one another and with their nonliving environment of soil, water, and other forms of matter is called
A. a species. B. an ecosystem. C. a population. D. a lithosphere. E. a community.
According to the gas law, which of the following expresses the relation between air pressure and air density when temperature remains constant?
A.
B.
C.
D.
How does the World Bank classify countries in terms of economic categories?
What will be an ideal response?
When lightning strikes, nitrogen molecules, N2, and oxygen molecules, O2, in the air react to form nitrates, NO3-, which come down in the rain to help fertilize the soil. Is this an example of oxidation or reduction?
A. The formation of nitrates is an example of reduction. B. The formation of nitrates is an example of oxidation. C. Both. The nitrogen is oxidized as it reacts with the oxygen while the oxygen is reduced. D. Neither. Although the bonds of both the N2 and O2 molecules are broken to form the NO3-, neither oxidation nor reduction occurs.