Why is the pH of ocean water more acidic in deep water?
A) More organic material is present.
B) More carbon dioxide is present.
C) More oxygen is present.
D) Temperature is lower.
B
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What physical factor is considered most important for the success of a marine organism?
a. diffusion b. light c. surface-to-volume ratio d. active transport e. osmosis
This is a photograph of Augustine volcano in Alaska. Judging by its shape, and the eruptive activity in the photo, what kind of volcano is it?
A) shield volcano B) cinder cone C) composite volcano D) volcanic neck
Charles Darwin developed the idea of natural selection without understanding the gene concept.
Answer the following statement true (T) or false (F)
Earth's inner core is composed of:
a. molten lava. b. molten copper and nickel. c. solid basalt. d. solid iron and carbon. e. solid iron and nickel.