A high-oxygen content and a low-nutrient content in surface seawater indicate that a population of ________ are present.
A. decomposers
B. phytoplankton
C. bacteria
D. animals
E. None of these is correct; they indicate no life presence.
Answer: B
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With a pulley having 2 strands supporting a load, to lift the load 1 m you pull a distance of
A. 2 m. B. 1 m. C. 1/2 m. D. more than 2 m.
Which of the following statements about streams is not true?
A) Base level is the lowest elevation to which a stream can erode. B) A steep stream high above base level generally will be eroding its channel. C) Some streams can simply transport material instead of eroding or depositing material. D) Streams typically do not respond to a change in climate.
The cultural landscape is determined by the language in use in the area.
Answer the following statement true (T) or false (F)
The scattered energy that reaches the earth's surface is called:
A) direct radiation. B) diffused radiation. C) albedo. D) ultraviolet light.