In the United States educational services account for about ________ percent of jobs
A) 10
B) 2
C) 1
D) 35
E) 25
Answer: A
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What happens to energy transfer between steps in the food chain?
A. Energy transfer increases up the food chain. B. Energy transfer is constant up the food chain. C. Energy transfer decreases up the food chain.
When Pete places a sealed can of air on a hot stove, air in the can increases in
A. pressure. B. temperature. C. thermal energy. D. all of the above
The time it takes for one wavelength to pass a fixed point is known as:
a) wave frequency b) wave period c) wave steepness d) internal wave development e) wave time
Given the following time frames for an energy source to be renewed, which one is nonrenewable?
A. coal: 10 million years B. solar energy: 0 hours (except at night) C. switchgrass: 3 months D. trees: 50 years