In food chains, energy moves from one source to the next, resulting in a loss of usable chemical energy to the environment. What is typically the amount of chemical energy transferred between trophic levels?
A. 5%
B. 10%
C. 15%
D. 90%
E. 100%
Answer: B
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Which two human activities are largely responsible for the observed atmospheric warming?
A. burning of fossil fuels and clearing of forest land B. burning of fossil fuels and growth of urban areas C. burning of rainforests and loss of ice in the Arctic D. cigarette smoking and the explosion of airline travel
Define beam depletion
What will be an ideal response?
Austerity programs
A) target cuts in private industry payroll. B) introduce furlough days in private firms. C) introduce new taxes on water and electricity. D) target cuts in government spending on welfare benefits. E) target the dissolution of unions.
What is NOT true about energy?
A. It makes things move. B. It exists in many forms. C. It is force acting over distance. D. It is neither created nor destroyed. E. It cannot change between forms.