Regarding the energy efficiency of incandescent and fluorescent bulbs,
A) incandescent is more efficient because the electric current heats the wire filament directly.
B) incandescent is more efficient because it uses electric current, which is a highly efficient energy form.
C) fluorescent is more efficient because it does not use an actual electric current (a flow of electrons).
D) fluorescent is more efficient because very little heating is involved.
E) the two types have roughly equal efficiencies.
Question 2
The ozone layer is our friend because
A) it protects us from damaging ultraviolet radiation.
B) it protects us from damaging infrared radiation.
C) of the role it plays in keeping Earth warm.
D) its electrical properties help to bend radio waves around the earth.
E) it protects the earth from undergoing a harmful greenhouse effect.
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