Which of the following solar energy uses has been used by people for thousands of years?
A. Active solar heating system
B. Passive heat absorption
C. Parabolic solar collection
D. Cogeneration
E. All of these are correct.
Answer: B
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What will be an ideal response?
In some minerals the bonds are equally strong in all directions, therefore they have no cleavage but instead ________ along irregular surfaces that are commonly curved.
A. chip B. fracture C. luminesce D. flatten E. bend
Which of the following is not a function that organic matter serves in soil?
A) Separates soil particles B) Bonds nutrients C) Cycles nutrients vital for health D) Serves as an energy source for organisms
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