The function of a battery is to supply
A. energy to electrons in a circuit.
B. electrons to a circuit.
C. both of these
D. none of the above
Answer: A
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Is aging primarily an example of a physical or chemical change?
A. Aging cannot be classified as either a physical or chemical change. B. Aging is an example of a physical change since it involves our physical bodies getting older each day. C. Aging is an example of a chemical change involving the chemical reformation of our biomolecules. D. None of the above is true.
Why is erosion more severe at the beach in winter than in the summer?
A) Waves are stronger and more energetic in winter. B) Waves carry more sediment in winter. C) Weathering increases in winter. D) All of these
The density of seawater will increase when ____
A) the temperature increases B) the salinity decreases C) the salinity increases D) dissolved gases increase
Bioassessment uses ________ to determine water quality
A) pH B) dissolved oxygen C) turbidity D) conductivity E) living organisms