Environmental Science
A high Biological Oxygen Demand (BOD) indicates that:

water is pure
High level of microbial pollution
Low level of microbial pollution
absence of microbial action

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Environmental Science
Which of the following is not a reason why water warms and cools much more slowly than land?

A portion of the solar energy that strikes water is used to evaporate it
Heat energy is mixed in a deeper layer of water
It takes more heat to raise the temperature of a given amount of soil 1oC than it does to raise the temperature of water 1oC
Solar energy penetrates more deeply into water
Water has a higher heat capacity

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