Environmental Science
Typically, water vapour occupies about what percentage of the air's volume near the earth's surface?

Close to 10 percent
Less than 4 percent
About 21 percent
None of these
About 78 percent

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Environmental Science
A term biotype means

all individuals having same genotype
all individual with different phenotype
all individuals having same phenotype
all individuals with different genotype

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Environmental Science
Thermal belts are:

Cold, below-freezing air found at the top of a mountain
Pockets of cold air resting on a valley floor at night
Pockets of warm air resting on a valley during the afternoon
Warmer hillsides that are less likely to experience freezing conditions

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Environmental Science
When clouds are viewed near the horizon, the individual cloud elements usually:

Appear farther apart than is actually the case
Appear closer together than is actually the case
Appear lighter in color than is actually the case
Appear to have more vertical development than is actually the case

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