The Atmospheric Residence Times of Inert Gases,such as Helium and Argon

question 18

Multiple Choice

The atmospheric residence times of inert gases,such as helium and argon,

• A) Are quite short, as these gases are removed by precipitation.
• B) Are strongly controlled by human activities.
• C) Have virtually infinite residence times.
• D) Cannot be estimated because their natural cycles are complex.

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Definitions:

Metaphor

A descriptive type of analogy, frequently found in literature.

Necessarily Follows

A logical condition where the conclusion is an inevitable result of the premises; if the premises are true, then the conclusion cannot be false.

Inductive

A method of reasoning in which the premises are viewed as supplying strong evidence for the truth of the conclusion.

Harmful Outcomes

Negative results or consequences that arise from a particular action or set of circumstances.