Evidence That Molecules of a Gas Are in Constant Motion

question 43

Multiple Choice

Evidence that molecules of a gas are in constant motion is:

• A)winds exert pressure
• B)two gases interdiffuse quickly
• C)warm air rises
• D)energy as heat is needed to vaporize a liquid
• E)gases are easily compressed

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Definitions:

Developmental Norms

Benchmarks of typical behavior and abilities demonstrated by children and individuals at various stages of development.

Mean Age

The average age of individuals in a particular group or population.

Median Age

The age that divides a population into two numerically equal groups; half the people are younger, and half are older.

Modal Age

The most frequently occurring age in a given dataset.