Gas Fills All the Space Available to It

question 19

Multiple Choice

Gas fills all the space available to it. Why then doesn't the atmosphere go off into space?

• A)It does, but the rate is so slow that our atmosphere will remain for millions of years.
• B)The atmosphere is held down by gravity.
• C)The rate at which air molecule escape into space is about equal to the rate that they are produced by various mechanisms, such as volcanic activity and photosynthesis.
• D)There are molecular attractions between air molecules and the earth's surface.

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Definitions:

Testosterone

A steroid hormone associated with the development of male secondary sexual characteristics, as well as playing a role in the biological function of females.

Androgen

A type of hormone that plays a role in the development and maintenance of male traits and reproductive activity, primarily produced in the testes.

Estrogen

A group of steroid hormones that play a critical role in female reproductive and sexual health, but also affect many other tissues and organs.

Sexual Orientation

An enduring pattern of emotional, romantic, or sexual attractions to men, women, both, neither, or another gender.