What Do the Changing Percentages of Various Gases in the Atmosphere

question 128

Multiple Choice

What do the changing percentages of various gases in the atmosphere indicate about mechanisms that control the composition of the atmosphere?

• A)The changes indicate that the composition of gases is totally controlled by the amount and type of gases given off during volcanic eruptions.
• B)The changes indicate that the composition of gases is totally controlled by the composition of comets and meteors that strike Earth.
• C)The changes indicate that the composition of gases is to a significant extent controlled by biological processes occurring on Earth.
• D)The changes indicate that the composition of gases is exclusively controlled by chemical reactions between sunlight and the gases in the atmosphere.

---

Definitions:

Sampling Error

Differences between statistics calculated from a sample and statistics pertaining to the population from which the sample is drawn due to random, chance factors.

Confidence Interval

A sequence of values, from sample statistic studies, expected to encase the value of a population characteristic not yet revealed.

Confidence Interval

A spectrum of numbers obtained from sample observations which is expected to include the value of an unidentified population parameter, given a certain confidence degree.

Confidence Interval

A range of values within which there is a specified probability that the true parameter value lies.