Carbon Dioxide Is an Important Variable Gas Because

question 9

Multiple Choice

Carbon dioxide is an important variable gas because:

• A)it is widely distributed throughout the atmosphere.
• B)it is a "greenhouse" gas.
• C)it has been increasing steadily since the early 900s.
• D)all of the above

---

Definitions:

Instrument Decay

As a threat to internal validity, the possibility that a change in the characteristics of the measurement instrument, including human observers, is responsible for the results.

Journal

A periodical publication that contains scholarly articles and research findings on a specific academic field or area of interest.

Exposure

refers to the extent or duration to which an individual is subjected to a particular environment, substance, or condition.

Testing Effect

A threat to internal validity in which taking a pretest changes behavior without any effect on the independent variable.