At Folger U

question 160

Multiple Choice

At Folger U., Drs. Chase and Sanborn are conducting an experiment on the effects of caffeine on memory. Participants are randomly assigned to a caffeine or a no caffeine group; their recall of items on a word list is later assessed. Which pair below correctly names and identifies the variables in this experiment?

• A) word recall - control variable; caffeine - experimental variable
• B) word recall - independent variable; caffeine - dependent variable
• C) word recall - dependent variable; caffeine - independent variable
• D) word recall - experimental variable; caffeine - control variable

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Definitions:

Topography

The general configuration of a surface, especially the land surface or seafloor, including its elevation, relief, and features; shape of the land.

Water Chemistry

The study of the chemical compositions, properties, and reactions of water, especially its behavior in natural and polluted environments.

Groundwater Chemistry

The study of the chemical characteristics and reactions of groundwater, including dissolved minerals, pollution, and the movement of contaminants.

Ground Surface

The top layer of the earth's crust that we walk on and interact with in our everyday lives.