Professors Chase and Sanborn Are Conducting an Experiment on the Effects

question 55

Multiple Choice

Professors 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 and their recall of items on a word list is later assessed. Which pair correctly identifies a variable in this experiment

• A)experimental variable; memory
• B)independent variable; caffeine
• C)outcome variable; caffeine
• D)dependent variable; caffeine

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Definitions:

Longwall Mining

A method of coal mining where a long wall of coal is mined in a single slice, typically used in underground mines.

Smelting

The process of extracting a metal from its ore by using heat and a chemical reducing agent to decompose the ore, removing impurities.

Igneous Rocks

Rocks formed from the cooling and solidification of magma or lava, classified into intrusive (slow cooling inside the earth) and extrusive (quick cooling on the surface) types, such as granite and basalt.

Nonfuel Mineral Resources

Minerals found in the Earth's crust that are used for everything except fuel, such as metals, stone, and industrial minerals like gypsum and salt.