Examine the Apparatus Shown in the Following Image

question 43

Multiple Choice

Examine the apparatus shown in the following image. This apparatus would useful in which of the following separations?

• A)oxygen from nitrogen dioxide
• B)sand from a mixture of sand and water
• C)rubbing alcohol from a mixture of rubbing alcohol and water
• D)iron filings from cereal
• E)hydrogen and oxygen from water

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Definitions:

Independent Variable

The variable in an experimental study that is manipulated by the researcher to investigate its effect on the dependent variable.

Control Variable

A variable that is kept constant during a scientific experiment to ensure that the effect of the independent variable on the dependent variable is observed without interference.

Hypothetical Variable

A variable conceived by researchers to explain behaviors observed in their studies, but not directly observable or measurable itself.

Dependent Variable

A measurable outcome or effect in an experiment that is influenced by changes in the independent variable.