In a High School Laboratory, Which of the Following Constitutes

question 20

Multiple Choice

In a high school laboratory, which of the following constitutes an experiment?
I.learning to use a microscope by examining fixed specimens on slides
II.being able to examine swimming protists under a microscope
III.extracting pigments from plant leaves and separating the types of pigments for identification
IV.preparing root tips for examination by staining them

• A) I only
• B) II only
• C) III only
• D) II and III only
• E) II, III, and IV

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Definitions:

Ceiling Effect

A limitation in data measurement where higher values become indistinguishable due to the upper limit of the scale being reached.

Confounding

An uncontrolled variable varies systematically with an independent variable; it is impossible to separate the effect of the independent variable from the confounding variable.

Independent Variable

The variable in an experiment that is manipulated by the researcher to observe its effect on the dependent variable.

Uncontrolled Variable

An uncontrolled variable is a factor that can affect the outcome of an experiment but is not kept constant or limited by the researcher.