1) A person counts the number of flowers she sees on different types of plants. She records data every week.
a. Independent Variable (IV):
b. Dependent Variable (DV):
c. Control Group:
d. Constants:

Explanation:

An independent variable is the variable that is intentionally altered or changed during the course of an experiment and is not dependent on another variable. The independent variable from the narration in the question is the different types of plants (as seen, the type of plant was intentionally changed during the course of the experiment).

A dependent variable is the variable whose "outcome" is assumed/expected to be dependent on another variable called the independent variable. The dependent variable from the narration in the question is the number of flowers (as seen, the outcome/number of flowers is expected to be dependent on the type of plant).

The control group is the group that is used as a reference (or benchmark) for the sake of comparisons while reporting an experiment. From the narration in the question, nothing was mentioned as regards the control group.

Constants are unchanged factors that are maintained throughout the course of an experiment. From the narration, the constant is the time in which her observations are done which is weekly (every week).

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