Page 33 - Science Course 1 (Book 1)

Mo.1-L3 : Vocabulary Review
Directions: On the line before each definition, write the letter of the term that matches it correctly.

Each term is used only once.

1. the factor that is changed by the investigator to observe how it affects a A. variable
dependent variable.
B. independent variable
2. any factor that can have more than one value.
C. dependent variable
3. the factor that a scientist observes or measures during an experiment
D. control group
4. The effects of changing the independent variable are observed and
recorded for this. E. experimental group

5. This contains the same factors as the experimental group, but the
independent variable is not changed.

Mo.1-L3 : Key Concept Organizer

Directions: On the line before each statement, write the letter of the correct answer.
How are independent variables and dependent variables related?

1. When scientists design a controlled experiment, they have to identify factors that can affect the
of an experiment.
A.outcome B.prediction C.independent variable

2. A variable is any factor that can have more than value(s).
A.one B.two C.three

3. In controlled experiments, there are two kinds of .
A.variables B.outcomes C.hypotheses

4. The independent variable is the factor that is changed by the investigator to how it
affects a dependent variable.
A.predict B.change C.observe

5. The is the factor that a scientist observes or measures during an experiment.
A.control group B.dependent variable C.independent variable

6. When the variable is changed, it causes the variable to change.
A.new, old B.dependent, independent C.independent, dependent

Mo.1-L3 : Key Concept Check
Directions: On the line before each statement, write the letter of the term that matches it correctly.
Some terms will be used more than once.

1. A controlled experiment has two groups, and A.the independent variable

2. The effects of changing the independent variable are observed and B.the experimental group
recorded for .
C.the control group
3. The control group contains the same factors as the experimental
group, but is not changed.

4. Without it is difficult to know if your experimental obser
vations result from the variable you are testing or another variable.

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