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Chapter 1.3 Review (8th)
Test Description: Designing an Experiment
Instructions: Answer all questions to get your test result.
1) The variable that is purposely changed in order to be tested is the
A
independent variable
B
dependent variable
2) A controlled experiment
A
introduces bias
B
tests several variables at once
C
tests only one variable and is free of bias
D
changes no variable
3) Determining that the moon is the same age as Earth based on comparison of the age of moon rocks to the age of Earth rocks is an example of
A
a scientific explanation
B
data
C
an estimate
D
a qualitative observation
4) To test a hypothesis, a scientist purposely changes the dependent variable
A
false
B
true
5) When drawing a conclusion, scientists examine the data to see if it supports or fails to support the hypothesis
A
true
B
false
6) The factor that may change in a controlled experiment is the dependent variable.
A
false
B
true
7) A helpful tool for keeping data organized during an experiment is a graph.
A
false
B
true
8) A hypothesis can be accepted as true after two repeated trials have been performed.
A
false
B
true
9) Scientists design controlled experiments to test a _____________
A
hypothesis
B
repeated trial
C
bias
D
scientific inquiry
10) A possible answer to a scientific question.
A
scientific explanation
B
scientific inquiry
C
hypothesis
11) A repetition of an experiment
A
repeated trial
B
independent variable
C
replication
12) A generalization that makes sense of observations by using logical reasoning.
A
scientific inquiry
B
dependent variable
C
scientific explanation
13) The process by which people gather evidence about the natural world and propose explanations based on this evidence
A
bias
B
scientific inquiry
C
controlled experiment
D
hypothesis
*select an answer for all questions
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