North Carolina Science Grade 7

Chapter 1: The Nature of Science and Technology

Section 2 Self-Check Quiz-Eng.

1.
In order to discover the source of cholera in 1854, Dr. John Snow used __________ to solve the problem.
A)a model
B)computers
C)unproven theories
D)a telephone
2.
What is the first step to take when solving a problem with scientific methods?
A)recognize the problem
B)draw conclusions
C)analyze data
D)identify the dependent variable
3.
__________ is a statement that can be tested.
A)A hypothesis
B)A control
C)A model
D)A bias
4.
In an experiment, __________ is the part of the investigation that is changed.
A)the control
B)the first trial
C)the conclusion
D)the independent variable
5.
Which of these are the variables that stay the same throughout the experiment?
A)the independent variable
B)the constant
C)the trials
D)the data
6.
_________ is a sample from an experiment that does not have the independent variable applied to it.
A)A control
B)A trial
C)A hypothesis
D)A bias
7.
Which of these is true?
A)Only one trial of an experiment is ever necessary.
B)It is best to change methods between trials in an experiment.
C)Conducting more trials of an experiment provides more reliable results.
D)Unusual outcomes never occur in an experiment.
8.
__________ help organize the observations and results of your experiment.
A)Goggles
B)Beakers
C)Data tables
D)Independent variables
9.
Before you begin an experiment, you have an expectation of the results. Which of these is true?
A)You don't need to run the experiment, because you already know the results.
B)Any results that are different from your expectation are wrong.
C)You don't need to take measurement during the experiment.
D)You have a bias about the experiment's outcome.
10.
Which of these is true?
A)Data tables can be completed any time after an experiment is finished.
B)Take as much time as you would like to complete any experiment.
C)Do not skip steps during the experiment process.
D)Safety issues do not need to be considered until you begin an experiment.
11.
Which of these is true?
A)Sometimes experimental data do not support the hypothesis.
B)A successful experiment happens only when it gives the results you predicted.
C)Most hypotheses are wrong.
D)Your experiment is a failure if the data do not support your hypothesis.
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