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Scientific Method (part 1)
Test Description: Students study for Unit Test 1 on the Scientific Method
Instructions: Answer all questions to get your test result.
1) A student reported that a wilted stalk of celery became crisp when placed in a container of ice water. The student’s statement was based on
A
a hypothesis
B
a conclusion
C
an observation
D
a deduction
2) Which of the following are qualities of any good scientific hypothesis?
A
It can be tested and proven true
B
it can be tested and may be proven either true or false
C
it can be tested and proven false
D
it produces numerical data
3) Which of the following is the best description of a control for an experiment?
A
the control group is exposed to only one variable rather than several
B
the control group is matched with the experimental group except for the one experimental variable
C
the control group is kept in an unchanging environment
D
the control is left alone by those experimenting
4) Why is it important than an experiment include a control group?
A
Without a control group, there is no basis for knowing if a particular result is due to the variable being tested
B
the control group provides a backup plan of experimental subjects
C
a control group assures that an experiment will be able to be repeated
D
the researcher is control of the control group and therefore predetermines the results
5) When applying the process of science, which of these is tested?
A
a prediction
B
a conclusion
C
an observation
D
a question
6) In presenting data for an experiment, a group of students show that most of their measurements fall in a straight diagonal line on the graph. However, two of their data points are outliers. What should the students do?
A
Change the details of the experiment until they can obtain the expected results
B
Average several trials and therefore rule out the improbable results
C
Show all results obtained and then explore the reasons for these outliers
D
Do not show these points, but write a footnote that the graph represents the correct data
7) A controlled experiment is one which
A
there are at least two groups, one differing from the other by two or more variables
B
there are at least two groups, one of which does not receive the experimental treatment
C
there is one group for which the scientist controls all variables
D
is conducted at a slow pace to guarantee the scientist can carefully observe all reactions and process all experimental data
8) A hypothesis states that wrinkled seeds will have lower germination than smooth seeds. Results support the hypothesis. However, only green wrinkled seeds germinated. Yellow wrinkled seeds did not. The experiment is
A
flawed because there were different colored seeds
B
valid because the results support the hypothesis
C
valid because the hypothesis was testable
D
flawed because there was no seedless control
9) What is the primary reason for including a control in the design of an experiment?
A
to provide more data so that one can analyze the statistics carefully
B
to test the effect of more than one variable
C
to ensure that the results obtained are due to a difference in only one variable
D
to demonstrate in what way the experiment was performed incorrectly
10) Which of the following questions can be investigated scientifically?
A
Does tanning harm the skin?
B
Is experimenting on white mice right or wrong?
C
Who is the most famous scientist in the world?
D
Should scientists make as much money as athletes?
*select an answer for all questions
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