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PS-1.4; Design Of Scientific Investigations
Test Description: Students will identify steps in design of a scientific investigation and understand the reason for performing experiments.
Instructions: Answer all questions to get your test result.
1) The main reason scientists design and conduct experiments is to
A
support their conclusions.
B
test hypotheses.
C
keep their grant money.
D
help mankind.
2) A scientific investigation attempts to answer a question about
A
good and bad.
B
how knowledge can best be used to serve the needs of mankind.
C
philosophical issues.
D
the relationship between 2 variables; if there is a predictable effect of one variable on another.
3) In order to write a hypothesis for an experiment, the investigator must first
A
choose an experimental procedure.
B
identify the independent and dependent variables.
C
decide what the outcome of the experiment will be.
D
decide what materials he has to work with.
4) An experimenter should
A
run only one trial of the experiment.
B
run only a few trials of the experiment and stop when he gets the results he expected.
C
run the least amount of trials of the experiment possible, to save money.
D
conduct repeated trials of his experiment.
5) Planning how to set up data tables and what kind of graph or analysis of data to do
A
should be done before beginning the experiment.
B
is not a step in experimental design.
C
is done after all data has been gathered.
D
can't be done until data is available.
6) A control group
A
is used to see if the change in the DV is due to the IV or to some other factor.
B
is the same thing as the controlled variables
C
must always be used in a controlled experiment
D
is treated differently from the experimental group, except the IV is still applied.
7) The conclusion statement of the experiment
A
should either be "the data support the hypothesis," or "the data do not support the hypothesis."
B
does not need to refer to the data if the data don't agree with the experimenter's ideas.
C
doesn't always need to be logical; sometimes creative thinking is acceptable.
D
does not need to be based on analysis of the data if the data do not agree with the hypothesis.
8) Researching information related to the investigation
A
is not always a needed step in designing an experiment.
B
tends to limit the researcher's creativity and is never a good idea.
C
should be done after data collection but before writing a conclusion.
D
should always be done in the beginning stages of designing an experiment.
9) Stating the purpose of a scientific investigation
A
should be saved for last, after you have done the experiment and know the results.
B
isn't a needed step in experimental design.
C
should be done in the form of a testable question or problem statement.
D
is really a form of the experiment's conclusion.
10) The controlled variables in an experiment
A
include the IV and DV since the experimenter controls their values.
B
include the IV, but not the DV.
C
don't have to be the same for every trial of the experiment.
D
are the variables that are held constant (are the same) during an experiment.
*select an answer for all questions
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