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