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Scientific Method
Test Description: Independent and Dependent variables, Control group, Experimental group and Constants
Instructions: Answer all questions to get your test result.
1) Which statement describes the best procedure to determine if a vaccine for a disease in a certain bird species is effective?
A
Vaccinate 100 birds and expose all 100 to the disease.
B
Vaccinate 100 birds and expose only 50 of them to the disease.
C
vaccinate 50 birds, do not vaccinate 50 other birds, and expose all 100 birds to the disease.
D
Vaccinate 50 birds, do not vaccinate 50 other birds. Expose only the vaccinated birds to the disease
2) A student is investigating the effect of different environmental factors on the growth of a certain species of bean plant. Which factor would NOT function as a variable?
A
Species of bean plant
B
Atmospheric temperature
C
Soil moisture content
D
Amount of light
3) A scientist performed an experiment to see the effects of a scary movie on the heart rate of people watching the movie. In this experiment, the dependent variable is:
A
the scientist
B
the scary movie
C
the control
D
the heart rate
4) Diagrams, tables and graphs are used by scientists mainly to:
A
test a hypothesis
B
design a research plan for an experiment
C
predict the independent variable
D
organize data
5) A biologist reports a new discovery based on experimental results. If the experiment results are valid, biologists in other laboratories should be able to:
A
repeat the same experiment and obtain the same results
B
repeat the same experiment with a different variable and obtain the same results
C
perform the same experiment and obtain different results
D
perform the same experiment under different experimental conditions and obtain the same results
6) Conclusions based on an experiment are most likely to be accepted when:
A
they are derived from investigations having many experimental variables
B
scientists agree that only one hypothesis has been tested
C
hypotheses are based on one experimental design
D
they are consistent with experimental data and observations
7) Which statement best describes a hypothesis?
A
A hypothesis serves as a basis for determining what data to collect when designing an experiment
B
The facts collected from an experiment are written in the form of a hypothesis
C
The conclusion drawn from the results of an experiment is part of a hypothesis
D
A hypothesis is the process of making careful observations
8) Which statement about the use of independent variables in controlled experiments is correct?
A
The independent variables must involve time
B
A different independent variable must be used each time an experiment is repeated
C
The independent variables state the problem being tested
D
Only one independent variable is used for each experiment
9) The development of an experimental research plan should NOT include a:
A
procedure for the use of technologies needed for the experiment
B
list of safety precautions for the experiment
C
conclusion based on data expected to be collected in the experiment
D
list of equipment needed for conducting the experiment
10) The first trial of a controlled experiment allows a scientist to isolate and test:
A
a single variable
B
several variables
C
a logical conclusion
D
a variety of information
*select an answer for all questions
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