VOCABULARY Scientists use scientific method to pursue their curiosity about nature. Below is a list of terms that
relate to the use of scientific method. Each sentence that follows is an example of one of these
terms. Indicate which term is described by each of the sentences. The first one has been done for
you.
experiment
hypothesis scientific method
data
scientific theory
observations controlled experiment variable
scientific law questions
1. The water in a lake is more acidic than it was
previously.
2. After Copernicus proposed his idea of the solar
system, scientists thought it was a better expla-
nation for their planetary observations.
3. Guessing that oxides cause acid rain, the scien-
tists began their experiment.
4. In one experiment, the pH level of water was the
only condition that was changed.
5. The findings showed that acid rain occurred only
in certain areas and only under certain condi-
tions.
6. Scientists compared the results of the control
group to the results of the group with the variable.
7. After repeated tests and observations, the theory
was proved to be correct without fail.
8. Scientific conclusions are formed through the
orderly use of scientific skills.
9. Scientists decided to test their hypothesis that
acid rain may damage plants.
10. Scientists wondered if the water from rain and
snow was the source of the acid.