The Role of Theories, Laws, Hypotheses, and Models

A(n) __________ is a rule that describes a pattern in nature.

• scientific law

• observation

• hypothesis

• theory

A(n) __________ is a prediction or explanation that can be tested by experimentation.

• hypothesis

• theory

• method

• scientific law

What occurs when the expectations of a scientist change how the results of an experiment are viewed?

• revision

• conclusion

• bias

• data

In an experiment, the condition that is manipulated (changed) by a scientist is the...

• independent variable.

• dependent variable.

• constant.

• control condition.

Why do scientists communicate their results in written reports?

• so other scientists will argue

• because they like to write

• to make scientific models

• so other scientists can repeat their experiments

During an experiment, which factors are observed and measured?

• dependent variables

• theories

• hypotheses

• independent variables

Which is true about a dependent variable in an experiment?

• It is the experimental data.

• It is manipulated by a scientist.

• It never changes during the experiment

• It is not affected by the independent variable

During an experiment, which factors are observed and measured?

• dependent variables

• independent variables

• constants

• hypotheses

Which phrase best describes scientific theories?

• explain few observations

• serve as speculations

• are never proven

• cannot be replaced

Do Laws become Theories or Do Theories become Laws?

• Theories become laws

• Laws become theories

• All answers are Incorrect