8th Grade Chapter 1 Test

A scientific ______ is a well-tested explanation for a wide range of observations or experimental results. It can change.

• inquiry

• hypothesis

• theory

• law

A statement that describes what scientists expect to happen every time under a particular set of conditions is a ______. It does not change

• scientific inquiry

• scientific hypothesis

• scientific theory

• scientific law

Which is NOT a step in the scientific method?

• Make observation
• Form a theory
• Collect data
• Form a hypothesis

A testable explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact

This variable in an experiment is the one being changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

Testing a hypothesis often involves a(n):

• answer
• experiment
• problem
• safety check

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

A possible explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact