This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group

• control group

• data

• variables

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

• data

• theory

• hypothesis

• fact

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

• dependent variable

• independent variable

• data

• control group

 

What step does every scientific experiment begin with?

• hypothesis

• question/problem

• procedures

• conclusion

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

• The type of plant

• The amount of sunlight

• The type of music

• The type of liquid

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

• type of day exercise occurs

Observations made during an experiment are called:

• data

• problems

• conclusions

• questions

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?

• Type of plant, amount of music, and sunlight

• Water, apple juice, milk

• Plant growth

All hypothesis are accepted.

• True

• False