Experimental Design

Students used various temperatures of water to see which one dissolved candy faster. 
What was the Independent Variable?

• Amount of Candy
• Amount of Water
• Temperature of Water
• Time for Candy to Dissolve

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The type of variable that you change or manipulate in an experiment. It is what you are testing.

• Independent

• Dependent

• Control

The purpose of the control group is:

• Used for comparisons

• Application of the Independent Variable

• Application both the Independent and Dependent Variables

• The control group serves no purpose

If I water the plant more often, then it will grow taller. Name the independent variable.

• The height of the plant

• The size of the pot

• The amount of water

• The amount of light.

If you were testing how well different dish soaps cleaned grease, the independent variable would be the:

• dish type

• amount of grease

• dish soap type

• grease type

Hypothesis: Increased exposure to sunlight should cause algae to grow more quickly. What is the dependent variable.

• Sunlight

• Growth rate of algae

• The amount of oxygen produced by the algae

• The amount of water in the container used to store the algae

Xavier’s team designed an experiment to answer the following question. How does the surface of a ramp affect how far a toy car rolls?

Which factors should Xavier keep the same in the experiment? (more than one correct response)

• the kind of car

• the height of the ramp

• the surface of the ramp

Xavier’s team designed an experiment to answer the following question. How does the surface of a ramp affect how far a toy car rolls?

Which factor should Xavier change in the experiment?

• the kind of car

• the height of the ramp

• the surface of the ramp

An educated guess that has not been tested.

• law

• theory

• hypothesis

• fact

A summary of the experiment that includes whether hypothesis was supported or not.

• Hypothesis

• Analysis

• Conclusion

• Independent Variable