Experimental Design

What do scientists call the educated guess made before an experiment?

• Variable

• Constant

• Hypothesis

What is a constant in an experiment?

• The thing the scientist changes in an experiment

• The Result

• The things that you keep the same in an experiment

What are the constants in Mr. G's experiment?

• The type of cup

• The amount of water

• the amount of salt

• The shape of the cup

What is a test (independent) variable?

• The variable a scientist changes in an experiment

• The result measured at the end of the experiment

• The variables the scientist keeps the same

What is the test (independent) variable in Mr. G's experiment?

• The amount of water in each cup

• The type of egg

• The amount of salt put in each cup

How many test variables should a controlled experiment have?

• 1

• More than 1

What do we call the group that is under "normal" conditions? (not exposed to the test variable)

• Control Group

• Experimental Group

• Constant

• Test Variable

What do you think the control group would be in Mr. G's experiment?

• Cup with 2 tablespoons of salt

• Cup with 1 tablespoon of salt

• Cup with no salt added

What is an experimental group?

• A group that are kept under "normal" conditions (not exposed to the test variable)

• A group that are kept under "abnormal" conditions (exposed to the test variable)

• The result of the experiment

What do scientists call the result that we measure at the end of the experiment?

• The test (independent) variable

• The outcome (dependent) variable

• The controlled variable (constant)

• The control group