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What is a factor that is measured for change in an experiment?

• control
• constant
• independent variable
• dependent variable

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

• Independent
• Dependent
• Control

How many variables should you change in an experiment?

• none
• only 1

• 2 or more
• depends on the type of experiment

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound

The parts of the experiment that must be kept the same.

• Constants
• Independent variable

• Dependent variable

• 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

A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is

• the male alligators
• the incubator
• the gender of the alligator
• the temperature

What makes a good scientific question?

• The question can be answered by yes or no.

• The question can be answered by doing an experiment.

• The question can be answered through extended thought.

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedure or test

• conclusion

How do bats and dolphins use echolocation to determine the distance of an object?

• By analyzing the time it takes for sound waves to bounce back

• By analyzing the intensity of sound waves

• By analyzing the frequency of sound waves

• By analyzing the direction of sound waves