1) What is the independent variable in an experiment? a) A. The variable that stays the same b) B. The variable that is measured c) C. The variable that is changed on purpose d) D. The result of the experiment 2) What is the dependent variable in an experiment? a) A. The variable that you control b) B. The variable that changes on its own c) C. The variable that is kept constant d) D. The variable that is changed on purpose 3) A scientist tests whether the amount of salt in water affects how fast an egg floats. What is the dependent variable? a) A. Amount of salt b) B. Water temperature c) C. How fast the egg floats d) D. Size of the egg 4) A student wants to see if listening to music affects how quickly they can complete a puzzle. What is the independent variable? a) A. The puzzle type b) B. The amount of music c) C. Whether or not music is playing d) D. The time to complete the puzzle 5) In an experiment on plant growth, a student uses different types of soil to see which one helps the plant grow tallest. What is the independent variable?  a) A. Type of soil b) B. Height of the plant c) C. Amount of sunlight d) D. Amount of water

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