Question to be tested:

Does warm water or cold water dissolve salt faster?

Which is the dependent variable?

Question to be tested:

Does warm water or cold water dissolve salt faster?

Which is the controlled variable?

Question to be tested:

Which brand of laundry detergent works better to remove grass stain?

Which is the independent variable?

Question to be tested:

Which brand of laundry detergent works better to remove grass stain?

Which is the dependent variable?

Question to be tested:

Which brand of laundry detergent works better to remove grass stain?

Which is the controlled variable?

Question to be tested:

Do tree frogs jump farther than blue dart frogs?

Which is the independent variable?

Question to be tested:

Do tree frogs jump farther than blue dart frogs?

Which is the dependent variable?

Question to be tested:

Do tree frogs jump farther than blue dart frogs?

Which is the controlled variable?

Question to be tested:

Do sunflowers grow taller in direct sunlight or partial sunlight?

Which is the independent variable?

Question to be tested:

Do sunflowers grow taller in direct sunlight or partial sunlight?

Which is the dependent variable?

Question to be tested:

Do sunflowers grow taller in direct sunlight or partial sunlight?

Which is the controlled variable?

Question to be tested:

Does the amount of water in a pot affect how fast it boils?

Which is the independent variable?

Question to be tested:

Does the amount of water in a pot affect how fast it boils?

Which is the dependent variable?

Question to be tested:

Does the amount of water in a pot affect how fast it boils?

Which is the controlled variable?

Question to be tested:

Which type of ball rolls down a 3 - foot ramp the fastest?

Which is the dependent variable?

Question to be tested:

Which type of ball rolls down a 3 - foot ramp the fastest?

Which is the independent variable

Question to be tested:

Which type of ball rolls down a 3 - foot ramp the fastest?

Which is the controlled variable

Different groups of 7th graders were timed on a math test. One group was allowed to use calculators and one was not. What was most likely being tested in this investigation?

Two students wanted to find out which of their toy race cars would go the farthest. They let each car roll down a ramp and the measured how far the cars rolled.

Which of these should e held constant if they want a fair test of their cars?