This is a discussion for the Hey, Stop That Car! (An exploration of time, distance, velocity, and mass) Experiment. Feel free to connect with the Learning Team here, or to discuss experiment tips, ask questions, leave comments or suggest experiment variations here.
Toy Car
Weights
Ramp Length
Ramp Incline
String Length
Ramp Material
Q: Which one item in the list above is our variable?
A: The Weights
Q: How do you know?
A: Because for our experiment we are changing or varying the amount of weight attached to the car.
Q: Which 5 items from the list above are the constants?
A: The toy car, ramp length, ramp incline, string length, and ramp material are our constants.
Q: How do you know?
A: We know that the toy car, ramp length, ramp incline, string length and ramp materials are our constants because those are the parts of the experiment we are keeping the same with every test.