What makes a toy car roll further: a steep hill or a gentle one? Hands up your guess.

Two words for today. A force is a push or a pull that changes how something moves, like the push that sends a toy car. A ramp can also give the car a stronger start down the slope. Compare means we try two versions and notice how the results differ.

Here is our question today: does a higher ramp make a toy car roll further than a lower ramp?

Say your prediction out loud and one reason why.

Before we use our real ramps, we will practise one quick compare on the board. This practice uses the slope too, just like your real test with the ramps.

When the second run finishes, look at the two stop markers on the tiles. Those markers show how far each run went. What did our change do?

Put the start mark on the floor at the bottom of the ramp. Measure only along the floor from that mark to where the car stops.

Try A

1. Set up the ramp and the car on your station.
2. Roll the car away from feet and keep the lane clear.
3. Mark where the car stops with tape or a finger.
4. Measure from the start mark to the stop mark in centimetres. Write that number down straight away.

Try B

1. Change only the one thing in our class question.
2. Roll, mark and measure the same way as Try A.
3. Write the second number beside the first before you leave the station.