- How do you define
**speed**? Write your definition in your Science journal. How does speed change along a roller coaster track? - How do you define
**energy**? Write your definition in your Science journal. How does energy change along a roller coaster track?

4-Click here. Then click PLAY on the graphic. Play it several times. Observe the car along the track and the graphic of potential and kinetic energy.

5-Did you notice a**relationship between the speed and energy** of the car along the track? Was there any **evidence** that speed and energy are related?

5-Did you notice a

Try This Experiment

For the Science Fair, a group of 4th graders, set out to study how the speed of a ball differed if it began from different points rolling down a ramp. The started a golf ball at point A and timed it to roll (without pushing it) to the finish 3 times. They did the same with ball starting at point B, then they started it from point C, then point D. From each point they rolled it 3 times.

Sketch the ramp above in your Science journal.

Use a ruler to make the chart in your Science journal.

Fill in the chart with the info here. The distance from point A to the finish is 7.0m, from B to finish is 6.5m, from C to finish is 6.0m, and from D to finish is 5.5m. From point A, the times were 14.0s, 14.2s, and 14.1s. From point B to finish the times were 11.1s, 11.0s, 11.2s. From point C to finish the times were

]]>Use a ruler to make the chart in your Science journal.

Fill in the chart with the info here. The distance from point A to the finish is 7.0m, from B to finish is 6.5m, from C to finish is 6.0m, and from D to finish is 5.5m. From point A, the times were 14.0s, 14.2s, and 14.1s. From point B to finish the times were 11.1s, 11.0s, 11.2s. From point C to finish the times were