Speed Race
Class 7 Science: motion and time (speed)
Set the speed of two runners, race them over 100 metres and watch the distance-time graph draw itself.
Words to know
- Speed
- How far something goes in one second (or hour).
- Distance
- How far something travels, in metres.
- Time
- How long something takes, in seconds.
- Graph
- A picture of numbers; a steeper line here means faster.
Quick check
Answer 3 questions to check what you learned.
Try at home
Walk 20 steps and ask someone to time you. Then walk fast for the same 20 steps. Speed = distance ÷ time: which was faster, and by how much?