Stopwatch

What is it?
A stopwatch is a timing tool that measures events in seconds and minutes. It helps us track how long something takes to happen.

Where do I use it?

• Gear Drive – Time how long it takes for gears to complete rotations.
• Infrared Water Dispenser – Record sensor response speed.

Why is it important?
Timing is critical in science and engineering — from rocket launches to machine cycles. With a stopwatch, students can connect time to speed, distance, and efficiency.

STEM Skill Focus

• Practice accurate timing.
• Use data to calculate speed and performance.