Renewable Energy Sources

What You'll Learn

A lever is a rigid bar that rotates around a fixed point called a fulcrum. Seesaws, scissors, and bottle openers are all examples of levers that multiply force.

Key Words

power
simple machine

Materials Needed

cardboard
marbles
paper clips
rubber bands

Safety First

Protect your work surface with newspaper or plastic.

Steps

Step 1 — Read

Read and learn: A lever is a rigid bar that rotates around a fixed point called a fulcrum. Seesaws, scissors, and bottle openers are all examples of levers that multiply force.

Step 2 — Do

Conduct the experiment by following the instructions.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis?

Check Your Understanding

Question 1

1 of 3

Which is a renewable energy source?