Electric Circuits (Part 2)

What You'll Learn

Energy can be transformed from one form to another but cannot be created or destroyed. A light bulb converts electrical energy into light and heat energy.

Key Words

kinetic
potential

Materials Needed

rubber bands
blocks
spring scale
stopwatch

Safety First

Use materials only as directed in the experiment.
Keep small objects away from young children.

Steps

Step 1 — Read

Read the introduction and identify the main idea of this lesson.

Step 2 — Do

Set up a pendulum with string and a washer. Change the string length and count swings per minute for each. Graph your results.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Check Your Understanding

Question 1

1 of 3

What is needed for a simple electric circuit?