Sound Waves and Vibrations

What You'll Learn

Waves transfer energy without transferring matter. Transverse waves (like light) vibrate perpendicular to the direction of travel. Longitudinal waves (like sound) vibrate parallel.

Key Words

observation
conclusion

Materials Needed

markers
popsicle sticks
pennies
plastic wrap
cardboard

Safety First

Adult supervision recommended.
Do not taste any materials.
Wear safety goggles when mixing liquids.

Steps

Step 1 — Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 — Do

Build a working anemometer using paper cups and straws. Calibrate it by counting rotations in a known wind speed.

Step 3 — Observe

Note any unexpected results and think about why they happened.

Step 4 — Record

Share your findings with the class or a partner and discuss what you learned.

Check Your Understanding

Question 1

1 of 3

What is the electromagnetic spectrum?