The Electromagnetic Spectrum (Part 2)

What You'll Learn

Sound is a vibration that travels through matter as a wave. It cannot travel through a vacuum. Sound travels fastest through solids and slowest through gases.

Key Words

constraint
criteria

Materials Needed

cardboard
tape
scissors
straws
paper clips

Safety First

Dispose of materials properly after the experiment.

Steps

Step 1 — Read

Review the background information on Data and Evidence before starting.

Step 2 — Do

Design an experiment to test a hypothesis. Identify your independent variable, dependent variable, and controls. Run the experiment and present results.

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 determines the pitch of a sound?