80
Lesson 80 of 84 · Waves
ExperimentThe Electromagnetic Spectrum (Part 4)
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
- string
- cups
- aluminum foil
- ruler
- markers
Safety First
- Do not look directly at the sun or bright lights.
Steps
Step 1 — Read
Review the background information on Waves 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 3What determines the pitch of a sound?