📚 Topic Summary
Sound waves are vibrations that travel through a medium (like air, water, or solids), carrying energy from one place to another. But here's the cool part: the particles in that medium don't travel *with* the wave. Instead, they vibrate back and forth around their original positions, bumping into each other like tiny dancers! This bumping passes the energy along, creating the sound wave we hear. Think of it like doing the wave at a sports game – people stand up and sit down in place, but the wave itself moves around the stadium. The frequency of these vibrations determines the pitch of the sound, and the amplitude (how far the particles move) determines the loudness.
🧪 Part A: Vocabulary
Match the term with its correct definition:
| Term |
Definition |
| 1. Amplitude |
A. The number of vibrations per second, measured in Hertz (Hz). |
| 2. Frequency |
B. A disturbance that transfers energy through a medium. |
| 3. Sound Wave |
C. The maximum displacement of a particle from its resting position. |
| 4. Medium |
D. The high point of a wave. |
| 5. Crest |
E. A substance through which a wave can travel. |
(Answers: 1-C, 2-A, 3-B, 4-E, 5-D)
✍️ Part B: Fill in the Blanks
Fill in the missing words in the following paragraph:
Sound waves are caused by __________. They travel through a __________, such as air or water. The particles in the medium __________ but do not travel with the wave. The __________ of the wave determines how loud the sound is.
(Answers: vibrations, medium, vibrate, amplitude)
🤔 Part C: Critical Thinking
Imagine you are underwater. Would you hear sounds differently than you would on land? Why or why not?