🔊
SOUND
- Sound is made by vibrations
- If the vibration stops, the sound stops
- We can sometimes see objects shake
- Drums, rulers, and strings can vibrate
🎵
PITCH
- Pitch means high or low sound
- Faster vibration often sounds higher
- Slower vibration often sounds lower
- Tight or short bands often sound higher
🪵💧💨
SOUND TRAVEL
- Sound can travel through air
- Sound can travel through water
- Sound can travel through solids
- String phones work when vibrations travel
💡
LIGHT
- Light travels in straight lines
- Mirrors can reflect light
- Light helps us send signals too
- Some objects block light
⚠️
No Vibration
No sound is being made
⚠️
Loose String
A sound sender works less clearly
⚠️
Blocked Light
Light cannot pass through
⚠️
No Matter
Sound cannot travel through empty space
🎸 Thin or tight strings often make higher sounds
📞 Cup phones work best when the string is tight
🪵 A table can carry sound because it is a solid
🪞 Mirrors help light bounce where we want it to go
