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Grade 4 Science · World 7: Sound Studio · Level 46
High and Low
Predict how faster and slower vibrations change pitch (tight, short, thin strings are higher).
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 46
- Pitch is how high or low a sound is. A bird's tweet has a high pitch, and a big truck's rumble has a low pitch.
- Pitch depends on how fast something vibrates. Faster vibrations make higher pitches. Waves packed together show faster vibrations.
- Tight strings vibrate faster than loose ones, so tightening a string raises its pitch.
- Short strings vibrate faster than long ones. That's why a guitar player presses a string down to play higher.
- Thin strings vibrate faster than thick ones. Try it with a grown-up: stretch rubber bands of different sizes over a box and pluck them.
Georgia Standards of Excellence in Science:
- S4P2.a — Plan and carry out an investigation utilizing everyday objects to produce sound and predict the effects of changing the strength or speed of vibrations.