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Grade 4 Science · World 7: Sound Studio · Level 45
Loud and Soft
Predict how stronger and weaker vibrations change loudness.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 45
- Loudness is how strong or soft a sound is. It depends on how strong the vibrations are.
- Pluck a string gently, and it swings a little. That makes a soft sound.
- Pluck it hard, and it swings much farther. That makes a loud sound.
- We can draw sounds as waves. Taller waves mean stronger vibrations and louder sounds.
- Very loud sounds can hurt your ears, so turn it down and cover up around loud noises.
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.