Ppt unit 8
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This document discusses different types of sounds including pleasant and unpleasant sounds as well as noises. It explores how sounds can be loud or quiet, high or low pitched, and can travel through air, solids, and water. The document also examines machines that make noise and transmit sound.
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Ppt unit 8
- 1. Unit 8. It’s a noisy world
- 3. Objects which make no sounds
- 4. Objects which make sounds
- 8. loud quiet
- 9. high low
- 10. Sounds that are bad for your health
- 12. Sounds can travel through air
- 13. Sounds can travel through solids
- 14. Sounds can travel through water
- 15. Machines that make noise
- 16. Machines that transmit sound
- 17. The end