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Force and Energy - Gravity and Sound | Science and Technology

  Change Class Grade 5 Science and Technology
Science and Technology

GRADE 5 SCIENCE AND TECHNOLOGY REVISION QUESTIONS

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Force: Gravity

- Gravity is a force that pulls objects downwards towards the centre of the earth.
- When objects are thrown, they are released from a high point.

Demonstrating Gravity

- Although we cannot see gravity, we can demonstrate its existence.
- While standing, pick a book and hold it high. Then release it.
As expected, the book will fall.
Demonstrating Gravity

Energy: Sound

- Sound is produced when objects vibrate.
- The object can be made to vibrate by:
  • Blowing
  • Plucking
  • Hitting
A Bell - It produces sound when shaken

Classifying sound

- Loud sound is produced when objects are hit hard with high intensity.
- Soft sound is low in volume.
- The soft sound is produced when an object is hit slightly.

Effects of sound pollution

- The following are some of the effects of sound pollution:
  • Causes irritability.
  • Affects the hearing as it can affect the ear drum.
  • Makes one feel uncomfortable.



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