Waves_for_Grade_8.pptx tutorial for grade 8

Grade 8 tutorial summary on waves

1. Waves Introduction to Waves for Grade 8

2. What are Waves? Waves are disturbances that transfer energy from one place to another. Waves do not transfer matter, only energy.

3. Types of Waves 1. Mechanical Waves: Require a medium to travel (e.g., sound waves) 2. Electromagnetic Waves: Do not require a medium (e.g., light waves, radio waves)

4. Properties of Waves 1. Wavelength: Distance between two consecutive crests or troughs 2. Frequency: Number of waves that pass a point in one second 3. Amplitude: Maximum displacement of a wave from its rest position 4. Speed: How fast the wave travels through a medium

5. Reflection, Refraction, and Diffraction Reflection: Waves bouncing off a surface (e.g., echo) Refraction: Waves changing direction when they pass through different mediums Diffraction: Waves spreading out after passing through a narrow opening