1. Good Morning! Have out on your desk, “How do Waves Transfer Energy?” In your notebook, answer the following questions: 1. Name two ways you can apply force to a soccer ball. 2. Name two ways the force you apply can change the motion of the soccer ball.

3. Waves A wave is a disturbance that transfers energy from one place to another. A medium is any substance that a wave moves through. Example 1: Water is the medium for an ocean wave Example 2: The ground is the medium for an earthquake wave.

4. Waves Waves that transfer energy through matter are known as mechanical waves. Example of mechanical waves: water, the ground, a rope, air = all made up of matter

5. Waves In a transverse wave, the direction in which the wave travels is perpendicular to the direction of the disturbance. Example of transverse wave: Snapping a rope Direction of Disturbance Direction of Wave

6. In a longitudinal wave, the wave travels in the same direction as the disturbance. Example of longitudinal wave: the coils in a spring, slinky Direction of Disturbance Direction of Wave

7. Wave Properties Crest – Highest point, or peak,of wave. Trough – Lowest point, or valley, of a wave. Amplitude – Distance between the middle of a wave and a crest. Wavelength – The distance from one wave crest to the very next crest. Frequency – The number of waves passing a fixed point in a certain amount of time.