You are to create as many waves as possible without using your hands. You can use various items at your desk to create a wave but remember you can’t use your hands. Let’s talk about your observation!

There are two types of energy, kinetic and potential, and it comes in many forms:  Sound- kinetic  Thermal-kinetic  Chemical-potential  Electrical- kinetic  Radiant/ Light-kinetic  Mechanical- kinetic Potential- when matter has stored energy that is ready to be used but is not being used. Kinetic- the release of potential energy; matter in motion

A wave is the ability to move or cause change in matter.

A disturbance that transfers energy. Some types of waves require a medium (solid, liquid, or gas) to travel through while others do not. A medium is a substance or material that carries a wave (solid, liquid, gas)

 A medium is a substance or material that carries a wave (solid, liquid, gas)

Mechanical Wave Electromagnetic Wave Transverse Wave Longitudinal Wave

Mechanical Waves  travel through matter  Sound waves  water waves Electromagnetic Waves  travel through empty space, as well as through matter  Visible light,  microwaves,  X-rays, and  radio waves

 Object in motion will keep moving at the same speed and in the same direction unless force change their motion

 Require a type of matter to travel through  Medium- (solid, liquid, gas)  These waves pass on energy  Waves can create sound  Sound can travel through air, water, or solids  Can not travel through a vacuum( no air)

 Waves that can travel through a vacuum  Empty Space  They do not need a medium or matter  Examples:  Light wave  Radio waves  X-rays

Waves Activity #1  Since waves are usually unseen, we are going to make these waves ourselves using Slinkys.  Are we creating mechanical waves or electromagnetic waves? Explain your reasoning.  What did you observe?

 The wave is moving left to right, while the disturbance moves up and down  The disturbance moves perpendicular to the direction of the wave  Transverse waves create light

The peak, or highest point of a transverse wave.

The valley, or lowest point, of a transverse wave.

The distance from any point on one wave to a corresponding point on an adjacent wave. (ex. Crest to crest or trough to trough)

Tie a rope to the a chair and create long and short wavelengths. Question: 1. What do you notice about the frequency? 2. What happens when you move it very fast, in an up and down movement? 3. What happens when you move it slowly in an up and down movement? 4. Does frequency increase or decrease when wavelength is reduced?

The number of oscillations produced in a certain amount of time. The greater the number of oscillations per second, the higher the frequency. The higher the frequency, the more energy carried by the wave. High Energy Low Energy

 How do you know?

Transverse waves produce light Longitudinal waves produce sound

 The disturbance moves in the same direction as the wave  These waves create sound  Examples:  Sound waves  Waves moving through a stretched out slinky or spring

Directions  With the slinky, create transverse wave with your group.  Now create a longitudinal wave with your group Complete in Notebook Compare and Contrast the two waves you created with your group. Record your observations:  See  Hear  Feel

 Earthquakes develop in the crust of the earth.  The inner part of the earth contains massive energy.  Some of the energy escapes through cracks within the earth’s surface.  Waves are what cause us to experience earthquakes

 Seismic wave is an elastic wave generated by an impulse such as an earthquake or an explosion  P-Waves:  Also called compressional wave  Is seismic body wave that shakes the groud  S-Waves:  Also called shear wave  Is a seismic body wave that shakes the ground  L-Waves: