Waves, Sound, and Light.

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Presentation transcript:

Waves, Sound, and Light

Key Ideas I will understand the relationship among waves, energy and matter. I will be able to describe the difference between transverse waves and compressional waves.

Vocab Words ( You will need to know these to be successful in 8th Grade and High School) Wave Transverse Wave Electromagnetic Wave Mechanical Wave Compressional Wave

So, what exactly is a wave? In your own words, write down what you think waves are here. Give it a shot and see how you do…. NO DON’T ASK ANYONE ELSE!!!! You are on your own!!!

Rhythmic disturbances that carry energy without carrying matter are called waves. What is energy? Ability to do work. Work: movement of an object over a distance. The energy (of the people standing up) is transferred around the stadium, but the people themselves do not move very far at all.

Molecules transport wave energy without themselves moving, like a line of people passing a ball.

Mechanical waves use matter to transfer energy. Transverse Wave – wave enegy causes matter in the medium to move up and down or back and forth at right to the wave angles

Example of mediums: Gases – Air Liquids – Water Solids – slinky Medium - is a surrounding or enveloping substance. Example of mediums: Gases – Air Liquids – Water Solids – slinky

What is the medium in the picture below? Compressional waves – Matter in the medium moves forward and backward in the same direction as the wave What is the medium in the picture below?

Sound Waves – Compressional waves caused by colliding air molecules. Electromagnetic Waves – Transfer energy without transferring matter; produced by electrically charged particles.

Whiteboard Time 1) What are the different types of waves? 3) Draw a compressional wave 4) What is a medium. List 3 examples of mediums 5) Can a transverse wave be found in space? 2) Draw a transverse wave