Waves Matter Matter is made up of particles

Waves

Matter • Matter is made up of particles – Air is made up on molecules – Water is made up of…. . – Soil is made up of….

Energy • Energy moves through matter. – A wave can be a periodic movement of energy through matter. – A pulse is a single disturbance moving through a medium from one location to another location. – A wave results from a repeated disturbance.

What about here? Where is the energy started? • • Sound can hurt your ears. Earthquake waves Snaky moves energy. Ultraviolet can cause skin damage. Ultrasound can shatter kidney stones. X-rays can damage cells. Lasers can cut steel.

MEDIUM • Waves must have a medium to exist! • The medium “carries” the wave. • A medium is a substance or material. • A series of interconnected or interacting particles.

PHENOMENAL! • Waves are an energy transport phenomenon. Energy changes the movement of particles. • Particles vibrate!

Three Types of Waves • Longitudinal: • Transverse: • Surface

PROPERTIES • ACTIVITY: – Use a slinky to • Draw what you see • Identify and label all the parts of the wave! Crest Amplitude Trough Line of Origin Wave Height Wave Length

WAVE LENGTH The distance between the crest of one wave and the crest of the next.

Line of Origin/ Normal Rest When the wave is at rest, or at the starting position.

FREQUENCY The number of COMPLETE waves that pass a given point in a certain amount of time. Let’s practice….

MEDIA • Waves travel through different media. • Let’s list some…. . Solid, Liquid, Gas, No-Gas Why can’t sound travel through space? How do astronauts communicate?

FORMS OF WAVES • There are many different waves! – – – Seismic (earthquake) Sound Light EM Water And on and on…. . Like our examples from the beginning of this afternoon!

THE ELECTROMAGNETIC SPECTRUM • HUGE! • MAIN CONCEPTS? • LOTS Of RESOURCES TO USE

LIGHT • Inspecting the spectrum • Visible Light Waves on EM spectrum