Study Hall Work silently at your desk (homework, reading, reviewing notes, drawing) Sit in assigned seats. No Talking.

Warm Up Predict how you could make a slinky move similar to each of the waves above in your notebook: Remember, it’s a prediction…..

Video You Tube Transverse Waves and Longitudinal Waves using a slinky

Wave Categories 2 Basic Categories of Waves: Write EVERYTHING on this slide… Wave Categories 2 Basic Categories of Waves: Mechanical Waves (examples: ocean, seismic, sound, and slinky waves) Requires a medium in which to transport energy from one location to another. Electromagnetic Waves (examples: light and radio waves) Does not require a medium (energy can travel through completely empty space known as a vacuum)

Wave Videos Brain Pop: Waves

Vocabulary Foldable - Waves Demonstrate to the class: Fold hamburger style Fold in half (hot dog fold) Fold each end into center to create 3 boxes Open up = 12 equal boxes!

Vocabulary Waves- a way that different types of energy can travel. Write EVERYTHING on this slide in your foldable boxes… Vocabulary Waves- a way that different types of energy can travel. Medium- a substance or material that carries the wave Matter- anything that has mass and takes up space

Vocabulary Energy- the ability to do work; cause a change in matter Write EVERYTHING on this slide in your foldable boxes… Vocabulary Energy- the ability to do work; cause a change in matter Mechanical wave- requires a medium through which to travel.

Write EVERYTHING on this slide in your foldable boxes… Vocabulary Transverse wave- a wave in which the particles of the medium move perpendicular (or right angled) to the direction of energy flow (example = light waves and surface ocean waves) Longitudinal wave- a wave in which the particles of the medium move parallel (back and forth) along the direction of energy flow (example = sound wave)

Write EVERYTHING on this slide in your foldable boxes… Vocabulary Trough- the bottom or lowest part of a wave, which happens every wavelength. Crest- the top or peak of a wave., which occurs every wavelength. Wavelength- the space between two identical parts of a wave (from a crest to a crest, or a trough to a trough; the length of ONLY 1 wave)

Write EVERYTHING on this slide in your foldable boxes… Vocabulary Amplitude- the height of the wave from the rest position (from equilibrium) to the top of the crest or to the bottom of the trough. Frequency- the number of times a wave passes a point in one second

Homework Using your notes, complete the homework assignment by answering the 3 questions in complete sentences. This is due Wednesday, October 9th at the beginning of class (this will be checked during the warm up) Do not put in notebook until after I grade it!

Handout – Transverse Wave Label the next available page in your notebook: Transverse Wave Handout (number the page and add the entry into your Table of Contents) Fold the handout and glue into your notebook as indicated on the handout

Parts of Transverse Waves Write EVERYTHING on this slide… Parts of Transverse Waves On the back of your handout write this information: (demo to the group) Basic characteristics: Trough Crest Amplitude Wavelength

Transverse Wave Use your notes to label the wave’s crest, trough, wavelength, amplitude, rest position

Handout – Longitudinal Wave Label the next available page in your notebook: Longitudinal Wave Handout (number the page and add the entry into your Table of Contents) Fold the handout and glue into your notebook as indicated on the handout

Parts of Longitudinal Waves Write EVERYTHING on this slide… Parts of Longitudinal Waves On the back of your handout write this information: (demo to the group) Basic Characteristics: Rarefraction Compression

Longitudinal Wave Use your notes to label the wave’s compression and rarefaction

Longitudinal Wave

Wave Illustrations

Flow of energy Refer back to both handouts: 1. draw the flow of energy in both waves using arrows 2. label the flow of energy as either parallel or perpendicular for both waves

Illustration: Energy Transfer in Waves