SC300 Unit Three Jamie Gotto

Agenda Welcome and Introduction 1.Electromagnetic Waves a.Infrared/Microwaves b.Visible light c.Questions 2.Unit 3 overview 3.Q&A

What are electromagnetic waves? Forms of energy emitted and absorbed by charged particles Exhibit wave-like behavior as they travel through space Electric fields: make electric charges attract or repel each other (protons + and electrons -) Magnetic fields: cause magnetic forces Changing electric fields cause magnetic fields and vice versa -This oscillation forms the WAVE

Electromagnetic Spectrum ID: SC R Peaks + Valleys - Wavelength- distance between 2 peaks Frequency- number of peaks per second Higher frequency = higher energy = can damage cells electromagnetic-spectrum-a36021

Infrared and Microwaves Skim through these sites and report to the class 1 interesting fact you learned. (type in text box) ml

Visible Light Skim through these sites and report to the class 1 interesting fact you learned. (type in text box) l

Questions 1.Your Grandma Pauline has just won a microwave oven in a radio contest. When it arrives at her house, it sits on her counter, unused, for a month. One afternoon, when you visit her, she tells you that she is afraid to use it because "If I stand too close, I'll get radiated!" Explain to your Grandma the difference between the waves that are used in a microwave oven and the dangerous nuclear radiation she fears. 2.Use this spooky infrared picture of a cat: to give some proof to Grandma Pauline that a cat's nose is always cold.

Questions- Continued 3.If you took a similar infrared photo of your body, what parts would you expect to show up as brightest orange? What parts would be blue? Explain. 4.After Grandma Pauline starts thinking about electromagnetic waves, she asks you to explain why, if radio waves and microwaves are both electromagnetic waves, you believe she can’t listen to KROQ- FM on her new oven.

Unit 3 Overview

Graded Items Discussion -Science and Revision -Scientific Discoveries *Remember to use the scientific method in your submissions.

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