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Welcome to Big Ideas in Science Unit 3 Seminar!. Please feel free to chat amongst yourselves until we begin at the top of the hour. Seminar Agenda. Icebreaker Unit 4 DB Preview Waves 101 Grandma Pauline & her microwave Questions & Answers. Any questions?. Ice Breaker!.
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Welcome to Big Ideas in ScienceUnit 3 Seminar! Please feel free to chat amongst yourselves until we begin at the top of the hour.
Seminar Agenda • Icebreaker • Unit 4 DB Preview • Waves 101 • Grandma Pauline & her microwave • Questions & Answers
Ice Breaker! What are some of your favorite books?
Unit 4 Discussion Board Preview • For the Unit 4 DB assignment, you will be assigned to a team and must collaborate on the first part of the discussion. • Teams will be formed and posted in an Announcement • I will start a thread for each team within the Unit 4 Discussion Board. This is where you should post your information. • There are 3 components to this discussion, be sure to complete them all • Cite your resources! • Be sure to collaborate with your team prior to the start of Unit 4 by e-mail, AIM, or phone to divide up the work.
Waves 101 • A wave is a disturbance that travels through space and transports energy. • Some waves, electromagnetic waves (light for example), can travel through a vacuum. • Other waves, known as mechanical waves, can only travel through a medium such as a solid, liquid, or gas. • Although a wave may transport energy from one place to another, it does not transport mass.
Waves 101 • Visual representation of waves: sinusoidal shape (S-shape) • The points of maximum displacement in the positive or negative direction are known as the "crests" and "troughs" of a wave.
Waves 101 • Three important characteristics that define waves • Amplitude: the measure of the maximum disturbance • Related to the amount of energy carried by the wave • Wavelength:the length of one complete wave cycle, from crest to crest • Different types of light have different wavelengths. • Frequency:a measure of the number of wave cycles that occur in a given amount of time • Frequency and Wavelength are closely related: the shorter the wavelength, the higher its frequency
Grandma Pauline & her Microwave 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!”
Grandma Pauline & her Microwave What can we tell Grandma Pauline to help her understand this new technology?
Grandma Pauline & her Microwave What’s the difference between the waves that are used in a microwave oven and the dangerous nuclear radiation she fears?
Grandma Pauline & her Microwave How will this image help?
Grandma Pauline & her Microwave 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? Why?
Grandma Pauline & her Microwave If radio waves and microwaves are both electromagnetic waves, why can’t Grandma Pauline listen to KBAQ-FM on her new oven?
Grandma Pauline & her Microwave What might be some negative impacts of using Grandma Pauline’s new microwave oven?