9/23 - 7th Grade Agenda Learning Objective: Learn about waves and the Electromagnetic Spectrum Collect HW: Reading & Note Taking p.25 – 28 Brain Pop:

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9/23 - 7th Grade Agenda Learning Objective: Learn about waves and the Electromagnetic Spectrum Collect HW: Reading & Note Taking p.25 – 28 Brain Pop: Waves Textbook Reading: p. 38 - 41 HW: Reading & Note Taking p.29 – 32 Reminder: Chap 1 Test on 9/24 & 9/25 Reminder: 3 extra credit points for bringing 100% correct Chap1 Self Assessment (from PearsonSuccessNet.com) Due: 9/26 & 9/27

Daily Reflection Prompt: What is the difference between manipulated and responding variable?

Wave A wave is a disturbance that transfer ene_____ from place to place. Who can give me examples of waves? rgy

Is light a wave? Yes But why?

Picture of Light Wave Image of a pulse of light that is 2.5 billionths of a millionth of a second long

Energy In science, energy is defined as the ability to do wo___. rk

Medium The material through which a wave tra____ is called a medium Who can give me examples of medium? vels

Does Light Waves need a medium? Scientist first thought that Light needed to travel through a medium. So they invented the idea of aether in space. They look for aether in outer space but they found nothing. So, Light Waves can travel without a medium even in a Vacuum of outer space.

Crest gh Hi___ point of a wave is called a crest

Trough ow L___ point of a wave is called a trough

Amplitude imum Amplitude is the max______ distance that the particles of medium carrying the wave move away from their rest positions. Which rope has higher amplitude?

Wavelength The distance between two corresp______ parts of a wave is its wavelength. Which rope has longer wavelength? onding

Frequency Wave frequency is the num_____ of complete waves that pass a given point in a certain amount of time ber

Daily Reflection Prompt: Write 3 facts that you learned from the video.