10/1 - 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 10/2 & 10/3 Reminder: 3 extra credit points for bringing 100% correct Chap1 Self Assessment (from PearsonSuccessNet.com) Due: 10/2 & 10/3
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: What 3 facts that you learned from the video.