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10/7 & 10/8 - 7 th Grade Agenda. Collect: Reading & Note Taking : p. 35- 36 Pass back HW & Test Transparent, Translucent and Opaque Disappearing Water trick Video: Science in Action Waves Equipment Lab Passback Graded HW & Test Class Reading: p. 44 - 50

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10 7 10 8 7 th grade agenda

10/7 & 10/8 - 7th Grade Agenda

Collect: Reading & Note Taking : p. 35- 36

Pass back HW & Test

Transparent, Translucent and Opaque

Disappearing Water trick

Video: Science in Action Waves

Equipment Lab

Passback Graded HW & Test

Class Reading: p. 44 - 50

HW: Reading & Notetaking : p.37 - 40


Daily reflection
Daily Reflection

  • Prompt: Give 5 examples of electromagnetic waves. What is the one difference between all the electromagnetic waves? .


Electromagnetic wave
Electromagnetic Wave

  • An electromagnetic wave consists of vibrating electric and magnetic field that move through space at the speed of lig____

ht


What are some examples of electromagnetic waves
What are some examples of electromagnetic waves?

  • Radio Waves

  • TV Signals

  • Microwaves

  • Infrared rays

  • Light

  • Ultraviolet rays

  • X-Ray


How fast do electromagnetic waves travel
How fast do electromagnetic waves travel?

  • It is the fastest thing in the universe

  • 300,000 km per second

  • 186,000 miles per second

  • It takes 8 minutes for light to travel from the sun to the earth

  • It takes 3 million years for light to travel from the nearest galaxy (andromeda) to the earth



How do we use radio waves microwaves
How do we use Radio Waves & Microwaves?

  • Radio & TV signals

  • Microwave Oven

  • Radar

  • MRI

  • Cell phone


Using microwaves
Using Microwaves

  • Why do you see sparks you put metal objects in a microwave?

  • Because of the build up of electrical energy in the metal

  • The long wave length of Microwaves can pass right through glass and plastic. That is why microwaves do not heat glass and plastic containers.


Cell phone towers
Cell phone towers

  • These towers are placed 1 -2 miles apart in a city

  • They use M______wave to communicate with cell phones

  • They can be used to locate the loc_______ of the caller.

icro

ation


How do we use infrared rays
How do we use Infrared Rays?

  • Conventional Oven

  • Heat Lamps

  • Thermograms



Transparent materials
Transparent Materials electromagnetic spectrum

  • Transparent material trans_____ most of the light that strike it.

mit


Translucent materials
Translucent Materials electromagnetic spectrum

  • A translucent material sca____ light as it passes through, just as smoke, fog, and clouds scatter light as it passes through the air.

tters


Opaque materials
Opaque Materials electromagnetic spectrum

  • An opaque material refl_____ or absorbs all of the light that strikes it.

ects


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