study hall: sharpen your pencils…. find your seat…… work on something quietly at your desk…

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Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

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Page 1: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Study Hall:

Sharpen your pencils….Find your seat……

Work on something quietly at your desk…

Page 2: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Written Response May 8

Page 3: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Our mission today is to…• Review conductors and insulators

(electrical and thermal) • Review the Electromagnetic

Spectrum

Page 4: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

We will also review........• how certain materials contract

and expand due to changes in heat

Bridge

Page 5: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to your alphabet book

• Thermal energy is transferred through a material by the collisions of atoms within the material. It can warm objects.

Page 6: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Ice Melting Conductors/InsulatorsYou will see ice cubes placed on 4 different surfaces:1. Brick2. Wood3. Metal4. Glass

In your notebook:Predict: Out the 4 materials above…..which will melt the ice the fastest?which will melt the ice the slowest?

Page 7: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Let’s watch

• http://www.youtube.com/watch?v=H9zClquZKBY

Page 8: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Did you get it right????

I learned from the experiment that:• The metal melted ice the ice

fastest, therefore it is the best • conductor of heat.• The wood melted ice the slowest,

therefore it is the best • insulator of heat

Page 9: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to alphabet book…..

• Thermal conductors : materials that easily conduct heat

• Includes metals (aluminum, steel, and copper)• they transfer heat and they hold heat easily

too.

Page 10: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Examples of Thermal Conductors…

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Think about cookware….

• Most cookware is made from different types of metals because they are thermal conductors

Page 12: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to alphabet book

• Thermal insulators : materials that do not conduct heat

• Includes pot handles, spatulas, cooking utensils (do not get hot as easily)

• They reduce (limit) heat transfer

Page 13: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Think about cookware….

• Notice the handles on the cookware…..• The handles do not conduct heat because they

are thermal insulators

Page 14: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Thermal insulators

• http://www.youtube.com/watch?v=43xcvSSFFxc

Page 15: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to alphabet book

• Electrical conductor : materials through which an electrical current can flow easily

• Includes most metals

Page 16: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Examples of Electrical Conductors….

Page 17: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to alphabet book

• Electrical insulator : materials through which electrical current does not easily flow.

• Includes rubber, glass, porcelain, ceramic, plastics

Page 18: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Examples of Electrical Insulators….

Page 19: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Let’s predict…an electrical conductor or insulator?

• Copy chart in your notebook: “Our Conduction & Insulator Experiment”

• “Object Hypothesis (Conductor/Insulator

Result (Conductor/Insulator)

Page 20: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to alphabet book

• Expansion joint: joints that allow for expansion in hot weather and contraction in cold weather

Page 21: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Examples of Expansion and Contraction Joints…

Bridge with expansion joints

Sidewalk with expansion joints

Road with no expansion joints….cracks over time with heating and cooling

Page 22: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Insulator/conductor?

Page 23: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Conduction, convection, radiation?

• Hot coffee is stirred with a spoon and the spoon gets hot

Page 24: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Conduction, convection, radiation?

• A chair is placed near a fireplace. The side of the chair closest to the fireplace gets warm

Page 25: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Conduction, convection, radiation?

• A lava lamp contains colored liquids. These liquids form globs that break off and rise to the top when the lamp is turned on.

Page 26: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Conduction, convection, radiation?

• A college student holds her hand near an iron to see if it is hot.

Page 27: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Conduction, convection, radiation?

• Warm air rises in a room.

Page 28: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Conduction, convection, radiation?

• You flip your pillow over and it feels cool on your face.

Page 29: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Add to alphabet book

• Temperature: measure of heat in an object • Can change due to how intense a the

light striking the surface is, • how long the light shines on the object, • how much of the light is absorbed.

Page 30: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Glue this side down.

Electromagnetic Spectrum

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Electromagnetic Spectrum

• Remember Roxy May Is Victorious Using X-box and GameCube

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Remember

• Wavelength is decreasing from LEFT to RIGHT (Radio to Gamma)

Page 33: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Remember

• Energy is increasing from LEFT to RIGHT (Radio to Gamma)

• Frequency is increasing from LEFT to RIGHT (Radio to Gamma)

Page 34: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Radio

• have low energy & low

frequency • longest wavelength (can be as BIG as buildings)• communication

Page 35: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Microwave

• Used for cooking, communication, forecasting the weather, and directing planes at airports

• Wavelength = size of a honey bee

Page 36: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Infrared

• Used for heating, Satellite imaging (weather) and operating remote controls

• Wavelength = size of a pinhead

Page 37: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Visible Light

• Only waves we can see • ROY G. BIV (colors, rainbow)• Red = longest wavelength• Violet = shortest wavelength

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Ultraviolet• Causes sunburns • Most waves blocked by ozone • Weather reports use UV index

(1-10) • Used in tanning beds • Wavelength = size of molecules

Page 39: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

X-Ray

• Allows doctors to view bones • Too much exposure is harmful • Wavelength = size of atoms

Page 40: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Gamma• Highest energy and most dangerous• nuclear explosions• Used in medicine: kills cancer cells but also

healthy cells (hair falls out)

Page 41: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Electromagnetic Spectrum Video

• https://www.youtube.com/watch?v=snNwE6txxP0

• 34 minutes

Page 42: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

Mr. Parr – Electromagnetic Spectrum

https://www.youtube.com/watch?v=P_PVz8HrrCI

Page 43: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…
Page 44: Study Hall: Sharpen your pencils…. Find your seat…… Work on something quietly at your desk…

The rest is extra if you need it

• Balloon experiment which shows that water is a conductor of heat

• http://science.wonderhowto.com/how-to/perform-cool-water-heat-conduction-experiment-419926/