1. Thursday: January 26,2017 Please get Science Journals
Review “Thermal Energy” Voc.
“Thermal Energy” Notes Activity
Thermal Energy Sort Exit Ticket

2. Heat Transfer
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3. Introduction – BBC Bitesize
Check out the video “Conduction, Convection, and Radiation” from BBC Bitesize.
Click on the video title to access the animation. URL:
(GCSE -> Science ->Physics -> Energy)
If your school has a Brain Pop description, you may want to use the Brain Pop video on heat transfer instead:
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4. Can we have three methods of heat transfer at once?
There are three types of heat transfer:
Conduction
Convection
Radiation
Can we have three methods of heat transfer at once?
YES!
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5. Conduction Imagine it is very cold outside and you walk to school.
As soon as you come inside, I hand you a mug of hot chocolate. What happens to your cold hands?
1. Conduction – Transfer of heat through matter by the direct contact of particles.
Happens most frequently in solids, because in solids the particles are packed closely together.
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6. Conduction
Can you think of some more examples of heat transfer through direct contact?
Check for understanding.
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7. Convection
You’re visiting your grandparents and find an old lava lamp. Groovy! You plug it in. After a few minutes, globs of a thick, colored liquid begin to rise from the base. When each glob gets to the top, it falls back down.
What do you think is happening?
Is this a method of heat transfer?
For the unfamiliar: A lava lamp has a glass cone filled with a liquid and a brightly-colored waxy substance sitting on a base over an incandescent light bulb. When you turn the lamp on, the heat from the bulb melts the waxy substance, and it moves around the lamp in clumps, rising and falling due to convection.
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8. Convection
One way that liquids and gases differ from solids is that they can flow. (What does flow mean?) This makes them fluids.
Convection – heat transfer in a liquid or gas by flowing movement of heated particles
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9. Convection
In convection, the particles actually rotate and move from one place to another.
Warm fluids rise while cooler ones sink.
How is this different from conduction?
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10. Radiation
You go out to the pool for a nice morning swim. You jump in, and the water is freezing! Brr! You get in the pool again later that hot and sunny afternoon, and the water is several degrees warmer than it was before.
What happened?
Is this a form of heat transfer?
Radiant energy from the sun heated the pool water over the course of the day.
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11. Radiation Where does all of earth’s heat energy come from?
Conduction and convection require matter (solid, liquid, or gas) to transfer heat.
However, there is very little matter between us and the sun.
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12. Radiation
Radiation is the transfer of energy by electromagnetic waves.
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13. Left Side – Guided Practice
Directions: Classify each example as conduction, convection, or radiation and write your answer in the chart.
Conduction
Convection
Radiation
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14. Left Side – Guided Practice
Example 1: A pot sitting on a hot burner Example 2: Touching a metal spoon that is sitting in a pot of boiling water Example 3: A person placing their cold hands over a warm fire
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15. Left Side – Guided Practice
Example 4: Picking up a hot cup of coffee
Example 5: Using an electric blanket to get warm
Example 6: Putting your wet shoes on a floor vent to dry them faster.
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16. Left Side – Guided Practice
Example 7: Lying out in the sun to get a tan
Example 8: Macaroni rising and falling in a pot of boiling water
Example 9: Cold water sinking and warm water rising in the ocean
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17. Left Side – Guided Practice
Conduction
Convection
Radiation
Ex 1: A pot sitting on a hot burner
Ex 2: Touching a metal spoon that is sitting in a pot of boiling water
Ex 4: Picking up a hot cup of coffee
Ex 6: Putting your wet shoes on a floor vent to dry them faster
Ex 8: Macaroni rising and falling in a pot of boiling water
Ex 9: Cold water sinking and warm water rising in the ocean.
Ex 3: A person placing their cold hands over a warm fire
Ex 5: Using an electric blanket to get warm
Ex 7: Lying out in the sun to get a tan
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18. Independent Practice Gallery Walk
On your own, complete the worksheet for the gallery walk.
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19. Exit Slip
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