1. Thermal Energy Transfer F.Q.: How does heat move from place to place…

2. Thermal Energy moves from hot to cold in three ways
Conduction
Convection
Radiation

3. Heat flow depends on the temperature difference
Heat flows from…
Warmer temps to colder temps..until….
Equilibrium is reached…except in humans thankfully…

4. Touch the following items… record the list and note how cool each feels.
1. Desk top 2. Leg of desk 3. Plastic on chair 4. Science notebook 5. Glass beaker Order the items coldest to warmest…

5. Thinking question…why do some materials feel colder than others?
Share your ideas with your table partner…
Watch this….

6. Write the first sentence for a decent definition…
Hey…what’s wrong with the arrows in this picture?

7. Thinking questions….
Which would be easier to conduct heat through, solids or gasses…why?
Why do people get colder easier when they have wet clothes on?
With your whip around group, discuss what you think would be clear explanations for these questions…

8. Watch this…
Can you think of why the blue dye sank and the red dye rose?
Draw a diagram that
would explain why the
colors move the way they do...
What must be under the left and right hand sides of the water tank?
Think about our investigations from last week with the liquid layers of hot, cold, and room temperature fluids…

9. Write the blue and black notes under Convection in your SNB
Movement of two fluid masses based on density – hot = less dense; cold=more dense
Unique to fluids (liquid and gas)
Cold air particles sink (gravity) and begin to warm; warm particles are pushed up (displaced by the cold particles) and begin to cool…
Watch this…

10. ID where the following are CD or CV
Convection vs. conduction
Individual particles ________
Involves gravity _______
Actual transfer of heat __________
Creates a circular motion _______
Occurs in solids, liquids, and gases ______________
Masses of particles with the same density ___________
Moves from hot to cold/high KE to low KE ____________
Involves movement based on density ______________
Occurs in any direction _______________
Movement of masses of air ______________
Occurs only in fluids ______________
Check your answers on the whiteboard behind MsBurroughs...

11. Do the following test at your stations…
Turn the light on
Hold your hand about 6-10 cm away from the light… what you feel?
Place a piece of construction paper between the light and your hand… what do you feel?

12. Write down these 3 bullet points for Radiation
Radiation is the transfer of heat energy through air and space by waves
No particle contact needed, no particles needed for transfer
All substances radiate nrg (unless they are at absolute zero…)
Infrared wavelengths invisible to the human eye
Objects glow different colors at different temperatures

13. Remember, it is not just the sun that radiates energy – all masses radiate energy, even you.
Watch this…

14. Go to FOSSWEB.com msb2nd Bacon123
Click on Convection animation – it will give descriptions of all three energy transfers.
Draw the pot and heater system...Identify where all three energy types are occurring.
(Be sure to click on the second switch with convection)
Annotate your drawings with explanations
For each, describe the places this might occur in the environment....you could draw a picture too. (There is a link on each page)

15. Heat Transfer Challenge
Think of ways people make popcorn…can you think of three ways that people make popcorn that are examples of each type of heat transfer ?
Conduction by
Convection by
Radiation by
Brainstorm ideas in your whip around groups

16. Check out the following
Go HERE
Click through each slide and read & listen to video..some of it will be review and some new
When you get to the EARTH SPACE example draw and show where CCR occurs – you should draw and annotate three earths
Look at the rest of the examples as well!
Go HERE and see if you can complete the venn diagram..
Go HERE and see if you can answer all the questions...