DAY 106

Essential Question: How does thermal energy flow?

Goals: SWBAT...

1. Explain how common conductors and insulators function

2. Describe why an object which feels cold melts ice faster than a warm feeling object

Warm-Up 106

1. Define heat and thermal energy, making clear how they are different.

2. Why does something feel “cold” on our skin? Why does something feel “hot”?

CLASSWORK

106: HW Review

106A: Lab 4: Heat

1. Read the introduction of the lab on Schoology. Read the steps/questions for part A

2. Safety discussion

3. Starting position assignments

Exit Question:

The metal spoon felt colder. Why did the ice melt faster in the cold metal spoon?

Learning at Home (HW)

Why did the little drops of water on the hot plate ball up and skitter around? (BTW, this is how people can walk on hot coals)

Quiz Monday

- Covering Days 100-107

Essential Question: What is heat?

Goals

1. State whether wood or iron or air are good conductors or good insulators

2. Define Radiation, Conduction, and Convection

3. Label the direction of heat flow

Warm-Up 106

1. What characteristic of air makes it a poor conductor?

2. For objects to conduct electricity, they must _______

3. For objects to conduct thermal energy, they must ______

CLASSWORK

1. Conduction Review from 105C

1. Prof Hewitt says you can touch _______ when it's hot out of the oven. Is that true?

2. Would you want to touch hot wood for a short or long period of time? Why?

3. Which would be safer for you to touch, 100*C (212*F) wood, or 100*C (212*F) iron. Why? Starts with C, ends with....

4. Why is air a poor conductor? Think about the particles in are. Are they closely packed together (high density) or spread out (low density)

5. How do the down comforter, animal fur, styrofoam, or thermal underwear keep you warm?

6. How does holding air prevent energy transfer?

2. 106A: Guided Watching - Heat Transfer

3. 106B. Venn Diagram

In your notes, make a Venn Diagram for the three types of Heat Transfer.

List at least 7 things in your diagram

Learning at Home/HW

- Test Revisions. Complete 106B if necessary

- Thermodynamics Quiz Monday on Days 101-107