Goals:
1. Define heat
2. Define temperature in relation to KE
3. Explain how a thermometer works
WARM-UP
1. Imagine a Fourth of July sparkler. Does it hurt if a spark hits you? Why/why not?
2. What about walking across a bed of hot coals. People do it. How? Does it hurt?
3. One more. Can you move your hand through the flame from a lighter or match? Does that hurt?
CLASSWORK
102A: Thermodynamics Conceptions
Which of these statements are correct?
Metals attract, hold, or absorb cold.
Conductors conduct heat more slowly than insulators.
Insulators conduct heat fast and heat leaves so insulators don’t feel hot.
Insulators absorb/trap heat.
Wool warms things up
There are two types of heat: hot heat and cold heat.
Heat is a material substance.
Temperature is an extensive quantity. (meaning, it depends on the amount of substance)
Temperature of boiling water can exceed 100 °C during boiling.
Temperature is a measure of heat.
102B: Understanding Heat and Temperature
Think back to our Phases & Changes Lab from Friday.
What happened to the ice? Why?
Why did some water leave it’s liquid state, and convert to a gas (to make steam) and then turn back into a liquid to make condensation?
To answer these questions, we need to understand the concepts of temperature, and heat.
Our activity to do that is here: https://docs.google.com/document/d/1Xq2agFM48XOy4XieMn_ldA1bqstgPhXZjoDTnOnuBLQ/edit?usp=sharing
HW/Learning at Home
- Lab 3: Phases & Changes due tonight by 11:59pm
- complete any of day 102
- Notebook check Friday - Days 94-102
Notebook Check this Friday. Today should include your W/U answers, and your exit questions. The Classwork will be on Schoology.
Essential Question: How does thermal energy flow?
WARM-UP 102
1. What is condensation?
2. List three places you've seen condensation.
CLASSWORK
102A: Lab 3: Phases & Changes Lab
- Safety Concerns
- Link: https://drive.google.com/file/d/0B-AiPYEb3nFVLWN6YktMVnh3TU0/view?usp=sharing
- Due next Wednesday 02/26 11:59pm via Schoology
Exit Question(s):
1. When you let an icy cold glass of water sit out on a warm day, condensation forms on the outside of the glass. Does thermal energy flow from the surrounding air to the glass, or from the glass to the air?
2. If you put a few drops of water in a pan, and then heat that pan on a stove, what happens to the water? Is thermal energy going from the pan to the water, or from the water to the pan?
3. Consider your answers to #2 and #3. Is condensation on a surface evidence of that surface adding thermal energy to the surrounding gas, or taking thermal energy away?
Learning at Home/HW
Complete Lab 2: Crash Barrier. Due Saturday 11:59pm
Complete Lab 3: Phases & Changes Lab. Due Wednesday 11:59pm