Do Now HW due tomorrow

Transcription

1 Do Now HW due tomorrow 1. Water absorbs heat and releases heat than land does. 2. Why does water and land heat up and cool down differently? 3. What is heat capacity? 4. Which has a greater heat capacity ocean or land? Why? 5. Which heats up fastest ocean or land? Why? 6. How is the air above land different from the air above water? BE SPECIFIC!!!

2 Announcements Super 6 winners (4 th period) Tutorial Tuesday 4:30-5:30pm Quiz Friday on heating FLAME will be on Friday from 4:30-6:30pm

3 Critical Thinking Question Time From your reading what questions do you have? Or what questions do you think we will answer for the next two days in class?

4 Thermal Energy Stop & Think: What does Thermal Mean? Connect: When have we heard this word? Fast (HOT) atoms Slow (COLD) atoms Heat is energy in motion. All matter is made of millions of tiny particles These tiny particles are constantly in motion. Common Temperature

5 Why move hot to cold???? when warmer objects are put next to cooler objects, the warm objects lose heat and the cool ones gain it until they are the same temperature.

6 Why do we feel cold then? Cold is lacking heat so heats up when heat is nearby or added can t give off absence of heat. When your heat leaves you to flow into the refrigerator you feel cool.

7 Heat in Motion It moves in three different ways: 1. Conduction 2. Convection 3. Radiation Critical Thinking: Which do you think is which?

8 Demo: Conduction Metal Pan Demo Students answer lab questions

9 Thermal Energy Transfer through Conduction What do you think conduction means? The transfer of heat (energy) through contact is called conduction. Example: Touching a hot pan that is on the stove

10 Demo: Radiation Light Bulb Demo Students answer lab questions

11 Examples: Sun heating the earth, a fire heating a house, a heat lamp. Thermal Energy Transfer through Radiation What do you think radiation means? When heat moves as electromagnetic waves (where there is no fluid or solid), it s called radiation (without direct touching.)

12 Demo: Convection Paper Spiral Demo Students answer lab questions

13 Thermal Energy Transfer through Convection What do you you think convection means? When heat moves because of differences in density is called convection. Examples: Water circulating in a boiling pot, convection currrents in the mantle.

14 Heat Transfer Ball Toss Line Relay

15 Catalyst HW due Friday Quiz Friday Tutorial today Answer question on lyric sheet & then sing and follow along for review of yesterdays terms: 1. What does Thermal Energy mean? 2. What are the three ways heat energy can be transferred? How are they different? 3. What direction does heat always travel in?

16 Heat Transfer Ball Toss Line Relay

17 Model Gallery Walk What makes you think heat is moving in this picture? Answer: I can see the chocolate melting so heat must be involved. What type of heat transfer is this? Why? Answer: Conduction because there is direct contact between the heat source (hand) and the object (chocolate bar) Where does the heat come from and where does it go? Answer: Heat comes from body warmth/hand and goes to chocolate bar because heat moves from hot to cold. What critical thinking questions do you have? Can you ever have two different types of heat transfer in the same scenario? What would happen if my hand was colder than the chocolate in this scenario?

18 Gallery Walk: As a team walk silently to your assigned poster with your notebook and your poster marker When I say go you will discuss each question in your group, all members will write answers in their notebook. For question 2 the marker holder will write your answer to question 2 on the poster and as a group you will check other groups work (edit and explain error if necessary) When the timer goes off rotate to the next poster and repeat.

19 Gallery Walk Discussion Hardest? Easiest? Mistakes seen? Advice to others struggling? Critical Thinking Questions

20 Heat Knowledge Application in Life: v/video.php?id=1162

21 Check for Understanding: Question In your notebooks answer the following question: 1. Where in this picture do you see radiation? 2. Where do you see convection? 3. Where do you see conduction?

22 Check for Understanding: Ans

23 Heat Transfer song

24 EXIT TICKET

25 FYI Extension: Thermos Bottles Minimize Heat Transfer