Heat Transfer Do Nows.

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Presentation transcript:

Heat Transfer Do Nows

What boils faster a pot of water with a lid on or off? Why? Do Now #1 Page 48 Why does Mrs. Daggett prefer to park under the shaded parking structure, especially when she has girl scout cookies in her car? What boils faster a pot of water with a lid on or off? Why?

Do Now # 2 pg. 48 A. Why is making tea with hot water easier than cold water? Explain. B. Create a model to show the difference between the air molecules in a room that is 85°F vs. 65°F.

DO NOW #3 New Page! pg. 53 Yesterday we did a calorimeter lab. Think about the lab and write down everything you noticed and everything you wondered about the lab. What did you notice about the calorimeter lab? What did you wonder about the calorimeter lab?

What direction is heat transferred? Do Now #4 pg. 53 Do you think a bottle of water sitting on the desk has Kinetic Energy? Explain Do you think a bottle of water sitting on the desk has Thermal Energy? Explain What direction is heat transferred? How is heat transferred between molecules?

Do Now #5 New Page pg. 57 A. Which 3 containers had the smallest change in temperature? B. What do those containers have in common? C. Which containers got the warmest? D. What do the containers that got the warmest have in common? E. If a cup of coffee at 85 degrees is left in a room at 75 degrees what would the temp of the coffee be in 5 hrs? Explain

A.Explain how heat transfers in each type of heat transfer. Do Now # 6 pg. 57 A.Explain how heat transfers in each type of heat transfer. Radiation Conduction Convection. What do the yellow arrows represent in the picture? Explain. What do the red arrows represent? Explain.

Do Now # 7 Answer the following questions using the data collected during our conduction vs insulator investigation: Which material lost heat at the quickest rate? The slowest rate? Which material is the best for insulating/ keeping heating in? Which material is the best at conducting/letting heat out? Which material would you want to put hot chocolate in? Why?

Explain which would keep you warmer on a cold night: Do Now #5 pg. 32 Explain which would keep you warmer on a cold night: – A lighter weight sleeping bag that is tight around your body –A heavy weight sleeping bag that is extra wide?

A. Why is making tea with hot water easier than cold water? Explain. Do Now # 6 Pg. 32 A. Why is making tea with hot water easier than cold water? Explain. B. If a cup of coffee at 85 degrees is left in a room at 75 degrees what would the temp of the coffee be in 5 hrs? Explain

Why are our cooking pans made of metal? Do Now # 8 pg. 35 If a material has a lot of molecules packed close together would it be a better conductor or insulator? Why? If you want to keep something hot or cold should you use an insulator or a conductor? Why? Why are our cooking pans made of metal?

Do now # 10 pg 38 Draw and explain a diagram showing heat transfer. What is Kinetic energy? Draw a picture showing a molecule with more kinetic energy and one with less kinetic energy? What is thermal energy? Does hot water or cold water have more thermal energy? When is the test?