Thursday September 24, 2015 Objective I can compare conduction/ convection/radiation Warm Up https://www.youtube.com/watch?v=atnjo7dd_ba Explain 3 types of heat transfer from picture (at end of video) 1
Homeroom You choose Read silently Make up missing work Work on current assignment 2
DEN If you could go back in time and be somebody famous, who would you be? (19th Century & below) Fold paper in half One side 2 paragraphs (Who/Why/ Reason) Other side picture of Famous you > Remember date of birth & deceased date 3
Homeroom: Foundational Core Today's word is "" 4
Today's Agenda Compare/Contrast conduction/convection/ radiation Conduction/Convection/Radiation worksheet Make up missing work Work on 7.E.1.2 Choice Board 5
: : : 9 24 15.notebook Conduction, Convection, and Radiation Worksheet Name: Read the example for Conduction and fill in the sections for Convection and Radiation. CONDUCTION Example/Non Example and Explanation Write your definition of conduction: What is happening? Why is this conduction? Why is this not an example of convection? Why is this not an example radiation? CONVECTION Write your definition of convection: Egg cooking in a hot pan. When a raw egg begins to fry as it hits a heated frying pan, energy from the pan moves to the egg and cooks it. Example Heat is transferred through solids from one particle to another particle or from the pan to the egg. Non Example It is not convection because heat is not transferred through a fluid (gas or liquid). Non Example It is not radiation because heat is not transferred through empty space. Example/Non Example and Explanation Complete this section What is happening? Hot sand heats the air Why is this convection? Example : Why is this not an example of conduction? Why is this not an example radiation? RADIATION Write your definition of radiation: What is happening? Non Example: Non Example: Example/Non Example and Explanation Complete this section Teriburger grilling over charcoal flame Why is this radiation? Example : Why is this not an example of conduction? Why is this not an example of convection? Non Example: Non Example: Fact: The transfer of heat is always from warmer objects to cooler objects! 6
#16 9/24/15 Conduction/Convection/Radiation worksheet Students will complete conduction/convection/ radiation worksheet (front & back) 7
Worksheet: Methods of Heat Transfer (conduction, convection, and radiation) Define conduction: Define convection: Define radiation: Identify the method of heat transfer that takes place in each illustration. Some illustrations may show more than one form of heat transfer. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 8
In each of the following situations, identify the method of heat transfer taking place (conduction, convection, radiation). More than one process may be occurring. 1.Hot coffee is stirred with a spoon, the spoon gets hot due to. 2.A chair is placed several feet from a fire in a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of. 3.A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to. 4.Near the ceiling of a room the air is warmer. The warm air rises because of. 5.A college student holds the back of his hand near an iron to see if it is hot. Heat is transferred to his hand by. 6.A heater is placed under one corner of a water bed mattress. Warm water moves throughout the mattress because of. 7.A certain type of stainless steel cookware has a layer of copper applied to the bottom to help it heat evenly. The copper transfers heat to the pan by. 8.In a swimming pool, the water near the surface is slightly warmer. The warm water rises because of. 9.One end of a copper rod is placed in a flame of a Bunsen burner. Small pieces of wax placed along the rod melt at progressively larger distance from the flame. Heat is transferred through the rod by. 10.A house burns down. On the house across the street, all of the vinyl siding is twisted and warped by the heat. The heat was transferred across the street by. 11.Warm air over the beach rises while cooler dense air from the ocean rushes in due to. 12.The metal skewer gets so hot that you drop your marshmallow in the campfire because of. 13.A huge rock at the state park gets so hot during the day that you can t sit on it from. 14.You lay on that same rock at night so that you can keep warm by. 15.A fireman feels a door and it is hot from the fire on the other side due to. 16.The cause of weather systems on earth is. 17. You are in the top bunk of a bunk bed and you want to turn the air conditioner on while your friend on the bottom bunk is fine is caused by. 9