GPS: S3P1. Students will investigate how heat is produced and the effects of heating and coolinga. Categorize ways to produce heat energy such as burning, rubbing (friction), and mixing one thing with another. b. Investigates how insulation affects heating and cooling. c. Investigates the transfer of heat energy from the sun to various materials. d. Use thermometers to measure the changes in temperatures of water samples (hot, warm, cold) over time . HOT! HOT! HOT! All About HEAT!
EQ: What is heat? • Write on a piece of paper what you know about how heat is produced/made. Share what you write. • Read page 196, paragraph 1. What is heat? A. Heat is a form of energy that moves from one object to another. Heat travels through solids, liquids, and gases; from a warmer object to a cooler one. Example (Activity 1): Pair up. See which partner has colder hands. The partner with warm hands will make his/her hands warmer by rubbing his/her hands together briskly. Partners will hold hands. How did the heat travel? From warmer hands to the cold hands or from cold hands to your warm hands?
How does heat travel or move? • Heat travels from a warmer object to a cooler one. • Heat travels through solids, liquids, and gases. • Describe how heat travels or transfers for each: 1. hot cocoa(liquid) to metal spoon (solid) = The heat travels from liquid to solid. 2. warm air (gas) coming from the vent blowing toward us (solid) = The heat travels from gas to solid 3. steam or water vapor (gas) from boiling water (liquid) = The heat travels from liquid to gas. 4. your body (solid) and the sweater (solid) you wear = The heat travels from solid to solid. 5. putting ice (solid) to tap water (liquid) = The heat travels from liquid to solid.
Make a Book on Heat • Write on your paper: Book About Heat By (your first and last name) 3rd Grade
Make a Book on Heat • (Write on the 1st page of your book using a sheet of paper): What is Heat? Heat is a form of energy that moves from a warmer body/object to a colder body/object. Heat can travel through solids, liquids, and gases. (Draw the examples on slide 3 or make your own examples.)
What are the sources of heat? • Look at the pictures on pages194, 196,and 197. What are the sources of heat? The sources of heat are the sun,fire,electricity and friction. • Look around the classroom…What sources of heat do you see? • (On the 2nd page of your book, draw the sources of heat. Write captions)
How is heat produced? • By Friction (rubbing of two things together). Experiment/Activity 2: • There will be a bag of different objects. Combine any 2 objects to rub together. Make a chart.
How is heat produced? A. Heat is produced/made by Friction. 2. Listen to your teacher as she starts the timer. As soon as you hear the timer, start rubbing the first 2 objects (on your list) as fast as you can. Stop when you hear your teacher saying “stop”. Touch the surfaces of both objects. Record your data/information. 3. Do the same with the next sets of objects on your list.
How is heat produced? • A. Heat is produced/made by Friction. 4. Which object(s) felt the hottest? Why do you think so? Page 3 Complete the first part of the chart. Page 5: Draw several ways how to produce heat by friction. Use your Activity 2 chart or use your own examples. Write this heading on top of the page: “Ways to Produce Heat by Friction” Look at the model page made by your teacher.
How is heat produced? • B. Heat is produced by burning. Read page 197, paragraph 1 • What are the examples of heat production by burning? a. Cars burn fossil fuels to produce heat. b. Your body burns food to produce energy. c. We burn logs/wood, paper, coals for: campfire, cooking, fuels.
How is heat produced? • B. Heat is produced by burning. Page 6 of your booklet: Draw examples of producing heat by burning. Write this heading on top of the page “2. Heat is Produced by Burning” Look at the sample work done by your teacher.
How is heat produced? • C. Heat is produced by mixing or combining 2 or more things together. • Activity 3:Heat Packs • Lets us read the label of the heat pack. • What does each pack contain? _______ • What is the correct and safe way to use it? What happens if we shake the heat pack? Why? • Now let’s shake the heat pack and see what happens in 5-10 minutes. Ready?
Write on p. 3B How is heat produced? 3. Mixing
How is heat produced? • C. Heat is produced by mixing or combining 2 or more things together. Illustrate or draw what you just did with the heat packs or hand warmers. • Let’s watch a video from brainpopjr.com! • Complete page 4.
Extra! Extra! What is temperature and how do we measure it? • All objects are made up of very tiny particles or molecules. They always move. The energy that makes them move is called thermal energy. Hot objects have a lot of thermal energy (the molecules move more). Cold objects have less thermal energy (the molecules move less). Let’s play the role of molecules in an object! • Temperature is a measure of how hotor cold something is. It describes how much thermal energy an object has. • You and your partner will be given 2 thermometers. Please do not touch them yet!
What is temperature and how do we measure it? • A thermometer is a tool used to measure temperature. It measures how much thermal energy or heat a body or object has. • Let’s learn how to use a thermometer. • Look at your thermometer. What are the letters on top of each number line? They are the units we use to measure temperature. • ˚F stands for Fahrenheit. This is the unit we use in the U.S.A. • ˚C means Celsius or Centigrade. This is the unit most countries in the world use because it is easier to read.
How do we use a thermometer? • Answer pages 8 - 13 • Activity: Let’s dip your thermometer in different water temperatures. • Let’s talk about different temperatures that you should know about (p. 7).
How does the heat transfer from the sun to various (different) materials? • The heat from the sun travels through space in waves. • All things on Earth are changed in some way by the sun. • Let’s read the readers’ theater script “How does the Sun Transfer Heat to Different Objects?” pages 14 and 15. • Answer the questions on page 16.
How do we trap heat (or cold)? • Why do we need to trap heat? 1. We need to trap heat to keep our food or drinks warm. 2. We need to trap heat to avoid getting burned. 3. We need to trap heat to make us feel comfortable. • We will learn about materials that trap heat well which we call “insulators”.
Why do we need materials that get hot easily ? 1. To cook our food faster. 2. To transfer or conduct electricity. 3. To cool our drinks easily. We will learn about materials that get hot easily, yet lose heat easily. They are called “conductors”.
Conductors Versus Insulators • Conductors are materials that heat move through easily. They heat up quickly, yet lose their heat quickly. Examples are many kinds of metal and glass. • Insulators are materials that heat does not move through easily. They don’t heat up quickly, and they don’t lose their heat quickly. They are “heat traps”.Examples are wool, wood, cotton, fur, rubber, and Styrofoam.
How do we trap heat or thermal energy? • I will show you objects and sort them out: Conductor or Insulator? • Draw 3 examples of conductors and 3 examples of insulators • How do we trap heat or cold? What materials do we use to do so?
Let’s finish your book! Answer pages 17-21. Answer Study Guide.