Heating and Cooling3rdGrade Science<br />Teacher: Mrs. Joiner<br />
Elluminate Housekeeping<br />Raising your Hand – Clicking on this icon is how you raise your hand during this session. Please raise your hand if you have a question or comment, and wait until you are called on to ask or type it. We will stop several times for questions.<br />Away– During this session, you can let me know you have stepped away from the computer for a moment by clicking this icon. Click it again when you return.<br />Polling Options – During this session, I may ask you for your feedback to a specific question. You may be asked to use the green check or red X. These may also be replaced by letters or numbers. When using these, only click once. Clicking a second time resets your choice.<br />Emoticons – During this session, you can let me know how you are feeling (Happy or laughing, in agreement, confused, or in disagreement)<br />
Classroom Rules:<br />Remember to always demonstrate your best manners. <br />Be considerate of others and allow everyone a chance to participate. <br />Never share personal information or post inappropriately<br />Listen to all instructions carefully. Do not raise your hand unless you are asked<br />Log-in correctly<br />HAVE FUN!<br />
S3P1. Students will investigate how heat is produced and the effects of heating and cooling, and will understand a change in temperature indicates a change in heat.<br />a. Categorize ways to produce heat energy such as burning, rubbing (friction), and mixing one thing with another. <br />b. Investigate how insulation affects heating and cooling. <br />c. Investigate the transfer of heat energy from the sun to various materials. <br />Explore Our Standards<br />
What do you know about how things heat up?<br />What do you know about how things cool off?<br />Heating and Cooling<br />
That’s Hot!<br /><ul><li>Many things give off heat.
All heat is energy.</li></ul>Sun<br />Fire<br />Electricity<br />
<ul><li>Pretend you are at a campfireroasting a hot dog on a metal wire coat hanger.
Slowly the end of the hanger warms up, as it takes in the heat from the fire. </li></ul>Campfire Activity!<br />
Why Does This Happen?<br /><ul><li>If you leave the hanger in the fire for a long time, the whole hanger will becomeveryhot to touch! </li></li></ul><li><ul><li>It heats up even though the handle end was never placed into the flames.
Heat moves from the flames to the metal handle.
From there it moves to all the molecules in the hanger by conduction until it reached your fingers. </li></ul>Here’s The Reason…<br />
Heat can move from one object to another, or from one molecule to another through the process of conduction.<br />Heat On The Move!<br />
What Is AMolecule?<br /><ul><li>A molecule is like a tiny building block that makes up everything around us. We can’t see them with our eyes.</li></li></ul><li><ul><li>As one molecule is heated it begins to move quickly.
When it does it passes some of its heat energy to other molecules around it.
When this happens, all the molecules of an object move heat from one to another, until they are all hot.</li></ul>Hot All Over!<br />
What things get hot fast?<br /><ul><li>Some materials (objects) get warmer faster than others.
Metal is a good conductor because it takes heat in quickly.
Copper becomeshot quickly, so it is a conductor.</li></li></ul><li>You’re No Good!<br /><ul><li>Other things like wood, plastics, and cotton are not good conductors of heat energy.
These are called insulators.</li></li></ul><li>Color Conductors!<br /><ul><li>Some colors are good conductors of heat!
Black, navy blue, and other dark colors take in heat quickly.</li></li></ul><li><ul><li>Have you ever noticed how quickly you get hot when you are wearing a black t-shirt on a summer day?</li></ul>It’s Getting Hot In Here!<br />
Cool Colors?<br /><ul><li>Wearing white or light colored clothing outside helps you stay cool on hot days!</li></li></ul><li>On a hot summer day: <br />Would a white or black car be hotter?<br />
black?<br />If you did, you are right!<br />Did you choose…<br />
Remember….<br />When heat moves through objects <br />it is called conduction!<br />
<ul><li>Some things hold heat faster than others.
Metaland copper are conductors.</li></ul>Conductors<br />
Insulators<br /><ul><li>Plastic, wood, and cotton are insulators!</li></ul>They do not let heat in quickly!<br /><ul><li>These things are insulators.</li></li></ul><li><ul><li>The color black takes in heat faster than cooler colors like white!
On a hot day, wear a white shirt and chill out!</li></ul>Stay Cool Dude!<br />