Let's find out, grade 2; It's warm

Now when my two boys and girls to listen I was your son's wedding brings you another spine doc program. Hello boys and girls. Can you tell when things are warm or cool when you text them with your fingers. Well if you can then I guess we're ready to try some experiment. Mr warm Are you ready. Miss School where are you. Your teacher is going to be a helper to the teacher. Are you ready. Are all three of you up at the table. All right fine. I hope you've chosen very careful helpers today because we need to be extra careful when we work with a lighted candle. Don't worry. In just a second or two we're going to ask your teacher to light the candle

for you. And when she does let's all watch very carefully. So some day if you ever need to strike a match you'll know exactly how to do it. It's very easy to burn fingers. If we don't strike the match just right but remember never light a match. And lest someone much older than you is with you Will you remember that. Good. Now T.J. if you take one match out of the box please. And close the box all the way. Now strike the match away from you on this side of the box. All right let's blow that match out and a good place to put it would be right into the water there there on the table in a pan of water that you have

that way will be sure it will not burn anything on anybody. Now let's strike another one. One match out of the box close the box tightly and drag the match away from you on this side of the box. Good. Now when you light the candle please. And when it's lit drop the burning match into the water. Did everybody watch what teacher did. Good. Let's be sure that Kendall is right in the middle in the very center of the table and away from everything else. Move it very carefully if you need to. Thank you teacher you're a careful helper to miss school. Are you a very careful person. You have to be you know

when we show all the boys and girls in your room what we're going to do today we're going to show them that heat travels through thing as it travels through some things faster than it does through others. Miss school will you move away over near the right end of the table please near your right hand. Now think about which is your right hand and move that way clear to the end of the table. Oh stay behind the table don't get over on the end of it. All right are you ready. Good. Now hold out your right hand with the palm of your hand facing the candle. Are you still way off near the right end of the table. All right. Hold your hand still. Teacher perhaps will need a little help. Be sure MS schools hand is on a level with a candle flame poem facing the candle. But a good distance away to the right.

Now are we ready. Hold your hand still miss school. Can you feel any heat from the candle on your hand way over there. All right now move slowly move your hand closer. And closer to the candle. You may have to move yourself to move your hand closer to the candle until you can feel the heat from the candle flame. Keep your hand at this side of the candle. Never put your hand over the top of a lighted candle will you remember that. All right. Now when you do feel heat coming from the candle flame stop moving your hand and hold it still. If your hand gets too warm. Move it back a little. Now if you're going to hold your hand there a minute or two while we think about something let's think hard. Mr. warm. Take a good look at the candle. And then it mist cools

hand. In you see anything between the candle flame and this cools hand. What is between the candle flame and this girl's hand. You can't see anything there can you. But there is something between the candle and mist cools hand. Who knows. Something that's all around us something that we breeze. Now do you know. Who said air. You're right. There is between the candle flame and mist cools hand. Your arm and in the hand tired was cool. Well take it down for a second or two the wrist. Did the heat from the candle flame travels through the air to miss cools hand. Yes it did. Now I'm as cool as your arm rested. Good. We'll hold your hand up

again right in the same place where you could feel the heat of the candle and hold it still. Don't you feel the heat now again. All right. Through what is that he traveling to reach your hand. Say it loud enough for everybody in your room to hear. It's traveling through air that's right. It's cool. Thank you very much will you take your hand away now. This time we'd like Mr. warm to hold his hand near the candle flame. Wait a minute Mr. warm. Start with your hand way off over the end of the table. Facing the candle. Now move it slowly nearer the candle until you can feel the heat. When you feel heat hold your hands till you're sure you can feel the heat from the candle. All right. There your hands are warm. Hold it still. This cool when you pick up the piece of cardboard please. Now

very carefully and you better listen first before you do this don't do it until you have listened about what you are to do. I'll tell you just when to do it. We want you to slip the cardboard between Mr. warms hand and the clay candle flame close to his hand. Keep it away from the flame flapped against his hand. Now can you do that. All right. Slip the cardboard between the candle flame and Mr warm stay and hold it still not Mr warm. Do you still feel the heat from the candle. He doesn't travel very well through the cardboard does it. Take your hand away Mr warm and Miss cool take the cardboard away too. And put it down on the table. You may want to try that again after the broadcast. With someone else in your room. But before we try something else let's think a minute. Let's pretend that you are sitting near a window.

Everybody can pretend and if you answer softly you can all answer this question out loud. Pretend you're sitting near a window where the sun is shining right on you. Would you feel the heat from the sun. Even if the windows were closed I think you'd feel the heat from the sun don't you. You could try it sometime. What would happen if someone pulled the window shade down and shot out the sunlight. Would you feel as warm as you get. Does he eat from the sun travel very fast through window shades. When you think about other things that heat will not travel through very well or very fast. Good. But now we'd like to try something else Mr warm you ought to have something made of metal there on the table. Will you pick it up and hold it very close to one and be sure you're holding it between your sum and first finger and very close to one end.

Does the metal feel warm to your fingers or does it feel cool. All right now Mr. Orme listen first before you do this so you'll know what to do without hurting your fingers. We'd like you to hold the piece of metal at one end and put the other hand right into the candle flame. What do you suppose will happen. Well let's find out. Are you ready. Now as soon as you feel something happening take the medal away from the flame and put it into the pan of water. All right Mr. warm hold one end of the metal in the candle flame. Anything happening. Do you feel the metal and in your fingers getting warm. But I take it out of the flame before your fingers feel too warm and without touching the other end drop it into the water. Did the heat from the candle flame travel up to your fingers Mr. warm. Did it take very long to travel up that piece of metal.

Which is cool or would you like to try that too. Good. Take the piece of metal out of the water and wipe it dry on the towel. And will be ready to try this again. Is it dry. All right no matter if there's a drop or two left on it. All right Miss cool. Hold a piece of metal near one end between your thumb and first finger way down at the end. Now put the other end into the candle flame hold it up near the top of the flame. Hold it still. Do you feel the metal getting warm between your fingers. When you do don't hold it too long. When it gets warm take it out of the flame and drop it into the pan of water. Now maybe your piece of metal is heavy and long and we haven't given it time given the heat time to travel up through that piece of metal. But

if you had a thin piece of metal or piece of wire then it traveled up very fast even more perhaps before ours did here in the studio. Well you want to try it once more Mr Cool. All right take the metal out of the water quickly and wipe it again. I ready. All right hold it by one hand between your salmon finger. Alright now put the other end into the candle flame hold it up just at the very tip the top of the candle flame. Hold it still has a metal feel warm you think. Is it getting warmer when only you will know when so stop whatever gets pretty warm and drop it into the pan of water. All right well now if you didn't have a chance to find out how fast that he came up that piece of metal you tried later won't you. First of all let's blow up the candle.

One of you blow it out. Thank you. We always want to remember to blow out the candle. Quickly after we finished using it. Well today we had time to try only a few things to show that he travels through things did we. Will you try some more. Think about what you did today will you. Then you'll be able to answer these questions. Does he travel through so somethings does he travel faster through some things than it does through others. Will you try some more experiments. Why. Let's find out originates in the studios of the St. Louis

mort of education radio station. This is the end the E.B. Radio Network.