GAME IN THE SUBMISSION MATERIALS chain HEAT TRANSFER

GAME IN THE SUBMISSION MATERIALS chain HEAT TRANSFER

At the time of delivering the material on heat transfer, I use the method of chain-game message is very simple, but with the simplicity of this game turns out students' understanding even faster. The faster because students can likens itself to particles in a substance that is used as heat transfer medium.
As we all know that there are three kinds of heat transfer, namely conduction, convection and radiation. To explain the concept of conduction, convection, and radiation to the students sometimes have problems caused by not pahamnya students about the constituent particles of a substance. Therefore, we need a method that is possible to make the students become more easily understood about the concept. Games that I use to explain the concept of conduction, convection and radiation is to use a chain message model. But in this model to replace my little message delivered by giving the object from one student to another student.
Before I execute the game, I tell the students that a substance composed of atoms. Atoms will vibrate if the temperature rises. Temperatures are owned by the stationary object or heat on a body called the potential energy which means that thermal energy possessed oelh object because the temperature. When the heat switch, that is what is called the heat.
At the time explaining the concept of conduction, students can cite the definition of conduction by way of reading the book, but when asked further explanation of conduction, the students experienced difficulties. That's when my game began.
This game I began by explaining that students are permisalan atoms and markers are the heat. Students who held the first marker is the atom that receives the first heat. Then the markers are given to friends the other until all students receive a marker. When finished playing on, I gave the question of whether markers changed hands when the students also come to move? The students answered "no", whether as markers until the very end of the sequence followed by the first student who holds the markers? "No." That is, when the atoms vibrate because of heat, atoms - atoms that move heat from one atom to another atom, so that the heat flow (move) from atom to atom to another. As a result all the objects into heat. Heat transfer is not accompanied by the displacement of atoms is called the heat transfer by conduction. Heat transfer by conduction occurs in solids. After that I gave examples in everyday life. For example: when we hold the spoon to stir the hot milk, cold spoon at first, but after a while will feel the heat. Spoon is due to the heat moves by conduction heat from the tip of an entry in a glass of milk to the tip of the hand-held.
At the time of going to explain the heat transfer by convection, I give the marker to the students at the front and ask the student to drive her back to the students the most, and students who receive a marker and then I requested to deliver to students at the front. This I did for some students. After that I gave pertantaan "how markers can be up to students who most back?" The students answered "by the way delivered." "Whether students at delivers markers that carry markers also participate"?, "Yes". "What most students at the rear provide markers to students at the front was also involved with the markers in the future"?, "Yes". "What a move followed by hot particles?," Yes ". This means that the heat switch is also followed by the displacement of atoms that menghantarkannya. Now heat transfer accompanied by displacement of atoms or particles is called the transfer by convection. Heat transfer by convection occurs in the substance flow (gas or liquid).
Once students understand the sense of convection, I give examples of incidents of heat transfer by convection, for example when cooking water, note that some time after the water is heated will arise udaha bubbles from the bottom of the pan. The bubbles are actually carrying hot water particles toward the surface. Hot water particles become lighter because of the reduced species, because it is lighter then water particles will move toward the surface and replaced by water particles that are still cold, so on a hot water particles will be brought to perpmukaan and replaced by a heavy cold water . Until finally happened particle velocity of hot and cold water interchangeable.
At the time explaining the concept of heat transfer by radiation the students who sat at the front I have to make balls of paper. After that I explain that the ball - the ball we suppose that we wish to move heat, while the students who held the ball is the constituent particles of the substance. After that I asked the students who held the ball threw the ball to the students who sat at the back and ask the students who sat at the back to catch it. After that I asked the students who received the ball to melempakan ball to the student who sits in the middle and ask the students who sit in the middle to catch it. After that I asked, if the balls move through an intermediary (medium)? "," No. " Whether balls are thrown with not through the medium until the students who received the ball? "," Yes to ". So it moves the ball by not requiring However the medium remained until its recipients. Well that does not require heat peprindahan medium (broker) is called the heat transfer by radiation. After that I gave examples in everyday life such as the hot sun to the earth to penetrate the vacuum region, but the heat still ampai to earth, the heat of the fire that came to people close to the campfire.
A very simple game has helped me in clarifying the concept of heat transfer in the class Model 7, and the results of the students seemed more enthusiastic in the study of physics, because the students do not feel that they are learning. All they know is they are playing with a chain message. End of the meeting I asked the students to explain again about the understanding of heat transfer by conduction, convection, and radiation, and the results the students could explain these concepts and their explanations examples.