Sunday, March 5, 2017

Heat and Heat Transfer

http://www.spectrose.com/modes-of-heat-
transfer-conduction-convection-radiation.html

            What is Heat? Heat is a form of energy when things get hot the molecules move faster and the object then has more energy. When things get cold the molecules slow down and the object gets cold. Like when you rub your hands together really fast to make them warmer. When you rub your hands together that make friction which makes energy which makes heat. But have you ever wondered why your feet start to burn when you walk on sand at the beach on a sunny day, or why when you stir a hot drink with a metal spoon the spoon gets hot, or why does the side of you that faces the fire get really hot? The answer to that is heat transfer. There are three different types of heat transfers, Convection, Radiation, and Conduction. Convection is the simple movement of heat, hot air rises cold air sinks, like when you walk barefoot on the sand at your favorite beach on a sunny day and you feet start to burn. This is because the hot air in the ground rises into your feet. Convection is the transfer of heat through fluids. Radiation is when heat is transferred to another object through electromagnetic waves. When you get warm from sitting by a fire it is because the fires heat is being transferred through electromagnetic waves to get to you. Last but not least we have Conduction. Conduction is the transfer of heat when two objects are touching. When you stir a hot drink or a hot cup of soup with a metal spoon and the spoon gets hot this is because the heat from the hot substance is being transferred to the spoon by conduction.

S&EP
SP2

I drew a picture of the three types of heat transfer so that I could better understand them. This helped me because I was able to see how the three types of heat transfer worked and how it looked when it worked. This also helped me differentiate the different forms of heat transfer from each other by seeing the way that they worked.

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