# Heat

In: Science

Submitted By iosepa54
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Pages 5

Heat
Professor Olivia Uitto
Science 110- Introduction to Physical Science
April 27, 2012

HEAT 2
How does the study of heat relate to the kinetic theory of matter? The philosophers Democritus and Lucretius stated that matter is composed of particles. They also believed that these particles were in constant motion and in the state of solid, liquid, or gas (Gibbs, 2010). They called this theory the Kinetic Theory of Matter after the word kinema, which is Greek (Gibbs, 2010). In the study of heat we learn that whenever heat is added to a substance, molecules and atoms vibrate faster. Due to the quickly vibrating atoms, the area between the atoms get larger (“Atoms and Molecules”, n.d.). The state of the matter of the particular substance is determined by the motion and space between the particles. The more an object expands, the more space it takes up (“Atoms and Molecules”, n.d.). During this process, the mass of the particular object will not change. Solids, liquids, and gas all expand when heat is added. When an object cools, molecules vibrate at a slower pace. The atoms start moving closer together again and the matter begins to contract. During this process as well, the mass will remain the same (“Atoms and Molecules”, n.d.). Several good examples of the Kinetic Theory of Matter relating to heat is with sidewalks and railroad tracks which are solids. They expand on a hot day but contract as the day gets cooler. As for liquids, when water starts to freeze and turn into ice, the ice begins to expand. Lastly, try leaving a balloon in a hot vehicle. It will begin to expand but contract when it is put in a refrigerator (“Atoms and Molecules”, n.d.).
What is Heat? Margaret Rouse, editorial director for whatis.com, defines heat as “the transfer of…...

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