Exam 4 Kinetic Energy Notes

# Exam 4 Kinetic Energy Notes - speed • The particles in...

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Investigation 4 Kinetic Energy Notes Goal: To observe expansion and contraction of solids, liquids and gases and be able to explain the phenomena in terms of kinetic theory-the motion of particles. Main Ideas and Content Kinetic Energy is the energy of motion The particles in substances gain kinetic energy as their temp rises and lose kinetic energy as their temp cools (lowers) Matter expands when the kinetic energy of its particles increases; matter contracts when the kinetic energy of its particles decreases The amount of heat (particle kinetic energy) can change as a result of energy transfer. Energy transfer occurs when particles come in contact with one another Air can be compressed. Water cannot be compressed. There is no space between the particles of water Two ways you can increase an objects kinetic energy are increase its mass or
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Unformatted text preview: speed. • The particles in gases all move independently. As gases heat up the particles move farther apart and the volume of the gas increase • The particles in liquids move around but are in contact with one another. As liquids heat up, the particles move farther apart and the volume of the liquid increases. • The particles in solids are not free to move around; they are bonded together. As solids heat up, the particles vibrate more, and move farther apart, and the volume of the solid increases Compression vs. Contraction Compression: the decrease of gas volume as a result of applied force Contraction: the decrease of volume due to decreased kinetic energy of particles Both give the particles less volume Expansion: The increase of volume due to increased kinetic energy of particles....
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