Unit 3 Lesson 2 Energy Transfer
Unit 3 Lesson 2 Energy Transfer
Copyright ? Houghton Mifflin Harcourt Publishing Company
Unit 3 Lesson 2 Energy Transfer
Hot and Cold
How are energy and temperature related?
? All matter is made up of moving particles and has kinetic energy.
? Temperature is a measure of the average kinetic energy of particles.
? The faster a particle moves, the more kinetic energy it has.
Copyright ? Houghton Mifflin Harcourt Publishing Company
Unit 3 Lesson 2 Energy Transfer
How are energy and temperature related?
? Thermal energy is the total kinetic energy of particles.
? Thermal energy depends on the number of particles.
? The more particles there are in an object, the greater its thermal energy.
Copyright ? Houghton Mifflin Harcourt Publishing Company
Unit 3 Lesson 2 Energy Transfer
How are energy and temperature related?
? How does kinetic energy change as particle motion increases and decreases?
Copyright ? Houghton Mifflin Harcourt Publishing Company
Unit 3 Lesson 2 Energy Transfer
What is thermal expansion?
? As the space between particles increases, a substance expands.
? The increase in volume that results from an increase in temperature is called thermal expansion.
? Thermal expansion causes a change in the density of a substance.
Copyright ? Houghton Mifflin Harcourt Publishing Company
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