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Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
Night vision!
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
Night vision!
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
The Energy of Heat
Copyright © Houghton Mifflin Harcourt Publishing Company
• Heat is the energy that moves between objects of different temperatures.
• The difference in temperature makes the energy move.
• Heat moves from an object with a highertemperature to one with a lower temperature.
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Heat can move in different ways.
• Conduction is the transfer, or movement, of heat between two objects that are touching. It can also occur within an object.
Example :When you hold a snowball, heatfrom your hand is conductedto the snow.
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Heat can move in different ways.
20 C 0 C
Loses heat energy
gains heat energy
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Heat can move in different ways.
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
•Convection is the transfer of heat within a liquid or a gas.
Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company
•
Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company
•
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Particles in liquids and gases move easily, and they take heat with them.
• Movement of particles is from down to up.
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Hot air in a hot-air balloon moves from the burner throughout the balloon by convection.(from down to up)
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
Heat on the Move!
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
Feeling Radiant!
Copyright © Houghton Mifflin Harcourt Publishing Company
• Radiation is the transfer of heat without matterto carry it.
• Heat from the sun radiates through space and the atmosphere before it warms Earth.
• Radiation of heat is done in all directions.
Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company
How is heat transferred?
Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company
How is heat transferred?
Unit 9 Lesson 3 What Is Heat?
Copyright © Houghton Mifflin Harcourt Publishing Company