Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? What’s the State? There are three common states of matter: solid, liquid, and gas. Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Space ( Volume ) Shape Solids Liquids Gas Definite amount Definite Unit 9 Lesson 2 What Are the States of Matter? Space ( Volume ) Shape Solids Liquids Gas Definite amount Definite Definite amount Not definite Not a definite amount Not definite Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? What’s the State? A solid is matter that takes up a definite amount of space. Solids also have a definite shape. Your science book is a solid. Ice is also a solid. Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? What’s the State? A liquid is matter that takes up a definite amount of space but does not have a definite shape. Liquids take the shape of their containers. Drinking water is a liquid. Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? What’s the State? A gas is matter that does not take up a definite amount of space and does not have a definite shape. The air around you is a gas. Copyright © Houghton Mifflin Harcourt Publishing Company
Cool! It’s Freezing! When water is cooled enough, it freezes. Unit 9 Lesson 2 What Are the States of Matter? Cool! It’s Freezing! When water is cooled enough, it freezes. Freezing is the change of state from liquid to solid. Copyright © Houghton Mifflin Harcourt Publishing Company
Solid Liquid Gas Melting Evaporation Freezing Condensation Unit 9 Lesson 2 What Are the States of Matter? Solid Liquid Gas Melting Evaporation Freezing Condensation Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Cool! It’s Freezing! Below the freezing temperature, water is a solid. Unit 9 Lesson 2 What Are the States of Matter? Cool! It’s Freezing! Below the freezing temperature, water is a solid. Hail, ice on a lake, and a snowball are examples of solids. Each of these examples is water frozen into a solid. Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Just Add Heat! When water is heated, it gains energy. If ice is heated enough, it melts. Melting is the change of state from a solid to a liquid. Melting is the opposite of freezing. Water melts above 0 °C (32 °F) and freezes below 0 °C (32 °F). Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Just Add Heat! If enough energy is added to water, it boils and changes to a gas. Water boils at 100 °C (212 °F). Water in the form of gas in called water vapor. Water vapor is invisible. Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Now You See It … Liquid water can change to a gas without boiling. This process is called evaporation. Water evaporates from puddles on a warm day. Copyright © Houghton Mifflin Harcourt Publishing Company
Now You See It … What happened to the water? Unit 9 Lesson 2 What Are the States of Matter? Now You See It … What happened to the water? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Now You See It … A gas can change back to a liquid in a process called condensation. When water vapor loses energy, such as on a cold window pane, it changes to a liquid. Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company
Unit 9 Lesson 2 What Are the States of Matter? Copyright © Houghton Mifflin Harcourt Publishing Company