1 Chapter 2Energy and Matter 2.5 States of Matter Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings

2 Solids Solids have a definite shape. a definite volume. particles that are close together in a fixed arrangement. particles that move very slowly. Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings

3 Liquids Liquids have an indefinite shape, but a definite volume. the same shape as their container. particles that are close together, but mobile. particles that move slowly.

4 Gases Gases have an indefinite shape. an indefinite volume. the same shape and volume as their container. particles that are far apart. particles that move very fast.

5 Three States of Matter for Water

6 Summary of the States of Matter Solid Liquid Gas Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings

7 Identify each as: 1) solid 2) liquid or 3) gas. ___ A. It has a definite volume, but takes the shape of the container. __ B. Its particles are moving rapidly. __ C. It fills the volume of a container. __ D. It has particles in a fixed arrangement. __ E. It has particles close together that are mobile. Learning Check

8 Identify each as: 1) solid 2) liquid or 3) gas. 2 A. It has a definite volume, but takes the shape of the container. 3 B. Its particles are moving rapidly. 3 C. It fills the volume of a container. 1 D. It has particles in a fixed arrangement. 2 E. It has particles close together that are mobile. Solution