1. Physical Science Objective 5.03
Phases of Matter
Physical Science
Objective 5.03

2. Solid A solid is a substance that holds its shape
The particles that make up a solid substance have low kinetic energy and are packed tightly together

3. Solid Particles

4. Liquid A liquid is a substance that holds its shape in a container
The particles that make up a liquid substance have an increased kinetic energy and are able to spread further apart

5. Liquid Particles

6. Gas A gas is a substance that does not hold its shape
The particles that make up a gas substance have high kinetic energy and are able to move freely in the space available to them

7. Gas Particles

8. Phase Changes
Substances change from one state of matter to another as heat is added to the substance
The absorption or release of heat leads to a change in kinetic energy of the substances particles
As the kinetic energy of particles changes the state of matter changes

9. Phase Change: Solid -> Liquid
As heat is added to a solid, the solid will begin to melt
Every solid has a different temperature at which it melts. This temperature is called the melting point

10. Phase Change: Liquid -> Gas
As heat is added to a liquid, the liquid will begin to vaporize
Every liquid has a different temperature at which it vaporizes. This temperature is called the boiling point

11. Phase Change Diagram
Boiling Point
Melting/Freezing Point

12. States of Matter along a Phase Change Diagram

13. http://8science. files. wordpress. com/2009/01/image008. jpg 2