Changing Physical States

1. Changing States
3.5C

2. Changing States Vocabulary
matter
gas
freezing
solid
liquid
heat
evaporating
temperature
conductor
insulator
melting

3. Matter
Matter is anything that has mass
and takes up space.

4. Solids
 Solids have a
definite shape and
volume.
 Solids have mass.
 Solids take up
space.

5. Liquids
 Liquids have a definite
volume but no definite
shape.
 Liquids take the shape
of their container.
 Liquids have mass.
 Liquids take up space.

6. Gasses
 Gasses have no
definite shape or
volume.
 Gasses spread out to
fill the entire space
given.
 Gasses have weight.
 Gasses take up space.

7. States of Matter
What does it take for matter to move from
one state to another?

8. Energy determines the state!
SOLIDS
LIQUIDS
GASES
+
Energy
+
Energy

9. Add or Subtract Energy. . .
When energy is added, particles move faster!
When energy is removed, particles move slower!

10. • Measure of the
movement of
molecules (tiny
particles) in matter
• Measured using a
thermometer or
temperature probe
• Scientists use the
Celsius scale to
measure temperature

11. What will happen if heat
is added? Why?

12. Solid + Energy = ?
 When energy is
added to solids, they
become liquids!
 Examples?

13. Liquid + Energy = ?
 When energy is
added to liquids,
they become
gasses!
 What examples can
you think of?

14. Changing States
 There are several names for matter changing
states:
 State change
 Phase change
 Physical change

15. Ice changes to water—water changes
to ice, frozen water is still water

16. Water changes to steam, a gas, when it is
heated to its boiling point, water vapor
condenses to form a liquid

17. Changes in State (phase changes)
1.Melting - solid to liquid
2.Freezing – liquid to solid

18. Changes in State (phase changes)
3.Evaporating – liquid to gas
4.Condensing - gas to liquid

19. So, did we get something new?
 Ice cream and melted ice cream?
 Chocolate and melted chocolate?
 Ice, water, and water vapor?
 Steel and molten steel?