1. Unit 2 Day 9
Thursday October 12th

2. Phases of Matter Drill Rewrite sentences and fill in the blanks:
When a _______ is cooled to its freezing point, it changes into a __________.
When a _______ is warmed to its melting point, it changes into a _______.
For a specific kind of matter, the freezing point and the melting point occur at the same ________.
WORD BANK: SOLID, LIQUID, TEMPERATURE

3. Solid is heated past melting point, it becomes a liquid
Liquid is cooled to freezing point, it becomes a solid

4. Melting Point = Freezing Point Temperatures
Different for various types of matter:
Specific Type of matter
MP = FP
(at sea level = 1 atmosphere)
Oxygen
°C = °F
Water
0˚C = 32˚F
Mercury
-38˚C = ˚F
Lead
621˚C = 1,149.8 ˚F

5. gas is cooled past condensation point, becomes a liquid
Liquid is heated past boiling point, it becomes a gas

6. Boiling Point = Condensation Point Temperatures
Different for various types of matter:
Type of matter
Boiling point temperatures
(at sea level = 1 atmosphere)
Oxygen
-183 °C = -297 °F
Water
100˚C = 212˚F
Mercury
357˚C = 674˚F
Lead
1749˚C = 3180˚F

7. Matter at the Chemistry Scale
Mixtures
- homogenous
- heterogeneous
Pure Substances
- Compounds  molecule is smallest or
- Elements  atom is smallest

8. Mixing different phases of matter
Solid with Liquid:
- Homogenous: salt and water
- Heterogeneous: sand and water
Solid with gas:
- Homogenous: orange flame
- Heterogeneous: plastic bag blowing in the wind
Liquid with gas:
Homogenous: mist
Heterogeneous: spittle!

9. Mixing same phases of matter
Liquid with Liquid
Homogenous: vinegar with water
Heterogeneous: oil and water
Solid with solid
Homogenous: sugar and salt
Heterogeneous: salt crystal
Gas with gas
Homogenous: all mixtures of gases!

10. Soda Pop lab
Separating a mixture of liquid and solid by using their different boiling points.
This is called DISTILLATION!