1. Investigating Matter
Section 1.2 pages 16-27

2. What is Matter?
Matter: everything and anything that has a mass and volume Mass: the amount of matter in a substance or object Volume: the amount of space a substance or object takes up

3. Chemical change
A change in matter when substances combine to form new substances Takes place on molecular level; chemical bonds are broken and formed
Ex. fireworks
What other examples can you think of?

4. Physical changes
A change in matter where the appearance may change but NO new substance is formed (the material itself is the same before and after the change) Involves energy and states of matter Ex. when ice or snow melts into water (change in state)
What other examples can you think of?

5. The particle model of matter
Describes the behaviour of matter
All matter is made up of particles
There are spaces between these particles
These particles are constantly moving
Particles are attracted to each other. The strength of attraction depends on the type of particle

6. The kinetic molecular theory (KMT)
Recall from Science 8

7. KMT
Kinetic energy is the energy of motion
Particles move so they have kinetic energy
This theory explains what happens when the kinetic energy of particles change
 Energy makes particles move! (more energy particles have = faster they move; less energy particles have = slower they move)

8. Think , pair, share (30s)
Using the KMT, describe the behaviour of particles as energy is added?
Using the KMT, describe the behaviour of particles as energy is lost?
Give examples

9. Temperature and changes OF state
How many blanks do you remember from grade 8???

10. Describing matter
Physical properties are characteristics of matter that can be observed or measured
Qualitative properties: describe but DON’T measure
The bowling ball is heavier than the basketball
Quantitative properties: characteristics that can be measured numerically
The red ball weighs 5 g

11. Qualitative or quantitative?
The temperature increased by several degrees
The temperature increased by 2° C
The water is lukewarm
The water was cooler than the oil
The colour changed from blue to green
The sound became louder as the vibrations increased
The 60 W bulb was brighter than the 40 W bulb
The flight lasted nine minutes
Only #2 and #8 are quantitative, all others or qualitative

12. Physical properties of matter
Qualitative:
State (S,L,G)
Colour
Malleability (ability to be beaten into sheets)
Ductility (ability to be drawn into wires)
Crystallinity (shape or appearance of crystals)
Magnetism (tendency to be attracted to a magnet)
Quantitative:
Solubility (ability to dissolve in water)
Conductivity (ability to conduct electricity or heat)
Viscosity (resistance to flow)
Density (ratio of material’s mass to its volume)
Melting/freezing point (temperature of melting/freezing)
Boling/condensing point (temperature of boiling/condensing)
Refer to Table 1.1 pg. 22

13. Pure substances
A substance that is made up of only one kind of particle