1. All substances have properties… Including people!
Example:
People can be identified by their …
Face (shape, expressions)
Voice
Height
Finger prints
Eye color
Hair color
Teeth
DNA

2. Physical Properties
Physical properties are physical characteristics that identify the element based on its nature such as:
Melting point: the temperature at which
the solid changes to liquid
State at room temperature: solid, liquid or gas

3. Density: the mass per volume

4. Luster: the ability to reflect light
in a metallic shine
Boiling point: the temperature at which
the liquid changes to a gas
Viscosity: the ease with which a
substance flows.
This is a descriptor of liquids. Water flows more easily and is therefore, more viscous, than honey.

5. Colour
Clarity or Transparency:
the amount of light that can pass through a substance.
Opaque: when no light passes through
Translucent: when some light passes through
Transparent: when all light passes through

6. Malleability: the ability to be hammered
into thin sheets
Ductility: the ability to be drawn into wire
Conductivity: the ability to conduct
heat or electricity
Solubility: the ability to dissolve in water.

7. Physical Properties can be classified as Quantitative or Qualitative:
physical state
melting point
colour
boiling point
odour
density
crystal shape
solubility
malleability
ductility
hardness
brittleness
texture
Qualitative properties describe matter using words. They cannot be measured or expressed numerically (no numbers involved).
Quantitative properties can be measured and expressed numerically (numbers are involved)

8. Chemical Properties
Chemical properties describe how a substance reacts with another substance to form a new substance
Flammability
Rusting
Reactivity with metals
Reactivity
with
oxygen
Reactivity with water
with acids

9. Physical and Chemical Changes
PHYSICAL CHANGES:
do not produce a new substance (it’s still the same substance with same properties)
involve only one substance (except dissolving)
are changes in form (powder, crystal, cubes, granular) or state (solid, liquid, or gas)
most are easily reversible  
Examples of physical changes…
Cutting
Tearing
Grinding
Change in State
Dissolving
Molding (shaping)

10. CHEMICAL CHANGES:
always produce a new substance which has different properties from the starting substance(s)
involve more than one substance
many are not reversible
Examples of chemical changes…
Burning
rusting
eating (saliva action on food)

11. How can we tell if a chemical change has occurred?
Look for clues that a new substance has formed

12. Clues that indicate that a new substance has formed in a chemical reaction are;
colour change (not a blending of the initial colours)
gas (bubbles) is produced (not from boiling)
a solid (precipitate) is formed when two solutions are mixed together
energy is released (usually heat or light) or absorbed (substance feels colder), but not because of heating with a burner or cooling with ice etc.
odour change / new odour

13. Physical or Chemical Change?

14. Physical or Chemical Change?

15. Physical or Chemical Change?

16. Physical or Chemical Change?

17. Physical or Chemical Change?

18. Physical or Chemical Change?