1. Properties and changes
Both Physical and Chemical

2. Learning goals
We are learning to identify physical and chemical properties.
We are learning to identify physical and chemical changes.

3. Physical property
describes a characteristic of a substance that can be observed or measured

4. Physical properties of water
cohesion – water sticks to itself
forms beads on non-adhesive surfaces
adhesion – water sticks to other substances
allows you to mop up water with a towel

5. Drip, drip, drip …
Complete the penny/water activity please!

6. Physical properties

7. Make a chart like this …
Physical Property
Description
Examples

8. Colour and lustre
Light a substance reflects gives it a colour and lustre
Gold is shiny
Concrete is dull

9. conductivity Ability of a substance to conduct electricity or heat
Conductors – most metals (copper used for electrical wires)
Insulator – little or no conductivity (Styrofoam and glass)

10. density The amount of mass in a given volume of a substance
Density of pure water is 1.0 g/mL
Water is denser than oil, so oil floats on water
Mass = Density X Volume

11. ductility
Any solid that can be stretched into a long wire
copper

12. hardness Substances ability to resist being scratched
Diamond is the hardest

13. malleability A substance that can be pounded or rolled into sheets
Aluminum foil, gold and tin

14. viscosity The resistance of a fluid to flow
Syrup has a high viscosity compared to water

15. Chemical properties
describes the ability of a substance to change into a new substance(s)
Absorbs heat during reaction
Combustible
Forms gas when heated
Reacts with acid
Reacts with water
Emits heat during reaction
Emits light during reaction
Forms a precipitate (solid) in a solution

16. Physical change
the matter involved can experience a change in one of the following criteria:
Change in SIZE (cutting a gold block in half)
Change in SHAPE (making a paper airplane)
Change in STATE (ice cube melting)
Making a SOLUTION (salt dissolved in water)
No new substance is made, and all changes are reversible.

17. Chemical change always results in the formation of a new substance(s)
chemical reaction
evidence of a chemical change include:
Colour change
Odour change
Temp change
Production of light
Formation of precipitate
Production of gas (bubbles)

18. Learning goals
We are learning to identify physical and chemical properties.
We are learning to identify physical and chemical changes.

19. Please Complete
Textbook 5.2 #1-5.