1. Physical Properties Physical Changes
All matter has physical and chemical properties.
Physical Properties - A description of a substance (Ex. Colour, Smell, Taste, Solid, Liquid, Gas) that does not involve forming a new substance.
A change of state, (solid -> liquid-> gas, such as melting) or a change in form that does not alter the chemical properties of a substance is called a Physical Change.

2. Physical Properties Review
__________ - how much a solid resists being scratched or dented
__________ - a substance can be hammered or bent into different shapes. If they shatter instead they are brittle.
__________ - a substance can be drawn out into a wire
__________ the solid form of many minerals in which you can see a definite structure of cubes or blocks with a regular pattern
__________ the ability of a solute to dissolve in a solvent
__________ how easily a liquid can pour. The thicker the liquid is the more _________________it is.
__________is the amount of matter per unit volume of that matter. (Expressed in kg/m3, g/cm3, g/mL, g/L)
Hardness
Malleability
Ductility
Crystal Form
Solubility
Viscosity
viscous
Density

4. CHEMICAL PROPERTIES CHEMICAL CHANGES
Chemical Properties – a description of what a substance does as it changes into one or more new substances.
Chemical Change - A characteristic that occurs when
a substance changes into a new substance.
- This change is called a Chemical Change.
Ex. When baking soda is added to vinegar a
new substance (carbon dioxide) is formed.
This reaction with vinegar is a chemical property of baking soda.
The starting materials in a reaction (baking soda & vinegar) are called the REACTANTS.
The new materials that are produced (CO2 & H2O) are called the PRODUCTS.

5. Physical and Chemical Changes
5.1
Visible Change (Evidence)
Example
Picture
A new colour appears.
universal indicator turning purple in a base
Heat or light is produced or absorbed.
firefly lighting up
Bubbles of gas are formed.
fizzing tablet in water
A solid material (a precipitate) forms in liquid.
Lead (II) Iodide forms when Lead ((II) Nitrate and Sodium Iodide are mixed
The change is (generally) difficult to reverse.
a candle burning
physical property
chemical property