1. Energy – Physical Changes

2. Transfer vs. Transformation
Using a burning log as an example, describe the difference between:
Energy transformation: is the changing of energy from one form to another
log (chemical E) + oxygen (O2)  radiant E + thermal E Combustion reaction
Energy transfer: the movement of energy from one place to another
Ex: transfer of thermal energy (heat) from the burning log to people
Transfer of thermal energy occurs from a place with the highest temperature to a place with the lowest temperature

3. What do you think? Sun`s radiant energy shining on a plant
Transfer
Chemical energy of an apple in relation to the human eating it
Transformation
Mechanical energy of falling water on a water wheel

4. Physical Changes
A physical change through energy, causes a physical change does not affect the nature or the characteristic properties of matter
Types:
Phase change
Dissolution
Deformation

5. Make a list of verbs that represent physical changes
Examples include: cutting, grinding, bending, the melting of the metal gallium, the freezing of water and the condensation of steam to water.
Boil, freeze, dissolve, melt, condense, break, split, crack, grind, cut, crush and bend.

6. Phase Change Transformation from one state (or phase) to another
For examples: ice melts, changes from a solid to a liquid.

7. Particle Model
Solid: particles are very organized, strong forces of attraction hold things together
Liquid: close together but not organized, weaker connections
Gaseous: far apart, and not organized, no forces of attraction

8. Absorb or release Liquid water + energy  water vapour
Transformation of liquid to vapour absorbs energy
The water particles absorb the energy from the heat source making them rapid then using that energy to change to vapour
Liquid water  ice + energy
Transformation of liquid water into ice releases energy