1. Do NoW activity You need to be silent while you are doing this
Log onto and read over what we will be learning about today.
Start with Activity 1 – Log onto Edmodo and answer the two quick quiz posts.
You need to be silent while you are doing this

2. Chemical changes
Year 8 science

3. Chemical changes
Chemical changes are also known as chemical reactions.
Class brainstorm – What do you already know about chemical changes or chemical reactions? Can you describe some?

4. Physical changes and chemical changes
What do you think the differences are between chemical and physical changes?
Chemical change
Physical change

5. Particles Do NOT change
Physical changes
Change of state
Boiling or evaporation (liquid  gas)
Freezing (liquid  solid)
Condensation (gas  liquid)
Separating things – separating soil of different sizes
Breaking something apart – ripping a piece of paper in half
Particles Do NOT change

6. = Particles are rearranged Chemical changes
When you mix vinegar and bicarb soda together, the particles in vinegar are rearranged with the particles of bicarb soda. =
vinegar
bicarb soda

7. Signs of chemical changes
Change in colour
Change in temperature (gets hotter or colder)
A smell or odour is made
Gas is made (bubbles)
Precipitation (a solid is made)
Example of precipitation

8. experiment
You will be doing 3 experiments to observe the signs of chemical changes
You will be given an experiment sheet OR you can download it from the Weebly site
Do the experiment in your groups
When you have finished your experiment, complete the chemical changes quiz on Edmodo