1. Bellringer
Copy the chart and then walk around the room to find the correct answers.
Physical Change or Chemical Change?
Writing on paper
Making lemonade
Puddle drying up
Leaves burning
Breaking a window
Frying bacon
Fireworks exploding

2. Review Physical and Chemical Changes

3. Predict, Observe, Explain
Cutting paper, molding playdoh, baking soda and vinegar without balloon, baking soda and vinegar with balloon

4. Let’s read about it…
Read pages on The Law of Conservation of Mass
Try to answer these questions as you read…
Are the ashes left behind by a fire the same mass as the wood was before?
If not, where else does the mass go?

5. Law of Conservation of Mass
Study Pack #8

6. Conservation
What does this word mean?
Where have you heard it before?

7. Law of Conservation of Mass
The mass of what you end with is always the mass of what you started with
In physical AND chemical changes

8. Law of Conservation of Mass
Where does it go?
Page 85
Sometimes the mass we think has disappeared is now in the form of a gas
Example: burning wood or boiling water

9. Law of Conservation of Mass
Mass is not created or destroyed during physical or chemical changes
Page 86
The particles in substances only rearrange to form new substances
Like you rearrange building blocks to make something new!

10. Today’s Target….What was it?
Write your own target for today.
What was it we wanted to learn from this lesson?
Start out with “I understand…”