1. SQRS: On page 20, answer questions 10 & 21.
October 26, 2017
SQRS: On page 20, answer questions 10 & 21.

2. Brain Pop! Be prepared to answer questions at the end of the video.
I can explain the Law of Conservation of Mass

3. change in size, shape or state of matter but not its composition
sublimation
deposition
New materials are not formed.
change in size, shape or state of matter but not its composition
Same materials are present before and after the change.
Physical Change
melting ice
burning wood
cutting hair
baking a cake
dissolving sugar
baking soda reacting with vinegar to produce carbon dioxide
vaporization: liquid changing to a gas
condensation: gas changing to a liquid
sublimation: solid changes to gas
deposition: gas changes to solid
cutting, tearing, grinding or bending

4. substances are changed into different substances
New materials are formed.
color change
odor
gas is produced
formation of a solid
temperature change
not easily reversed
Chemical Change
Leaves changing color
crumpling paper
boiling water
apple exposed to air
carbonation in sodas
baking cake, making pancakes
butter melting
fireworks
metal rusting
rotten eggs, spoiled food
antacid tablet in water
wood changing to ashes & gases

5. Comprehension Check…

6. Physical or Chemical Sort?
On page of your comp. book, draw a T-chart
Chemical Change
Physical Change
Write each of these under the correct heading:
1. Tear Burn
2. Rust Decompose
3. Squeeze Explode
4. Dividing cookie dough
5. Chocolate chips melting on the stove.
6. Brush fire
7. Water forming on the outside of a cold glass
8. A furniture make uses a piece of sand paper to make a chair more smooth.

7. Conservation of Mass
During a chemical change, the particles rearrange to form new substances, but they are not destroyed and new particles are not created.
The number and type of particles remains the same.
This is the Law of Conservation of Mass:
the total mass of the matter is the same before and after a physical or chemical change.

9. Is this a physical or chemical change?

10. Now you do it…
Classwork/Homework: Identifying if the change is a physical or chemical change. Do this on your own. If you have any questions, raise your hand.

11. Exit Ticket Put your first & last name on your exit ticket!
Give 3 examples of a physical change.
Give 3 examples of a chemical change.
Fill in the blanks…
In a chemical reaction, ____________is
neither _______________nor ______________, it is _____________
Into something else.