1. Matter Matter is anything that: a) has mass, and b) takes up space
What are the 3 states of matter?
What are the properties based on which you classify them?

2. SIZE COLOR SHAPE DENSITY TEXTURE SMELL
EXAMPLES OF PHYSICAL PROPERTIES:
SIZE
COLOR
SHAPE
DENSITY
TEXTURE
SMELL

3. These physical changes may be through the following processes:
MELTING
FREEZING
VAPORIZATION
CONDENSATION
SUBLIMATION

4. A. PHYSICAL CHANGES
A change in which physical properties of a substance change, but the substance remains the same. The change is reversible.

5. 1. FLAMMABILITY - the ability to burn
Examples of CHEMICAL PROPERTIES
1. FLAMMABILITY - the ability to burn
2. REACTIVITY - The ability to combine easily with other atoms to form new and different substances.

6. When a chemical change occurs, the bonds between atoms break, and the atoms rearrange to form new and different substances.

7. The properties that describe. how a substance changes into
The properties that describe how a substance changes into other new substances are called
CHEMICAL PROPERTIES

8. a. Chemical changes are often called
“CHEMICAL REACTIONS”

9. (The equation above is not balanced)
b. Example
H2O + O2
H2O2
During this chemical change, the bonds between atoms break and the atoms rearrange to form new and different substances.
(The equation above is not balanced)

10. Properties are… Words that describe matter (adjectives)
Physical Properties- a property that can be observed and measured without changing the material’s composition.
Examples- color, hardness, m.p., b.p.
Chemical Properties- a property that can only be observed by changing the composition of the material.
Examples- ability to burn, decompose, ferment, react with, etc.

11. LAW OF CONSERVATION OF MATTER:
MATTER IS NEVER CREATED OR DESTROYED.(After the chemical change, you have the same number of atoms that you had before the chemical change.)

12. Physical Change
Substance may seem different, but the way the atoms link up is the same.

13. It’s a physical change if
It changes shape or size
It dissolves.

14. It changes phase (freezes, boils, evaporates, condenses)
It’s a physical change if...
It changes phase (freezes, boils, evaporates, condenses)

15. Chemical Change
Changes the way the molecules link up
Makes new substances

16. It’s a chemical change if….
It burns
Temperature changes without external heating/cooling

17. It’s a chemical change if...
It bubbles (makes a gas)

18. It’s a chemical change if...
It changes color
It forms a precipitate

19. Physical vs. Chemical Change
Physical change will change the visible appearance, without changing the composition of the material.
Boil, melt, cut, bend, split, crack
Is boiled water still water?
Can be reversible, or irreversible
Chemical change - a change where a new form of matter is formed.
Rust, burn, decompose, ferment

20. What kind of change is it if someone...
Tears up paper?
Mixes salt and water?

21. What kind of change is it if someone...
Burns paper?
Evaporates salt water?

22. What kind of change is it if someone...
Mixes vinegar and baking soda?

23. Task-3
List out 15 changes that happen around you on a normal day (from the time you wake up till you go back to sleep), classify them as physical / chemical changes , justify each classification.