Properties of Matter

Which animal matches the definition: “a small domestic mammal?”

CATCAT

Raise your hand and give one characteristic of a cat.

Definition: to state meaning; show clearly the form

Describe: represent in words; give a detailed account

Physical Property: can be observed with out changing the composition of matter, “Observable”

Examples: color, taste, odor, hardness, melting point, boiling point, conductivity, density

Intensive Physical Property: independent of amount of matter present (sample size)

Examples: density, color, melting point

Extensive Physical Property: depends on the amount of matter present

Examples: mass, volume, length

Chemical Property: observed only when the substance interacts, “Behavioral”

Examples: flammability, combustibility, reactivity, corrosion

a. Physical Intensive

b. Physical Extensive

c. Chemical

_____ 1. color

_____ 2. tendency to rust

_____ 3. boiling point

_____ 4. density

_____ 5. mass

_____ 6. ability to burn

_____ 7. malleability

_____ 8. length

a

c

a

a

b

c

a

b

Physical Change: a type of change that alters the physical properties of a substance but does not change its composition.

Example: tear, bend, grind, crumple, split, crush

Also includes changes in state: melt, freeze, boil, condense

Chemical Change: a process involving one or more substances changing into new substances; also called a chemical reaction.

Examples: explode, rust, oxidize, corrode, tarnish, ferment, burn, or rot

1. ↑ or ↓ in Temperature.2. Release of a gas.3. Change in color (that you did not cause).4. Production (or change) in odor.5. Formation of a precipitate.

Precipitate: an insoluble solid that separates from a solution.

1. Burning Gasoline

2. Magnesium burning in Oxygen

3. Cracking an egg open

4. Nitroglycerin exploding

5. Freezing water

6. Methane melting

7. KCl + AgNO3 → Solid AgCl

8. Water Boiling

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Chemical

Chemical

Physical

Chemical

Physical

Physical

Chemical

Physical

Mrs. D has placed on object in the front of the room. Observe this object carefully. On the index card write down your name, the object, and answer the following:

1. Name one physical property. Is it intensive or extensive?2. Name one chemical property.3. Name one way this object could be changed physically?4. Name one way this object could be changed chemically?