Physical and Chemical Properties and Changes Guided Notes

1. Matter is anything that takes up SPACE and has MASS.

2. You can observe matter easily with your SENSES.

3. The only thing that wouldn’t be matter would be ENERGY, because it doesn’t have

MASS or VOLUME.

4. A physical property is a property that can be EASILY OBSERVED without changing the

IDENTITY of the substance.

5. Examples of physical properties:

A. SOLUBILITY of a substance is its ability to DISSOLVE.

B. CONDUCTIVITY is a material’s ability to ALLOW HEAT OR ELECTRICITY TO FLOW.

C. MALLEABILITY of a substance is its ability to be HAMMERED INTO A THIN SHEET.

D. MELTING and FREEZING points are the TEMPERATURES at

which a SOLID becomes a LIQUID and a LIQUID becomes a SOLID.

E. DENSITY of a substance is a measure of how CLOSE together its PARTICLES are.

6. A PHYSICAL change is a change in the APPEARANCE, without changing the

IDENTITY of the material. It can be REVERSIBLE or IRREVERSIBLE.

7. It is a physical change if:

 IT CHANGES SHAPE OR SIZE

 IT DISSOLVES

 Or THE SUBSTANCE CHANGES PHASE

8. A chemical property is any ability to produce a CHANGE in the IDENTITY of matter.

9. Examples of chemical properties:

 FLAMMABILITY: MATERIAL’S ABILITY TO BURN IN THE PRESENCE OF OXYGEN

 REACTIVITY: HOW READILY A SUBSTANCE COMBINES WITH OTHER SUBSTANCES

 CORROSIVE: EATING AWAY, SUCH AS A METAL BY ACID [Type text] [Type text] [Type text] 10. CHEMICAL changes occur when a substance REACTS and forms

ONE OR MORE NEW SUBSTANCES.

11. You know a chemical change has occurred when there is:

 A CHANGE IN COLOR OR ODOR

 PRODUCTION OF A GAS

 FORMATION OF A PRECIPITATE

 ABSORB OR RELEASE ENERGY (GETS HOT OR COLD OR LIGHT IS GIVEN OFF)

12. Examples of chemical changes:

 BURNING OR COMBUSTION: COLOR CHANGE, ODOR CHANGE, PRODUCES A GAS, GETS HOT

 CORRODING: COLOR CHANGE

 RUSTING: COLOR CHANGE

 MOLDING: COLOR CHANGE, ODOR CHANGE

 DECAYING: COLOR CHANGE, ODOR CHANGE

 DECAYING: COLOR CHANGE, ODOR CHANGE, PRODUCES A GAS, RELEASES ENERGY

13. Identify each example on the slides as a physical or chemical change and explain how you know: A. PHYSICAL: BECAUSE THE RIBBON IS STILL A RIBBON; IT DIDN’T CHANGE IDENTITY

B. CHEMICAL: BECAUSE IT CHANGES WOOD TO ASH; COLOR CHANGE, SMOKE PRODUCED, GETS HOT

C. PHYSICAL: BECAUSE SNOW IS MADE OF WATER EVEN AFER IT MELTS; DIDN’T CHANGE IDENTITY

D. PHYSICAL: BECAUSE ICE IS MADE OF WATER EVEN AFTER IT MELTS; DIDN’T CHANGE IDENTITY

E. CHEMICAL: IT IS BUBBLING, PRODUCING A GAS

F. PHYSICAL: IT’S STILL A WALL, JUST PAINTING IT DOESN’T CHANGE ITS IDENTITY