1. Physical & Chemical
Properties & Changes

2. - odor -magnetism without Examples of physical properties: - color
1. A physical property can be observed or measured _______________ changing the matter’s identity.
Examples of physical properties:
- color
- odor
-magnetism
without

3. Thermal Conductivity State Density Solubility Ductility Malleability
Physical Property
Description
Example
Thermal Conductivity
State
Density
Solubility
Ductility
Malleability
the rate at which a substance transfers heat
Plastic foam is a poor conductor
physical form in which a substance exists
ice, liquid water, steam
mass per unit volume of a substance
Lead is very dense
ability of a substance to dissolve in another substance
Sugar dissolves in water.
ability of a substance to be pulled into a wire
copper – used to make wiring
ability of a substance to be rolled or pulled into thin sheets
Aluminum- used to make foil

4. II. Chemical Properties
describe
1. Chemical properties _____________ matter based on its __________________
___________________________________.
For example:
Flammability is a chemical property of wood because when it is burned, ash & smoke are created. (which are new substances with different properties)
ability to change
into new matter having different properties

5. Other Chemical Properties
Chemical Property
Description
Examples
Flammability
Reactivity
The ability of a substance to burn
wood, paper
The ability of two or more substances to combine and form one or more new substances
Iron reacts with oxygen in the air forming
iron oxide, or rust.

6. Characteristic Properties
Scientists rely on characteristic properties to ___________ and _____________ substances.
Characteristic properties are _____________
_____________________________________.
classify
identify
properties
that are most useful in identifying a substance

7. Why are characteristic properties useful for identifying a substance?
-because they are always the same
regardless of the size of the sample.
Two examples of physical characteristic properties are _________ and ____________.
Two examples of chemical characteristic properties are ________________ and _____________.
density
solubility
flammability
reactivity

8. Physical Changes
A physical change is a change that affects _____ _______________________________________. Physical changes _________________________ ___________________________________ Examples of physical changes include __________ and ____________.
one
or more physical properties of a substance
do not change the identity
of the substance
melting
being crushed or smashed

9. Chemical Changes 1
more
A chemical change happens when ____ or ____ substances are ___________ into ___________ _______________ that have ______________ and ____________ properties. Examples of chemical changes are: burning souring rusting spoiling
changed
new
substances
new
different

10. Signs that a chemical change has occurred:
change in color or odor
production of heat
fizzing or foaming
sound or light being released
cannot
Most chemical changes ________________be reversed.

11. The most important question to ask yourself to determine what kind of change has occurred:
Did the composition of the substance change?
What do we mean by composition?
The composition of an object is ____________
______________________________________
______________________________________.
the type of
particles (matter) that makes up the object and the way that the particles are arranged

12. Comparing Physical & Chemical Changes
Physical Changes
Chemical Changes
does NOT change the substances composition
no new substance(s) formed
can usually be reversed
composition of substance IS changed
one or more new substances formed
new substance(s) have completely new & different properties after the change
usually NOT reversible