Physical Science
Do Now
February 23rd 2011
Copy the following energy diagram:
Tightly packed,
in a regular
pattern
Vibrate, but do
not move from
place to place
Close together
with no regular
arrangement.
Vibrate, move
about, and
slide past each
other
Well separated
with no regular
arrangement.
Vibrate and
move freely at
high speeds
Has no definite
volume or
shape and is
composed of
electrical
charged
particles
SWBAT identify the changes of state, between solid,
liquids, and gases, in matter
Elements
Draw this chart!
Pure
Substances
Compounds
Matter
Homogeneous
Mixtures
Heterogeneous
Phases Changes
• Phase changes require that a substance absorb
energy or release energy to occur.
• There is NO Change in Temperature
associated with a phase change!
• Different words are used to denote direction
when dealing with a phase change.
PHASE CHANGES
Description of
Phase Change
Solid to
liquid
Term for Phase
Change
Melting
Liquid to
Freezing
solid
Heat Movement During
Phase Change
Heat goes into
the solid as it
melts.
Heat leaves the
liquid as it
freezes.
PHASE CHANGES
Description of
Phase Change
Liquid to
gas
Term for Phase
Change
Vaporization,
which includes Heat goes into the
boiling and
liquid as it vaporizes.
evaporation
Gas to liquid Condensation
Solid to gas
Heat Movement During
Phase Change
Sublimation
Heat leaves the gas
as it condenses.
Heat goes into the
solid as it sublimates.
*Boiling & freezing points depend on the pressure.
Phase Diagram
WaterSteam
120
Steam
100
Water
Ice - Water
0
-5
Ice
Alta Physics
What are properties?
• Matter has observable and measurable
qualities.
• We can use general properties to identify
substances.
• Two basic types of properties of matter:
Physical properties and Chemical
properties:
Physical Properties
• Physical properties are used to identify,
describe and classify matter.
– Characteristic of a substance that can be
observed (using your senses) without
changing the substance into something
else.
Hardness
Texture
Color
Odor
Taste
Temperature
More EXAMPLES Physical
• size, shape, freezing point, boiling
point, melting point, magnetism,
viscosity, density, luster and many
more.
– Viscosity - The resistance of a liquid to
flowing.
– Examples:
– Low viscosity-water, rubbing alcohol
– High viscosity-honey
Chemical Properties
• Chemical properties are characteristics
involved when a substance interacts
with another substance to change its
chemical make-up.
Flammability
Rusting
Creating a
Reactivity with
new chemical
water
product
Creating gas
bubbles
pH
Classwork & Homework
• Complete ‘Phase
Changes’ worksheet
• Copy all definitions
and summary from
Chapter 2 Section 2
– Pages 45 – 52
– Summary on page 52
• Homework
– Complete ‘Concept
Review’ worksheet
(both sides)