4/24/2012
HW: read p. 75-81;
Option #1: notes on key concepts and vocab.
Option #2: #1-8 p. 81
Describe a solid in terms
of shape and volume
April 23
Matter and Change
liquids
Describe
a liquid
in terms of volume
and shape
A liquid has
◦ a definite volume
but
◦ NO definite shape
All
particles of matter are in
constant motion
Temperature is a measure of
particle speed
Kinetic Molecular Theory
solids
Describe
a solid in
terms of shape and
volume
A solid has
◦ A definite volume
and
◦ A definite shape
Describe
a gas in terms of
volume and shape
A gas has
◦NO definite volume and
◦NO definite shape
gas
Gases
◦ Gas particles are in constant,
random motion
◦ Attractions between gas particles
are too weak to have any effect
◦ So, gas particles don’t effect
each other unless they collide
Kinetic Molecular Theory
1
4/24/2012
Liquids
Solids
◦ Liquid particles are more closely
packed and so attract each other
more than gas particles
◦ Liquid particles “stick” to each
other enough that they don’t fly
off into space but can still flow
past each other
◦ Solid particles have a vibrational
motion only
◦ Solid particles strongly attract
each other so that the particles
are “fixed” in their position and
can not move around
Kinetic Molecular Theory
Kinetic Molecular Theory
Read, know, and follow the rules for role-playing
NO ROUGH PLAY!
1. How will we measure temperature, volume,
number of particles, and pressure? RECORD
THIS INFORMATION IN YOUR JOURNAL!
2. COPY DOWN THE DATA WE GATHER IN YOUR
JOURNAL!
3. Answer the questions in the Post-Activity
Questions in your journal below the data table.
Once you have complete the Human Gas
Particle Post-activity Questions you can
start on Quiz Corrections
On a separate sheet of paper write out
the question and the correct answer for
each missed quiz question
Staple corrected answers to quiz and turn
in
Complete homework: read p. 75-81;
◦ Option #1: notes on key concepts and vocab.
◦ Option #2: #1-8 p. 81
Human Gas Particle Activity
Quiz corrections
9
A Phase Change is the reversible
physical change that occurs when a
substance changes from one state of
matter to another
Solid Liquid Gas
Or
Gas Liquid Solid
Phase Change
2