CLASS RULES:
1. Raise your hand if you want to answer.
2. Listen to your teacher.
3. Respect other’s opinions and ideas.
4. Don’t laugh at your classmates when they
make mistakes.
5. Minimize your voice and speak kind words.
6. Come to class on time.
CLASSROOM AUCTION
CLASSROOM AUCTION
CLASSROOM AUCTION
RECAP
1. What is matter?
2. What is mass?
3. What is volume?
4. Give at least 3 properties of matter.
WHAT IS
MATTER
MADE OF?
• Leucippus and his disciple, Democritus,
believed that matter consisted of small
“uncuttable” particles called “atomos”, a Greek
word which means indivisible particle.
• atoms are indestructible and completely full, so
there is no empty space.
• John Dalton presented concrete evidence that
all matter is made of very small particles
called atoms.
• They are not indivisible, rather they consist of
still smaller particles (proton, neutron,
electron)
The images in a
pointillist painting
appear continuous
but if one looks
closely, the images
are actually made
of small dots.
Atom is the smallest particle of an element that
has all the properties of the element.
Atoms are too small to observe. These particles
cannot be seen under the high-powered light
microscopes used in school laboratories. The
size of an atom is measured in angstroms.
Molecule is a particle consisting of two or more
atoms combined together in a specific
arrangement. It is the smallest particle of an
element or compound that can exist
independently.
Scanning Tunneling
Microscope
• can magnify an image 10
million times
Electron
Microscope
• can magnify an
image up to 1
million times
Light
Microscope
• can magnify an
image only about
1,500 times
REBUS
PUZZLE
+
________
+
CHEMIST
THREE
T _
Y
_C _H _E _M _I _S _
+
_____
+
SOUL
LID
_S _O _L _I D_
+
______
+
LEAK
WEED
_L _I _
Q _
U _
I _
D
G G
+
ASK
_ _ _
G G
+
G
ASK
US
_
G _
A _
S
PARTICLE
MODEL OF THE
THREE STATES
OF MATTER
Direction: Identify if the picture is
solid, liquid, or gas.
SOLID
SOLID
GAS
SOLID
SOLID
SOLID
LIQUID
LIQUID
LIQUID
SOLIDS have definite shapes and
volume because the particles are
packed closely together in fixed
positions.
• Particles vibrate in a fixed
position
• Fixed shape
• Fixed volume
• Cannot be compressed
In LIQUIDS, the particles are closer
to one another, nudging one another
as they move. Since the particles are
closer to one another, the attraction
between particles is stronger than
those in gases.
• Particles roll over each other/flows
• Takes on shape of the container
• Fixed volume
• Cannot be compressed
GASES take the shape of the container
because the particles are able to move
freely to all parts of the container. They
move freely because they are far apart
and there is negligible attraction between
them.
• Particles move freely with high energy
• Fills the container
• No definite chape/volume
• Can be compressed
Materials:
• 2 cups tap water
• 1 piece white plastic cup
• 1 plastic or paper plate
• ½ cup rock salt
• ½ cup sand food coloring (blue, green,
or red)