Okay, let’s think about the
following…
Sand Paper T.P.
Brick Pillows
Furry Dishes
Rubber Knife
Glass Basketball
Structure - Function
THEY HAVE TO AGREE!!!
So how do we make that happen?
By observing the
PHYSICAL PROPERTIES!
A PHYSICAL PROPERTY is a characteristic that
can be observed or measured WITHOUT
changing the identity of the matter.
That’s important, write it down!
We observe properties in two
different ways.
Round
Gray
Rough
Solid
8 cm long
125 grams
22 holes
Can you tell the difference???
That’s important, write it down!
Qualitative Observations - QL
We observe quickly and easily with our …
That’s important, write it down!
Quantitative Observations - QN
Some observations we have to work for…
A Quick Way to Remember
QLook (our senses)
QNumbers (count or measure)
You may want to add this to your notes!
Let’s Learn Some Physical Properties
You will be learning about 15 important physical
properties that help us determine what an unknown
material is or how we should use a material.
For each property you need to write four things.
1.
2.
3.
4.
The name
QN or QL
The definition
An example or sketch
COLOR
How an object reflects light
LUSTER
How shiny it is
Any guesses?
What property
could this be?
SHAPE
The form of the object
TEXTURE
How something feels
Soft
Hard
Slick
Fluffy
Wet
Smooth
Rough
Warm
LENGTH
Measurement from one point to another point
Practice
• Teacher model on the document camera.
INCHES DO NOT EXIST IN SCIENCE!!!
• Students, what is the EXACT width of your desk?
MASS
Amount of matter something is made of
•
How is it measured?
Practice
• Teacher model how to use a triple beam balance.
• What is the mass of the object on this scale?
• Students. What is the mass of your tissue box?
VOLUME
Amount of space taken up
LxWxH
Water Displacement
Practice
• Teacher model volume of a regular shaped object.
• Students, what is the volume of your tissue box?
Practice
• Teacher model volume of an irregular shaped
object.
• Students, what is the volume of the objects
below?
DENSITY
Mass per unit volume of a substance (mass
I love density:
Very dense
mass
volume
m
V
Not as dense
volume)
Demonstration
• Colorful Columns – draw a column tower and
predict how the following liquids will layer based
on their densities:
Water
Oil
Corn syrup
Rubbing alcohol
STATE
Physical form in which a substance exists
• SOLID
LIQUID
GAS
PLASMA
Sketch
Thermal Conductivity
The rate at which a substance transfers thermal
(heat) energy.
GOOD
POOR
SOLUBILITY
Ability of a substance to dissolve in another
substance
• Dissolves
Will not dissolve
DUCTILITY
(can you tell)
Ability of a substance to be pulled into wire
Demonstration
• Silly Putty
MALLEABILITY
(ever heard of a mallet???)
Ability of a substance to be rolled or pounded
into sheets such as…
ELASTICITY
Ability to return to original shape
HARDNESS
How easily it can be scratched
Practice