# Lesson 4 Properties of Matter

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```					  Properties of Matter

Anything in red type or on a red slide, you do not
need to put into your notes. Everything else, you are
expected to put into your notes.
Pre-Assessment Questions
   What is matter?
   Can you give an example of matter?
   Are mass and volume the same thing?
   What is density?
Matter – anything that
takes up space and
has mass
Which of these are matter?
   You              Water
   Table            Air
   Dog              Carbon dioxide
   Pop              Light
   Everything in the universe is
either MATTER or ENERGY.
Matter has physical properties.
   Physical properties – characteristics that
can be used to identify and describe
materials. Any property that can be
observed or measured is a physical
property.
   Examples include: color, shape,
brittleness, density, length, width, height,
mass, and volume.
Science uses the
metric system to
measure.
Measuring Mass
   Mass is the amount of matter (number of
atoms) in an object.
   Mass does NOT change unless you add or
subtract matter.
   In this demonstration, how could I change
the mass of the water?
  We measure mass with a
balance scale.
Steps in using a triple-beam
balance:
1. Carry the scale carefully
using both hands. (They
2.   Zero the scale - first move all
the masses to the zero
position, see if the line is at
zero. If not, gently turn the
knob at the end and allow it
to balance. Repeat until the
line is at zero.
3.   Put the object on the pan.
4.   Move the masses until the
lines are lined up.
5.   Record the total mass.
Practice using the triple beam
balance scales.
   Get a partner and one scale for both of you
to use.
   Zero the scale.
   Take turns measure the masses of objects
such as a pen or pencil, a planner, a ruler, a
glue stick, or other reasonably small object.
   When you are both confident in using the
scale, call your teacher over to test you.
 Mass is measured in grams.
 1000 grams = ____ kilogram

 1 gram = ____ milligrams
Measuring Volume

 Volume   is the amount of space
an object occupies.
 Solids and liquids have a
definite volume – that means
you can’t change it without
 Gases  can compress or expand
to the size of their container,
so their volume can change;
it’s NOT definite.
 Watch the demonstration.
Which type of matter can be
squeezed into a smaller space?
We measure the volume of
cylinder.
of glass and will break if
with them!!
cylinder:
1.Put the liquid in it.

2.Place it on a flat surface.
3.   Get down to read it at eye
level.
4.   Read it at the bottom of
the smile (meniscus).
cylinder
   With a partner, get a graduated cylinder.
   Try to get exactly 50 ml of water in it.
   Have your partner check you.
   Repeat for different amounts until both of
you are confident in using it.
   Call your teacher over to quiz you.
 Volume   is measured in liters.
 1000 liters = ____ kiloliter

 1 liter = ____ milliliters
We measure volume of a
regular solid by using math.
 Tofind the volume of a box
you multiply length times
width times height.
V = l x w x h
Example:
 A box has a length of 10 cm, a
width of 5 cm and a height of 2
cm. Find volume.
V = l x w x h

 V = 10 cm x 5 cm x 2 cm

 V = 100 cm3

 cm times cm times cm = cm3
Time to try finding volume in a
mini lab!
   Get a partner and find the volume of at
least 2 of the boxes in lab.
   Write down each measurement and your
The Box Volume Lab
   Get the lab sheet and follow the
instructions carefully!

   Link to the lab sheet!
We find volume of an irregular solid
using the submersion method:

    An example of an irregular solid is a rock.
    To find its volume:
1.   Put water into a container such as a
2.   Note how much water there is.
3.   Put the object in and the water rises.
4.   Note how much the water rose and that’s the
volume.
Why does this work?
   Since volume is the amount of space an
object takes up, when you put an object
in water it displaces the water. This
means that the water still takes up the
same amount of space for itself plus the
amount of the object, so the water rises
the amount of the volume of the object.
Time for you to try in lab.
   With a partner find the volume of one or
two of the irregular objects.
   Call your teacher over when you are
confident you know what you are doing.
Okay, now that you understand
mass and volume, let’s put them
together.
   Which weighs more – a pound of feathers
   Actually, they weigh the same. But which
takes up more space?
Density
   Density is a measure of how closely
packed the atoms are in a substance.
   density = mass divided by volume
   d = m/v
An example:
   An object has a mass of 30 grams and a
volume of 6 milliliters. What is its density?
   m= 30 g      v= 6 ml
   d=m/v        d= 30g/6ml
   d=5 g/ml
You try a couple density problems!

volume=20 ml      1.   5 g/ml
2.   mass=7 grams,     2.   .5 g/ml
volume=14 ml      3.   8 g/ml
3.   mass=40 grams,
volume=5 ml
Time for a lab!
Density Lab 1

Get a partner.
Open a new spreadsheet and write
down the question.
 Question: How do you think we
could find out the density of water?
Next do background research, and a
hypothesis.
how to do this lab.
And then everyone can do the lab after
we agree on the experimental
procedure.
Density Quiz
1.   What is the equation for density?
2.   I have two cube shaped objects that
have identical volumes. Cube A has a
mass of 100 grams and cube B has a
mass of 70 grams. Which cube has a
higher density?
3.   A box has a mass of 20 grams and a
volume of 5 cm3. What is its density with
units?
4.   A sample of liquid has a volume of 7 ml
and a mass of 35 grams. What is its
density?
5.   I have a liquid of unknown density. What
two pieces of lab equipment would I use
to find density?
6.   I have a box of unknown density. What
two pieces of lab equipment would I use
to find density?
7.   I have an oddly shaped rock of unknown
density. What two pieces of lab
equipment would I use to find density?
1.   d=m/v
2.   Cube A
3.   4 g/cm3
4.   5 g/ml
5.   Graduated cylinder and balance scale
6.   Ruler and balance scale
7.   Graduated cylinder and balance scale
(and maybe a beaker)
Density Lab 2
 Open a new spreadsheet and type in
the problem: Rank the five objects in
order of increasing density.
 For background research give the
definitions for mass, volume, and
density and the equation for density
 For your hypothesis pick up and look
at each of the objects and make your
best educated guess in ranking them
from lowest to highest density.
 Next, decide how you will find out if
your hypothesis is correct and write
down the steps of your experimental
procedure.
 Make a data table in the spreadsheet
for your results. The table should
have columns for object, mass,
volume, density, and rank.
 Do the experiment and fill in the