Transcript Classifications of Matter

Classifications of Matter
ALCOS 4 & 6
Matter has mass and volume
All objects are made of matter
Matter is anything that has mass and takes
up space.
 Matter is made of particles called atoms.
 Atoms are too small to be seen.
 Examples of matter: our body, air, water
 Can you think of nonexamples?
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Mass is a measure of the amount of
matter an object has.

For example, a metal teaspoon has more
mass than a plastic spoon even though
they are the same size.
Measuring Mass
The standard unit for measuring mass is
the gram.
 A pan balance can be used to compare
the masses of two objects.
 If the two objects balance each other on
the pan balance, then they have the same
amount of mass.

Measuring Weight
Weight is the downward pull on an object
due to gravity.
 Weight is measured by using a scale.
 The standard scientific unit (SI) for weight
is the newton (N).
 A common or english unit for weight is
the pound (lb)

What is the difference between
mass and weight?

Mass is a measure of how much matter an
object contains, but weight is the
downward pull on an object due to
gravity.
Mass vs Weight
Volume
Volume is the amount of space matter
occupies.
 A bowling ball and a basketball take up
almost the same amount of space which
means they have about the same volume.
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Determining Volume by Formula
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Volume = length x width x height x or
V=lwh
Measuring Volume by Displacement
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1. Add water to a graduate cylinder. Note
the volume of the water by reading the
water level in the cylinder.
2. Submerge the irregular shaped object in
the water. Because the object and water
cannot share the same space, the water is
displaced, or moved upward. Note the new
volume of the water with the object in it.
3. Subtract the volume of the water before
you added the object from the volume of
the water and the object together. The
result is the volume of the object.
Density
The relationship between the mass and
the volume of a substance is another
important physical property.
 Density is a measure of the amount of
matter present in a given volume of a
substance.
 Density= mass/volume or D=m/v
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Calculating Density
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A glass marble has a volume of 5cm³ and
a mass of 13g. What is the density of the
glass marble?