Physical Change Physical changes occur when matter changes its
property but not its chemical nature. Physical changes could
include a change in: texture, shape, size, color, odor, volume,
mass, weight, and density.
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Physical Change Remember! properties remain the same reversible
can be used to separate mixtures
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Physical Change
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Chemical Change Chemical changes are changes matter undergoes
when it becomes new or different matter. To identify a chemical
change look for signs such as color change, bubbling and fizzing,
light production, smoke, and presence of heat.
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C. Chemical Change Remember! properties change irreversible
Signs: color change, formation of a gas/solid, release of
light/heat
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Chemical Change A chemical change occurs when fireworks are
used. Fireworks are made of metals such as magnesium and copper.
These change chemically as they light up the sky.
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Density Density describes how much mass is in a given volume of
a material.
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Density Solids, liquids and gases are matter, so they all have
density.
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Determining Density To find the density of a material, you need
to know the mass and volume of a solid sample of the material. 1.
Mass is measured with a balance or scale. 2. Use the displacement
method or calculate the volume.
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Density Problems
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What is my Density? Mass 1. 500g 2.300g 3.25g Volume 50ml 15ml
5cm3 Complete the following questions on a separate sheet of paper
as a part of your homework assignment.
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Quiz Yourself Go through the following slides to quiz your
knowledge of physical and chemical changes. Remember there is a
quiz tomorrow!
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Is it a chemical or physical change? Sugar dissolving in tea
Chemical Change Physical Change
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OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
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Correct!
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Is it a chemical or physical change? Logs burning Chemical
Change Physical Change
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OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
Slide 20
Correct!
Slide 21
Is it a chemical or physical change? Breaking water up by
separating it into hydrogen and oxygen Chemical Change Physical
Change
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OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
Slide 23
Correct!
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Is it a chemical or physical change? Cutting paper Chemical
Change Physical Change
Slide 25
OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
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Correct!
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Is it a chemical or physical change? Crushing an aspirin
Chemical Change Physical Change
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OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
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Correct!
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Is it a chemical or physical change? Metal rusting Chemical
Change Physical Change
Slide 31
OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
Slide 32
Correct!
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Is it a chemical or physical change? Lighter fluid burining
Chemical Change Physical Change
Slide 34
OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
Slide 35
Correct!
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Is it a chemical or physical change? An egg rotting Chemical
Change Physical Change
Slide 37
OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?
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Correct!
Slide 39
Is it a chemical or physical change? An egg breaking Chemical
Change Physical Change
Slide 40
OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?