Transcript of Matter: Physical and Chemical Changes Part 2 Physical Change Physical changes occur when matter...
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- Matter: Physical and Chemical Changes Part 2
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- 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)?
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- Correct!
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- 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)?
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- Correct!
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- Is it a chemical or physical change? Cutting paper 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? 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
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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? Lighter fluid burining
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? An egg rotting 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? An egg breaking 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!