Physical and Chemical Changes

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Physical and Chemical Changes

• A Write On Activity

2
Objective Chemical/Physical Change
Differentiate

• The learner will be able to distinguish between a
  physical and chemical change.

3
Examples of signs that are both Chemical
physical

• Gas production (can be a phase change or a new
  substance)
• Color change (can hold in a color like a mixture
  or it could be a new substance)
• Heat given off (simply hotter or could be burning
  to give off heat)
• Smell (can be expanding out or brand new from a
  new substance)

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Both of these examples are making a gas. Which
one is physical and which is chemical?

• H2O in a liquid going into H2O as a gas is a
  PHYSICAL Change because it still H2O

Two different chemicals are being added to create
a new gas or bubbles. Like Baking Soda Vinegar
making bubbles is a CHEMICAL change
5
Both of these pictures show a color change due to
heat which is physical and which is chemical?

• Paper burning is a chemical change because it is
  no longer paper, but becomes ash

• When metals (such as steel) heat up they glow but
  they are still the same substance (still steal)

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1. 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)?

8
Correct!Physical Change
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2. 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)?

11
Correct!ChemicalChange
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3.Is it a chemical or physical change?

• Melting an ice cube to become water.

• 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)?

14
Correct! Physical Change
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4.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)?

17
Correct! Physical Change
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5.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)?

20
Correct! Physical Change
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6. 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! ChemicalChange
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7.Is it a chemical or physical change?

• Lighter fluid 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! ChemicalChange
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8.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! ChemicalChange
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9. Is it a chemical or physical change?

• An egg breaking

• Chemical Change

• Physical Change

31
OOPS!

• Did it change size, color, shape (Physical
  Change)?
• or
• Did it become different matter (Chemical Change)?

32
Correct! Physical Change