chemical and physical changes mrs. lowe april 2011
TRANSCRIPT
![Page 1: Chemical and Physical Changes Mrs. Lowe April 2011](https://reader035.vdocuments.net/reader035/viewer/2022062717/56649e535503460f94b48d68/html5/thumbnails/1.jpg)
Chemical and Physical Changes
Mrs. Lowe April 2011
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Chemical changes
• Chemical change is a change that forms a new type of matter
• Chemical property is a feature of matter that can cause a chemical change
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Examples of a different type of matter forming during a chemical change
Burning logs ashes
New tricycle Rusted tricycle
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Changes in type of matter
Apple Rotting Apple
Shiny silver Tarnished silver
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Some clues or evidence of Chemical Changes
• Changing color (food rots, metal rusts or tarnishes)
• Having an unusual smell • Changing texture • Becoming more or less acidic• Getting hot or cold without being heated or
cooled • Bubbles forming because a gas is giving off
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Note
• During a physical change • bubbles form when water boils, but it is not a chemical
change • Modeling clay changes color if you mix two colors
together
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Physical Change
Physical change is a feature of matter that you can recognize with your senses.
Physical change is a change in matter in which they type of matter stays the same
Texture the feel of a surface.
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Some Physical Properties
shape temperature color smell hardness mass weight
length state of matter volume texture
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Some Physical ChangesCuttingBendingTearing
BreakingMelting
DissolvingMagnetizing
BoilingWarmingCoolingFreezing
EvaporatingSeparating
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Physical or Chemical Change
Mixing salt and water
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Physical Change
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Physical or Chemical
Boiling water
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Physical Change
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Chemical or Physical Change
Cooking an egg
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Chemical Change
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Chemical or Physical Change
Chewing a cracker
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Chemical Change
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Chemical or Physical Change
Mixing chocolate powder into milk
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Physical or Chemical Change
Physical change