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Physical and Chemical Changes
Table of Contents Add Physical/Chemical Changes
Turn to the next clean page and title it Physical/Chemical Changes
Matter Review Matter is everywhere. Matter is anything that takes up
space and has mass. Matter is constantly experiencing
both chemical and physical changes.
Physical Change Physical changes occur when
matter changes its property but not its chemical nature.
Physical property changes could include a change in: texture, shape, size, color, volume, mass, weight, and state (melting, boiling, freezing).
Physical Property Changes Texture
Ex: A piece of wood that has been sanded with sandpaper.
It is still wood, only the texture has been changed.
Physical Property Changes Shape
Ex. A piece of paper that has been crumpled up into a ball.
It is still paper, but a different shape.
Physical Property Changes Size
Ex. A piece of cloth that has been cut. It is still cloth, it is just a different size
Physical Property Change Color
Ex. Painting your fingernails. They are still fingernails, they are just a
different color.
Physical Property Change Change in State
EX: Freezing Water It is still water, just in a solid state
Physical Property Change Change in State
Ex. Melting wax It is still wax, just in a different form
Physical Property Change Change in State
EX. Water Boiling It is still H2O, only in gas state
Chemical Change Chemical changes are changes matter
undergoes when it becomes new or different matter.
Most of the time, the matter cannot go back to the original substance.
To identify a chemical change look for signs such as color change, bubbling and fizzing, light production, smoke, rusting or tarnishing.
Chemical Property Change Paper Burning.
Does it produce light, and smoke? Can you return it to its original form? IT MUST BE CHEMICAL
Chemical Property Change Baking a cake
Do you have the same substance you began with?
Can you get it back into its original ingredients?
IT MUST BE CHEMICAL!
Chemical Property Change Food Digesting
Can you get back the original food you started with?
BOY I HOPE NOT! IT MUST BE CHEMICAL!
Chemical Property Change Car Rusting
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.
Video Brainpop
Is it a chemical or physical change?
Sugar dissolving in tea
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
Logs burning
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
Cutting paper
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
Crushing an aspirin
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
Metal rusting
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
Lighter fluid burning
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
An egg rotting
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
Is it a chemical or physical change?
An egg breaking
•Chemical Change
•Physical Change
OOPS!Did it change size, color, shape (Physical
Change)?or
Did it become different matter (Chemical Change)?
Correct!
NOTES
Physical Properties/Changes
change in: texture, shape, size, color, odor, volume, mass, weight, and density or change in state.
Chemical Properties/Changes
Change in: color, bubbling and fizzing, light production, smoke, temperature change, rusting, tarnishing
NOTES
Physical _________/Changes
change in: _______, shape, _______, color, volume, mass, _______, and density and change in state.
Chemical Properties/________
Change in: color, _______ and fizzing, light _________, smoke, temperature _________ , rusting and tarnishing