Physical Change Physical change is a change that occurs that does not change the identity of the...
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Transcript of Physical Change Physical change is a change that occurs that does not change the identity of the...
![Page 1: Physical Change Physical change is a change that occurs that does not change the identity of the substance A change in which matter looks different.](https://reader036.fdocuments.in/reader036/viewer/2022062423/56649ed55503460f94be5e44/html5/thumbnails/1.jpg)
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Physical Change
Physical change is a change that occurs that does not change the identity of the substance A change in which matter looks different but is still the same matter . A change that affects the size, shape or color of a substance but does not affect its composition
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EXAMPLES OF PHYSICAL CHANGES
• Cutting paper• Mashing potatoes• Painting a wall• Breaking glass• Melting marshmallows• Molding clay• Water freezing• Water boiling• Thawing meat
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A physical change alters the form of a substance, but does not change it to another substance.
Making Orange Juice
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Chemical change is a change that occurs causing the identity of the substance to change. Examples include:
>Burning wood>Digesting food>Potassium reacting with water
A chemical change can also be called a chemical reaction.
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Wood burning to ash and smoke (a
new substance is formed)
Iron rusting
Marshmallows burning
Apple rotting
Toasting bread
Examples of Chemical Changes
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.
Example:
Baking a Cake
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Indicators of a Chemical Change
Indicators of a chemical change can include:
Light is produced
Heat is either absorbed or produced
Gas is produced
There is a change in color
Formation of a precipitate
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Differences between physical and chemical changes
With a physical change, the item can be change back to its original form
With a chemical change, the item cannot be changed back to its original form
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IS IT A CHEMICAL OR A PHYSICAL CHANGE
Type of Change Physical Chemical
Melting ice
Burning wood
Souring milk
Wadding up paper
Rusting metal
Corn Starch and Water
Corn Plastic
Adapted from: www.dpi.state.nc.us/docs/curriculum/science/units/.../8unit2pt2.ppt
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Thank you