What is a physical change?
Physical and Chemical Changes

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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.
2.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes processes like burning, rusting, and baking.
3.
FLASHCARD QUESTION
Front
What happens to a chocolate bar when it melts?
Back
Melting a chocolate bar is a physical change because it changes from solid to liquid without changing its chemical structure.
4.
FLASHCARD QUESTION
Front
What causes iron to change from shiny to rusty?
Back
The change from shiny to rusty iron is caused by a chemical reaction with oxygen and moisture in the air, resulting in rust.
5.
FLASHCARD QUESTION
Front
What is a precipitate?
Back
A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.
6.
FLASHCARD QUESTION
Front
Is dissolving Gatorade powder in water a physical or chemical change?
Back
Dissolving Gatorade powder in water is a physical change because the powder retains its chemical identity.
7.
FLASHCARD QUESTION
Front
What is an example of a chemical change in cooking?
Back
Baking cupcakes is an example of a chemical change because the ingredients undergo a chemical reaction to form new substances.
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