What is a physical change?
Physical and Chemical Changes

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Science
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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 digestion.
3.
FLASHCARD QUESTION
Front
What happens to iron when it rusts?
Back
When iron rusts, it undergoes a chemical reaction with oxygen and moisture in the air, forming iron oxide, commonly known as rust.
4.
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.
5.
FLASHCARD QUESTION
Front
Is dissolving sugar in water a physical or chemical change?
Back
Dissolving sugar in water is a physical change because the sugar can be recovered by evaporating the water.
6.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
Cutting a piece of paper is an example of a physical change because it does not change the chemical composition of the paper.
7.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Burning wood is an example of a chemical change because it transforms the wood into ash, smoke, and gases.
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