What is a physical change?
Physical and Chemical Changes

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Science
•
6th 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 changes in state (like melting or freezing) and changes in shape or size.
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 can be identified by changes such as color change, gas production, or the formation of a precipitate.
3.
FLASHCARD QUESTION
Front
What is rusting?
Back
Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide (rust). This process is an example of a new substance forming.
4.
FLASHCARD QUESTION
Front
What evidence indicates a chemical change has occurred?
Back
Evidence of a chemical change includes unexpected color changes, temperature changes, gas production (bubbles), and the formation of a precipitate.
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
What happens when vinegar is mixed with baking soda?
Back
When vinegar (an acid) is mixed with baking soda (a base), a chemical reaction occurs, producing carbon dioxide gas, which creates bubbles and causes fizzing.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.
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