What is a physical change?
Chemical Processes and Equations Review

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Chemistry
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6th - 8th Grade
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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. Example: Coconut oil crystallizing in the freezer.
2.
FLASHCARD QUESTION
Front
What happens to the brightness of a glow stick when the temperature is lowered?
Back
Lowering the temperature makes the glow stick appear dimmer (not as bright).
3.
FLASHCARD QUESTION
Front
What happens to the brightness of a glow stick when the temperature is raised?
Back
Raising the temperature makes the glow stick appear brighter.
4.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. Example: Cooking a steak.
5.
FLASHCARD QUESTION
Front
Why does the mass of a mixture change after a chemical reaction?
Back
The mass can decrease if a gas forms and escapes, especially if the reaction occurs in an open container.
6.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.
7.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
Chopping wood is an example of a physical change.
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