What is a physical change?
Physical and Chemical Properties and Changes

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Chemistry
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6th - 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. Examples include rusting, burning, and digestion.
3.
FLASHCARD QUESTION
Front
What is a homogeneous mixture?
Back
A homogeneous mixture is a mixture in which the composition is uniform throughout. Examples include saltwater and air.
4.
FLASHCARD QUESTION
Front
What is a heterogeneous mixture?
Back
A heterogeneous mixture is a mixture in which the composition is not uniform throughout. Examples include salad and sand.
5.
FLASHCARD QUESTION
Front
What is a chemical property?
Back
A chemical property is a characteristic of a substance that can only be observed during a chemical reaction. Examples include reactivity and flammability.
6.
FLASHCARD QUESTION
Front
What is a physical property?
Back
A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, boiling point, and density.
7.
FLASHCARD QUESTION
Front
What happens during a chemical reaction?
Back
During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.
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