Physical and Chemical Changes

Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a physical change?
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 one or more new substances with different properties. Examples include rusting, burning, and cooking.
3.
FLASHCARD QUESTION
Front
What is a sign that a chemical reaction has occurred?
Back
Signs of a chemical reaction include the formation of a gas, a change in color, the formation of a precipitate, and a change in temperature.
4.
FLASHCARD QUESTION
Front
Is melting butter for popcorn a chemical or physical change?
Back
Melting butter for popcorn is a physical change.
5.
FLASHCARD QUESTION
Front
What happens during a physical change?
Back
During a physical change, the form of a substance changes, but its chemical identity remains the same.
6.
FLASHCARD QUESTION
Front
What happens during a chemical change?
Back
During a chemical change, the substances involved undergo a transformation that results in new substances being formed.
7.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
An example of a physical change is the melting of ice into water.
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