Physical and Chemical Changes
Flashcard
•
Chemistry
•
6th - 8th Grade
•
Practice Problem
•
Hard
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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.
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, involving a rearrangement of atoms.
3.
FLASHCARD QUESTION
Front
What are some signs that a chemical reaction has occurred?
Back
Signs of a chemical reaction include the formation of a gas, color change, temperature change, and the formation of a precipitate.
4.
FLASHCARD QUESTION
Front
What happens during the process of digestion in the mouth?
Back
Digestion in the mouth involves a physical change where teeth chew food, breaking it down into smaller pieces.
5.
FLASHCARD QUESTION
Front
What is evaporation?
Back
Evaporation is the process by which liquid turns into vapor, often due to heat, and is a physical change.
6.
FLASHCARD QUESTION
Front
Is melting butter a chemical or physical change?
Back
Melting butter is a physical change because it changes from solid to liquid without altering its chemical structure.
7.
FLASHCARD QUESTION
Front
What occurs when sugar dissolves in tea?
Back
When sugar dissolves in tea, it undergoes a physical change, as the sugar molecules disperse in the liquid but do not change chemically.
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