Physical vs. Chemical Change
Flashcard
•
Chemistry
•
7th - 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. 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. It involves a chemical reaction and includes processes like burning, rusting, and digestion.
3.
FLASHCARD QUESTION
Front
What are signs of a chemical reaction?
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
Is melting ice a physical or chemical change?
Back
Melting ice is a physical change because it changes from solid to liquid without altering its chemical structure.
5.
FLASHCARD QUESTION
Front
What happens to the mass of a substance during a physical change?
Back
The mass of a substance remains the same during a physical change, as no new substances are formed.
6.
FLASHCARD QUESTION
Front
What happens to the mass of a substance during a chemical change?
Back
The mass of a substance is conserved during a chemical change, but it may appear to change due to the formation of new substances.
7.
FLASHCARD QUESTION
Front
What are chemical properties?
Back
Chemical properties are characteristics that can only be observed when a substance undergoes a chemical change, such as reactivity with acids or bases.
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