What is a chemical change?
Chemical Reactions Test Review

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•
Chemistry
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A chemical change is a process that results in the formation of one or more new substances with different properties from the original substances.
2.
FLASHCARD QUESTION
Front
What is the general representation of a decomposition reaction?
Back
AB → A + B
3.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
Melting ice is an example of a physical change.
4.
FLASHCARD QUESTION
Front
What is the chemical formula for carbon dioxide?
Back
CO₂
5.
FLASHCARD QUESTION
Front
How can you identify a balanced chemical equation?
Back
A balanced chemical equation has the same number of each type of atom on both sides of the equation.
6.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.
7.
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.
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