In a closed system, what happens to the mass during a chemical reaction?
Unit 1 Chemical Reactions Test Review

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Science
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6th - 8th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The mass stays the same.
2.
FLASHCARD QUESTION
Front
What are the defining characteristics of a solid state of matter?
Back
A solid has a definite volume and a definite shape.
3.
FLASHCARD QUESTION
Front
What type of change occurs when a new substance is created?
Back
A chemical change.
4.
FLASHCARD QUESTION
Front
Does this equation follow the Law of Conservation of Mass: Reactants = Products?
Back
TRUE.
5.
FLASHCARD QUESTION
Front
How do particles in a liquid behave?
Back
Particles of a liquid are free to move in a container but are in close contact with one another.
6.
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.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change does not create a new substance, while a chemical change does.
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