Chemical Reactions
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process where substances (reactants) undergo a transformation to form new substances (products).
2.
FLASHCARD QUESTION
Front
What are reactants in a chemical equation?
Back
The starting substances that undergo change during a chemical reaction, found on the left side of the equation.
3.
FLASHCARD QUESTION
Front
What are products in a chemical equation?
Back
The new substances formed as a result of a chemical reaction, found on the right side of the equation.
4.
FLASHCARD QUESTION
Front
What does the coefficient in a chemical formula indicate?
Back
The number of molecules of a substance involved in the reaction.
5.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
In a chemical reaction, mass is neither created nor destroyed; it is conserved.
6.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
Melting ice is a physical change because it does not alter the chemical composition of water.
7.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Burning wood is a chemical change because it produces new substances like ash and smoke.
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