Unit 2 Changes in Matter
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a Chemical Change?
Back
A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, gas production, or precipitate formation.
2.
FLASHCARD QUESTION
Front
What is a Physical Change?
Back
A change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in state, shape, or size.
3.
FLASHCARD QUESTION
Front
What is the difference between a Chemical Reaction and a Physical Change?
Back
A chemical reaction results in the formation of new substances, while a physical change does not change the substance's chemical identity.
4.
FLASHCARD QUESTION
Front
What is the Law of Conservation of Mass?
Back
Mass is never created or destroyed in a chemical reaction; it only changes form.
5.
FLASHCARD QUESTION
Front
How do you identify a Chemical Reaction?
Back
Look for signs such as color change, gas production, temperature change, or the formation of a precipitate.
6.
FLASHCARD QUESTION
Front
What does it mean for a chemical equation to be balanced?
Back
A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.
7.
FLASHCARD QUESTION
Front
What is the formula for glucose?
Back
C6H12O6.
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