Chemical Reactions
Flashcard
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Hard
+2
Standards-aligned
Wayground Content
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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. Example: Freezing water.
2.
FLASHCARD QUESTION
Front
What is a catalyst?
Back
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.
Tags
NGSS.HS-PS1-5
3.
FLASHCARD QUESTION
Front
What are some signs that a chemical reaction has occurred?
Back
Signs of a chemical reaction include color change, odor change, and change in properties.
Tags
NGSS.MS-PS1-2
4.
FLASHCARD QUESTION
Front
What happens to the number of atoms in a chemical reaction?
Back
The number of atoms remains the same before and after a chemical reaction; they are rearranged but not created or destroyed.
Tags
NGSS.MS-PS1-5
5.
FLASHCARD QUESTION
Front
What is a molecule?
Back
A molecule is made of two or more atoms bonded together.
Tags
NGSS.MS-PS1-1
6.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change affects physical properties without changing the substance's identity, while a chemical change results in the formation of new substances.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS1-5
7.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Burning wood is an example of a chemical change, as it transforms the wood into ash and smoke.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
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