Physical vs Chemical Changes
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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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. Examples include changes in shape, size, or state of matter.
2.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. It involves a rearrangement of atoms and can include processes like burning, rusting, or digestion.
3.
FLASHCARD QUESTION
Front
What evidence indicates a chemical change has occurred?
Back
Evidence of a chemical change includes the production of light, gas, a change in temperature, or the formation of a precipitate.
4.
FLASHCARD QUESTION
Front
What evidence indicates a physical change has occurred?
Back
Evidence of a physical change includes changes in shape, size, or state of matter, such as melting, freezing, or dissolving.
5.
FLASHCARD QUESTION
Front
Is getting a haircut a physical or chemical change?
Back
Getting a haircut is a physical change because it alters the appearance of hair without changing its chemical structure.
6.
FLASHCARD QUESTION
Front
What happens to the original substances in a chemical change?
Back
In a chemical change, the original substances cannot be easily reverted back to their original states without using chemical reactions.
7.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
An example of a chemical change is a copper penny turning greenish due to oxidation.
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