What is a physical change?
WCAS Prep 2025

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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Example: Melting an ice cube.
2.
FLASHCARD QUESTION
Front
What happens to the total mass during a chemical reaction in a closed container?
Back
The total mass stays the same, as mass is conserved in a closed system.
3.
FLASHCARD QUESTION
Front
What adaptation helps a cactus survive in the desert?
Back
Deep roots and water storage tissues help a cactus survive by allowing it to access water and store it for dry periods.
4.
FLASHCARD QUESTION
Front
Why does a red apple appear red?
Back
A red apple appears red because it reflects red light and absorbs other colors of light.
5.
FLASHCARD QUESTION
Front
What is an adaptation?
Back
An adaptation is a characteristic that enhances an organism's ability to survive and reproduce in its environment. Example: A butterfly changing colors to blend in with its surroundings.
6.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.
7.
FLASHCARD QUESTION
Front
What is mass conservation?
Back
Mass conservation is a principle stating that mass cannot be created or destroyed in a closed system during a chemical reaction.
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