What happens to water molecules when the temperature increases?
Phase Change Amplify - End of Unit Study Guide

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Science
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The molecules start moving faster.
2.
FLASHCARD QUESTION
Front
How do molecules behave in a gas phase compared to a liquid phase?
Back
In a gas phase, molecules move faster and are farther apart; in a liquid phase, they move slower and are closer together.
3.
FLASHCARD QUESTION
Front
What is a phase change?
Back
A phase change is the transformation of a substance from one state of matter to another, such as solid to liquid or liquid to gas.
4.
FLASHCARD QUESTION
Front
What effect does transferring energy out of a substance have on its molecules?
Back
It slows down the molecules and can cause a phase change.
5.
FLASHCARD QUESTION
Front
What is the relationship between molecular attraction and phase changes?
Back
Stronger molecular attraction can prevent a substance from changing phase, while weaker attraction allows for phase changes.
6.
FLASHCARD QUESTION
Front
What occurs to the molecules of a substance when it freezes?
Back
The molecules move slower and become more closely packed together.
7.
FLASHCARD QUESTION
Front
What is the difference between a liquid and a solid in terms of molecular movement?
Back
In a solid, molecules vibrate in place; in a liquid, they can move around each other.
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