What happens to water molecules when the temperature increases?
4.5 Phase Change Final Assessment

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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
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.
3.
FLASHCARD QUESTION
Front
What are the three main states of matter?
Back
Solid, liquid, and gas.
4.
FLASHCARD QUESTION
Front
How do molecules behave in a solid state?
Back
In a solid, molecules are closely packed together and vibrate in place.
5.
FLASHCARD QUESTION
Front
How do molecules behave in a liquid state?
Back
In a liquid, molecules are close together but can move past one another, allowing the liquid to flow.
6.
FLASHCARD QUESTION
Front
How do molecules behave in a gas state?
Back
In a gas, molecules are far apart and move freely, filling the space available.
7.
FLASHCARD QUESTION
Front
What is the effect of adding heat to a solid?
Back
Adding heat can cause the solid to melt and change into a liquid.
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