
Phase Change Final Study Guide

Flashcard
•
Science
•
7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a phase change?
Back
A phase change is a transition of matter from one state (solid, liquid, gas) to another due to the addition or removal of energy.
2.
FLASHCARD QUESTION
Front
What happens to water molecules during evaporation?
Back
During evaporation, water molecules gain energy and escape from the liquid phase into the gas phase.
3.
FLASHCARD QUESTION
Front
Why does water boil at a lower temperature on Mars than on Earth?
Back
Water boils at a lower temperature on Mars due to lower air pressure, allowing water molecules to escape more easily.
4.
FLASHCARD QUESTION
Front
What is the independent variable in an experiment?
Back
The independent variable is the factor that is changed or controlled by the experimenter to test its effects.
5.
FLASHCARD QUESTION
Front
What is the dependent variable in an experiment?
Back
The dependent variable is the factor that is measured or observed in an experiment.
6.
FLASHCARD QUESTION
Front
What happens to chocolate when heated near a campfire?
Back
Chocolate melts because heat increases the movement of its molecules.
7.
FLASHCARD QUESTION
Front
What is condensation?
Back
Condensation is the process where water vapor cools and changes back into liquid water.
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