Phase Change Assessment

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 molecules during a phase change?
Back
During a phase change, the arrangement and movement of molecules change as energy is added or removed, affecting their kinetic energy.
3.
FLASHCARD QUESTION
Front
What is kinetic energy?
Back
Kinetic energy is the energy of motion. In the context of molecules, it refers to how fast the molecules are moving.
4.
FLASHCARD QUESTION
Front
What occurs when energy is added to a solid?
Back
When energy is added to a solid, its molecules gain kinetic energy, causing them to vibrate more and eventually break free from their fixed positions, leading to a phase change to a liquid.
5.
FLASHCARD QUESTION
Front
What occurs when energy is removed from a gas?
Back
When energy is removed from a gas, its molecules lose kinetic energy, move closer together, and can change phase to a liquid.
6.
FLASHCARD QUESTION
Front
What is the relationship between temperature and molecular movement?
Back
As temperature increases, the kinetic energy of molecules increases, causing them to move faster. Conversely, as temperature decreases, molecular movement slows down.
7.
FLASHCARD QUESTION
Front
What happens to the molecules of water when it freezes?
Back
When water freezes, its molecules slow down and arrange themselves into a fixed, orderly structure, forming a solid.
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