Open SciEd: Chemical Reactions & Matter (Lessons 1 to 4)

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Science
•
7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is matter?
Back
Anything with mass and volume.
2.
FLASHCARD QUESTION
Front
What is a closed system?
Back
A system that does not allow transfer of matter in or out, but allows transfer of energy.
3.
FLASHCARD QUESTION
Front
What does mass measure?
Back
The amount of matter in a substance.
4.
FLASHCARD QUESTION
Front
What happens to less dense gases and liquids when surrounded by denser gases or liquids?
Back
They float upward.
5.
FLASHCARD QUESTION
Front
What is the melting point?
Back
The temperature at which a substance changes state from solid to liquid.
6.
FLASHCARD QUESTION
Front
What is an open system?
Back
A system that allows the transfer of both matter and energy.
7.
FLASHCARD QUESTION
Front
What is volume?
Back
The amount of space a substance occupies.
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