What is the law of conservation of mass?
Mid-term Study Aid

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•
Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Matter cannot be created or destroyed.
2.
FLASHCARD QUESTION
Front
How can a colloid be distinguished from a homogeneous mixture?
Back
By indirect evidence.
3.
FLASHCARD QUESTION
Front
What is the amount of force exerted on an object per unit of area?
Back
Pressure.
4.
FLASHCARD QUESTION
Front
A gas in a balloon has a definite ______ even when the temperature changes.
Back
Mass.
5.
FLASHCARD QUESTION
Front
Most metals are:
Back
All of the above (malleable, ductile, good conductors of heat and electricity).
6.
FLASHCARD QUESTION
Front
What is density?
Back
Density is the mass of an object divided by its volume.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form of a substance, while a chemical change alters its composition.
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