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Matter Properties and Changes
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What is volume?
the amount of space something takes up
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What is the difference between a physical and a chemical change?
chemical - substances form new substances --- physical change - identity of the substance stays the same
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What is density?
the amount of mass or particles in a particular volume (the measure of the amount of stuff in a space)
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What is the law of the conservation of mass?
mass/matter cannot be created or destroyed
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What other unit besides pounds and ounces can weight be measured in?
Newtons
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What is matter made up of?
tiny particles called atoms
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What is matter?
anything that has mass and takes up space
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What are the three phases of matter?
solid, liquid, gas
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What is weight?
the pull of gravity between masses
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What is an example of the conservation of mass?
log -->fire --> ash and gas (CO2)
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Which one is denser? water or air?
Water
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What do some chemical changes need to begin?
energy
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What is mass?
the amount of matter in a substance
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