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- Particles are loosely packed
- Particles move at random

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- Particles are packed closely
- Particles are able to slide along each other

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element

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Not the right definition. Must include...

# data[].attributes.body
- Particles are tightly packed
- Particles can only vibrate at one place

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Liquid to Solid

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The movement of particles from higher concentration region to lower concentration region, down the concentration gradient, at random

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Solid to liquid

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Solid, Liquid and gas

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Made of small particles called atom.

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H20 + CO2 + Sunlight + Chorophyll = O2 + Glucose

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the substance's mass per unit of volume

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Mass / Volume
Unit: kg / m3