lindy4
lindy4
26-09-2016
Chemistry
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How do we know that air we breathe is matter?
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josiah168
josiah168
26-09-2016
Because all matter has density and since air has density then air is matter and plus EVERYTHING is made of matter
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bedwards1225
bedwards1225
20-08-2018
Nerves inside us. They send signals to our brains.
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