density of liquid water = kg / m^3
weight per unit volume
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when is water most dense?
at +4
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colder: less dense
warmer: more dense
ice floats because it is colder, so less dense, than the water it floats on
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water has a density of 1 at +4 degrees celsius
the highest density of water is at +4
Ph below 7 = more acidic
Ph above 7 = more alkaline
7.0 = neutral Ph
pure water freezes at exactly 0.0 degrees celsius
pure water has only hydrogen and oxygen
most water has other things like minerals in it
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