water droplets the average cloud
contains, it weighs in at around 500
tons. Clouds are made up of tiny
droplets of water or ice crystals,
suspended in the air. On average, a
cumulus-type cloud – the white, fl uffy
type – has a volume of one cubic
kilometre (0.24 cubic miles), containing
0.5 grams (0.018 ounces) of water per
cubic metre (35 cubic feet). This adds
up to a total of 500 tons, although in
reality this can vary signifi cantly based
on the size of the cloud. Despite this
huge weight, clouds still fl oat because
the dryer air below them is denser.
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