Water vapor is an invisible gas, but the clouds of condensed water droplets refract and disperse the sun light and so are visible.
(Water vapor; is; an invisible gas) (the clouds of condensed water droplets; refract; ) (the clouds of condensed water droplets; disperse; the sun light)
Water vapor the clouds of condensed water droplets the clouds of condensed water droplets
is refract disperse
an invisible gas
the sun light