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Chapter 10,
Lesson 4
Water
Vapor and
Humidity
water vapor
humidity
relative humidity
transpiration
cloud formation
thermal
convection
meteorologist
water vapor - water in its gas form is
water vapor. If you can see it, it’s
not really water vapor!
humidity – the level of moisture in
the air; the amount of water
vapor in the air
relative humidity – is when you
compare how much water vapor
is in the air to how much it
COULD hold
dew point – point when the air is
completely saturated with
moisture and can hold no more.
transpiration –watery vapor
passed through a membrane or
pores in a plant
transpiration –watery vapor
passed through a membrane or
pores in a plant
cloud formation – the way clouds form
cloud formation – the way clouds
form
cloud formation – the way clouds
form
cloud formation – the way clouds
form
cloud formation – the way clouds
form
thermal – a rising air current
caused by heating the Earth’s
surface (radiation)
thermal – heated air that rises
thermals help these birds to soar,
they help gliders soar, too. They
push air into the atmosphere, that
cools and forms clouds
convection – when relatively
warm air is raised into the
atmosphere, often cooling and
forming clouds
meteorologist – a scientist who
deals with the atmosphere,
including weather and climate