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Water and Weather
By Kandi Barnard
Water and Weather
How does the movement affect weather?
Water
Cycle
Air
Masses
How can air masses be described?
What affect do fronts have on our weather?
Fronts
Tools
Symbols
How can we measure and record weather factors?
How can we display weather data?
•The Water Cycle
Where does the water go?
evaporation
•
occurs when
water is heated
by the sun, and
becomes water
vapor, rising
into the air.
condensation
•
•
occurs as water
vapor cools.
water droplets
combine with dust
and dirt in the
atmosphere to
create clouds.
precipitation
•
•
occurs when
clouds become
saturated with
moisture.
the type of
precipitation
depends on
temperature.
•Air Masses
A huge body of air with the same temperature and humidity, which can form over land and water.
An air mass is
described according to
the temperature and
amount of moisture.
If an air mass forms…
Over land where
temperatures are high,
it is
Over land where
temperatures are low,
It is
Over water where
temperatures are high,
it is
Over water where
temperatures are low,
it is
•Fronts
•
are created when two air masses meet
Cold fronts occur when a
cool air mass collides with a
warm air mass, pushing the
warm air up. They bring brief,
strong precipitation and lower
temperatures.
•
Warm fronts occur when a
warm air mass moves over a
slow moving cold air mass.
They bring steady, precipitation
and higher temperatures.
•
Tools for measuring weather
•
Barometer – air pressure
•
•
Rain gauge – amount of
precipitation
Wind vane – direction wind is
blowing from
•
Anemometer – wind speed
Weather Symbols
•
High pressure system
•
•
•
Warm front
Low pressure system
Cold front
•
Stationary
front
Weather Maps
Meteorologists
use these
symbols to help
you know what
changes to
expect in the
weather.