Transcript Review 13: Weather

Review 13:
Weather
Review 13: Weather
1. Meteorologist – scientists who study the
weather.
What direction do most weather systems
travel in the U.S.?
Review 13: Weather
2. Humidity – the amount of water vapor in the air.
 Determines whether precipitation will fall
The higher the humidity, the more likely it is there will
be precipitation.
3. Water cycle – drives the Earth’s weather
How many
types of
precipitation
can you
name?
condensation
precipitation
transpiration
runoff
ground water
water
condensation
evaporation
Review 13: Weather
3. Air pressure – the weight of all the air
molecules in an area.
4. Barometric pressure – air pressure caused
by the weight of the air.
Review 13: Weather
5. High-pressure system – when cold
air sinks to the ground, warms up, and
absorbs water vapor, causing sunny
skies.
6. Low-pressure system – when
warm air rises higher in the sky,
causing water vapor to cool and
form clouds and precipitation.
Predict what will happen if a high-humidity air mass located over an
ocean moves inland and up a mountain slope. Why do you think so?
Review 13: Weather
Cirrus – highest clouds
bring fair weather
Cumulus – bright white
wads of cotton
seen with fair weather
Review 13: Weather
Cumulonimbus – largest
clouds. Bring heavy rain, high
winds, hail and tornadoes.
Stratus – form gray sheets
that spread across the sky
Bring heavy mist and snow
or drizzle
Describe the clouds you see outside.
Do they fit any of the categories?
Review 13: Weather
7. Hail – when a raindrop freezes
and forms an icy ball before
falling to the ground.
8. Sleet – when a
raindrop falls from a
cloud and passes
through belowfreezing air making
a slushy blob.
9. Snow – when ice
crystals form in clouds
and fall to the ground
without melting.
Review 13: Weather
Make a prediction. What kind of precipitation will fall if
there are:
Below-freezing temperatures in the clouds
Temp. barely above freezing on the ground?
Describe the air temperature, precipitation, winds,
and humidity during:
Winter?
Spring?
Summer?
Fall?
Review 13: Weather
Wind speed is described in miles per hour.
Wind direction is the direction from which
the wind blows.
A north wind comes from the north.
The tail points
to where the
wind is coming
from.
The barbs on
the tail show
the speed of
the wind. More
barbs – faster
wind
The dot points
to the direction
the wind is
going.
Review 13: Weather
Tools to gather data
about the weather:
Thermometer – measures
temperature
Anemometer – measures
wind speed
Review 13: Weather
Tools to gather data about the
weather:
Rain Gauge – measures the
amount of precipitation
Barometer – measures air pressure
Weather Vane –
indicates wind direction
Review 10: Weather
Tornado – a small storm
that forms funnel clouds
of powerful winds,
sometimes topping 300
miles per hour.
Thunderstorm – a large
storm bringing violent
winds, heavy rain and
lightning.
Review 10: Weather
Blizzard – a strong
winter storm that
brings high winds,
very cold
temperatures and
heavy snow.
Hurricane – a severe
tropical storm that
brings strong,
destructive winds and
tidal surges.
Review 10: Weather
Fronts – lines that connect a very large
mass of air having the same temperature,
pressure and moisture.
Warm front – front of a warm
air mass. Brings steadier,
lighter precipitation.
Cold front – front of a cold air
mass. Brings a drop in
temperature and stormy
weather.