Transcript Ch. 1 Weather - Wayne County Schools

Weather
The amount that air presses
on the earth is called…
Air pressure
Rain, snow, and
hail are kinds of…
Precipitation
The amount of water vapor in
the air is called…
Humidity
An area where cool air is
sinking is a …..
High pressure area
A tool that shows wind
direction is called a ….
Wind vane
A large amount of air that has a
certain temperature and humidity is
called an…
Air mass
To measure exact wind speed,
scientists use this special tool:
anemometer
Cool Fact:
The National Weather Service
has weather stations all over
the United States.
An area where warm air is
rising is a…
low pressure area
A tool that
measures
precipitation is a …
Rain gauge
A person that studies weather is
called a….
meteorologist
The humidity in the
air can be measured
using a …
hygrometer
A tool that measures
air pressure is called
a ….
barometer
Two air masses
meet at a line
called a …
front
A prediction of what the
weather will be like is a ….
Forecast
True or False?
Water vapor evaporates as tiny
water droplets to form a cloud.
False
True or False?
Cumulus clouds are rainy
weather clouds.
False
True or False?
A hygrometer measures rainfall.
False
How is the air above the
earth warmed?
Sunlight hits earth and warms it. The
heat rises warming the air above.
Why is air pressure lower as
you go high above the earth?
There is LESS air!
How do weather forecasts help
keep people safe?
They issue watches and warnings
for bad weather.
What is an air mass?
A large body of air with the same
temperature and humidity.
How do air masses usually move
across the United States?
From West to East
What is a front?
The line where cold and warm air meet.
How do clouds
form?
When water vapor
condenses and
water droplets
form a cloud.
What is humidity?
The amount of moisture
in the air
Why is the earth’s surface
heated unevenly?
The sunlight hits the earth
at different angles.
What is one reason that it is usually
warmer during summer days than
during winter days?
There are more hours of sunlight!
You all have done a
great job learning
about weather!