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!