Embedded Files
Weather
Weather
A condition of the atmosphere that is affected by temperature, amount of moisture, wind and pressure. These conditions are always changing, which in turn, causes the weather to change.
Atmosphere
Atmosphere
The layer of air that surrounds the Earth. This air is made up of a mixture of gases and some very small amounts of solid and liquid particles.
Air
Air
Air takes up space
Air
Air
Air is a colorless, odorless, and tasteless mixture of gases
Air
Air
nitrogen - 78%
oxygen - 21%
small amounts of others
Air Pressure
Air Pressure
The weight of the air pressing down on the Earth
A barometer is an instrument that measures air pressure.
Air Mass
Air Mass
An air mass is a large mass of air that has similar characteristics of temperature and humidity within it.
Wind Chill
Wind Chill
Wind chill is the apparent temperature felt on exposed skin, which is a combination of the air temperature and wind speed.
Anemometer
Anemometer
An anemometer is a device used for measuring wind speed
Wind Vane
Wind Vane
A weather vane, or wind vane, is an instrument for showing the direction of the wind.
Isotherm
Isotherm
A line on a map connecting points having the same temperature at a given time or on average over a given period.
Isobars
Isobars
Lines on a map connecting areas that have the same air pressure
Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail.
rain
rain
Rain is by far the most common type of precipitation in our atmosphere. Rain takes place when drops of liquid water fall all the way to the surface of the Earth.
freezing rain
freezing rain
Freezing rain, which is sometimes referred to as glaze, takes place when water droplets become super-chilled. They do not freeze in air, but rather freeze the instant they strike an object, such as a road or car. The result can make roads very slippery, and can cause car doors to become frozen shut.
sleet
sleet
Sleet refers to a mixture of snow and rain as well as raindrops that freeze on their way down. Unlike snow, the raindrops pass through a liquid form before freezing. The result is that they are not light and fluffy.
snow
snow
Snow forms when water vapor turns directly into ice without ever passing through a liquid state. This happens as water condenses around an ice crystal.
hail
hail
Hail forms in a complex dance between moisture and wind. Deep within cumulonimbus clouds ice crystals form and begin to fall towards the Earth’s surface. As this happens, wind gusts pick up the ice crystals, pushing them back up high into the clouds. As they begin to again fall down, they continue growing in size. Again, a wind gust might catch the growing hail stones, pushing them back up high into the clouds. This process may be repeated several more times until the hail stones become so large that they are too heavy for the wind to carry, causing them to fall towards the Earth.
Fronts
Fronts
A weather front is an area where two air masses with different temperatures and densities collide, but do not mix. There are four different types of fronts.
Humidity
Humidity
the amount of water vapor in the air
Condensation
Condensation
when water vapor cools to a liquid
Dew Point
Dew Point
The temperature at which condensation occurs
hygrometer
hygrometer
A hygrometer is an instrument used to measure the amount of humidity and water vapor in the atmosphere,
thermometer
thermometer
A thermometer is a device that measures temperature or a temperature gradient.
Page updated
Report abuse