Transcript water vapor - Simpson County Schools

WEATHER
AND
CLIMATE
Where Weather Occurs
 Atmosphere (lowest layer of air that
surrounds Earth)
 Troposphere: where most weather occurs
(lowest layer)
 Stratosphere: few clouds form there
Weather Instruments
 Thermometer: measures air
temperature
 Barometer: measures air pressure
 Rain Gauge: measures the amount of
precipitation
 Wind Vane: shows direction of wind
Air Pressure (weight of air)
 Low pressure = warm air (warm)
 Humidity
 High pressure = cool air (cold)
Water in the Air
 Humidity- amount of water in the air
 How does it get there????
Oceans are the BIGGEST source of water
- As sun heats the oceans, the water turns into water
vapor, which rises into the air
Evaporation: process of liquid changing into vapor
Condensation: water vapor turning back into liquid
drops of water (forming clouds)
Types of Clouds
 Cumulonimbus: tall and bring thunderstorms and
sometimes hail
 Cirrus: high clouds mostly made of ice crystals (Fair
weather)
 Cumulus: form when large bubbles of warm air rise
rapidly (piled and puffy- fair weather but can produce
light rain)
 Stratus: form layers (fog) and produce rain or snow
Questions
1.) How do weather scientists observe and
measure weather conditions?
2.) How is water recycled in the water cycle?
3.) What causes clouds to form?
4.) It is a grey, cloudy day and light rain is falling.
What type of cloud would you expect to see?
Explain.