Using Weather Data. Earth Science Unit II. What Is AIR?. Air is a mixture of colorless, odorless gases that surrounds the Earth. 78 % Nitrogen Plants need nitrogen to grown 21% Oxygen Living things need oxygen to survive Plants give off oxygen 1% Carbon dioxide
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Air is made of nitrogen, oxygen, and other gases. Living things need air to survive.
The atmosphere is a blanket of air that surrounds Earth. The air is thinner higher in the atmosphere.
What is air?
The atmosphere acts as a natural greenhouse that keeps Earth warm.
Liquid water + Heat Energy = Water vapor (gas)
Water vapor (gas) – Heat Energy = water (Liquid)
Liquid water - Heat Energy = Ice (solid)
Freezing (0C or 32F)
Ice (solid) + Heat Energy = Water (Liquid)
Water droplets attach to dust particles
Gas to Liquid
Liquid to gas
Rain, snow, Sleet, hail
Cumulus: fluffy – fair weather
Stratus: Low level –bring steady rain
Cirrus: Thin,feathery clouds made of ice crystals – fair
Cumulonimbus fluffy and tall – bring thunderstorms
The water cycle is the movement of water into the air as water vapor and back to Earth as precipitation.
Water exists in three states: solid ice, liquid water, and water vapor.
How does the water cycle affect weather?
Different types of clouds bring pleasant weather or precipitation.
Earth’s surface heats unevenly, causing air masses to form. Fronts form where air masses collide.
Weather factors include temperature moisture, air pressure, and wind.
What causes weather?
Meteorologists gather and study weather data. They use this data to make forecasts and track severe weather.