WEATHER AND

CLIMATE

Where Weather OccursAtmosphere (lowest layer of air that

surrounds Earth)

Troposphere: where most weather occurs (lowest layer)

Stratosphere: few clouds form there

Weather InstrumentsThermometer: measures air temperature

Barometer: measures air pressureRain 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 AirHumidity- 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 vaporCondensation: water vapor turning back into

liquiddrops of water (forming clouds)

Types of CloudsCumulonimbus: 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

Questions1.) 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.