Understanding Weather

By: Chastity Reynolds

Weather

• Weather is the condition of the atmosphere at a particular time and place.

• Water Cycle: Continuous movement of water from water sources from water sources into the air, onto and over land, into the ground, and back to water sources.

Humidity

Humidity: is the amount of water vapor moisture in the air.Relative Humidity: is the amount of moisture the air contains compared with the maximum amount it can hold at a particular temperature

Process of Condensation

Condensation: the process by which a gas, such as water vapor, becomes a liquid.Dew Point: the temperature to which air must coo to be completely saturated.

Clouds

Cloud: a collection of millions of tiny water droplets or ice crystals.•Cumulus Clouds- puffy, white clouds•Stratus Clouds-form in layers•Cirrus Cloud- thin, feathery, white clouds

Precipitation

Precipitation: water, in solid or liquid form, that falls from the air to the Earth.➢Examples: Snow, Sleet, or hail➢You measure precipitation using a rain gauge. It measures the amount of rainfall

Air Mass

Air Mass: large body of air that has similar temperature and moisture throughout.•Cold Air Masses-Brings extremely cold weather to the U.S.•Warm Air Masses-Brings hot and humid weather in the summer

Fronts

Fronts: boundary that forms between two different air massesCold Front-cold air mass meets with warm air mass. Cold air overrides the warm air. Moves fast producing thunderstorms.Warm Front-warm air mass meets with cold air mass. Warm air moves over cold air. It brings drizzly precipitation.

Severe Weather

Thunderstorms: are small, intense weather systems that produce strong heavy winds, heavy rain, lightning, and thunder.➢Thunderstorms are produced when the air near the Earth's surface must is warm and the atmosphere is unstable.

Severe Weather

Lightning: a large electrical discharge that occurs between two oppositely charged surfacesThunder: sound that results from the rapid expansion of air along the lightning strike.

Severe Weather

Tornado:small, rotating column of air that has high wind speeds and low central pressure and that touches the ground.Hurricane:large,rotating tropical weather system with wind speeds of at least 119 km/h.

Forecasting Weather

•A thermometer is a tool used to measure air temperature.•A barometer is an instrument used to measure air pressure.

Forecasting Weather

•Wind direction can be measured using a windsock or wind vane.•Wind speed is measured by a device called an anemometer

Forecasting Weather

• Isobars are lines that connect points of equal air pressure.

Summary•Weather•Water Cycle•Humidity•Relative Humidity•Condensation•Dew Point•Cloud•Precipitation•Barometer•Wind vane

●Isobars●Air Mass●Front●Thunderstorm●Lightning●Thunder●Tornado●Hurricane●Thermometer●Windsock●Anemometer

THE END