Weather and ClimateWeather and Climate

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Weather and ClimateWeather and Climate

Weather:The condition of the atmosphere, or the air that surrounds the Earth, at a certain place and time.

Weather @ BrainPop

Weather and ClimateWeather and Climate

Atmosphere: The air that surrounds the Earth.

Atmosphere @ BrainPop

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Troposphere:The layer closest to the Earth.

The LayersThe Layersof the of the

AtmosphereAtmosphere

Weather and ClimateWeather and Climate

Temperature:The measure of how hot or cold something is.

Temperature @ BrainPop

Weather and ClimateWeather and Climate

Humidity:A measure of how much moisture is in the air.

Water Vapor:Water in the form of a gas.

Humidity @ BrainPop

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Q: How does the air feel on a hot humid day? Why?

A: On a hot, humid day, the air feels damp and sticky because it contains so much moisture.

Bonus Definitions:Bonus Definitions:

Absolute Humidity:How much water is actually in the air.

Relative Humidity:The relative humidity tells how much water the air

is holding compared to how much it could hold at a certain temperature.

Weather and ClimateWeather and Climate

Air Pressure:The weight of the air around Earth pressing down

on Earth's surface.

How Does Air Pressure Cause Ear Popping?“The main cause of air pressure-related ear popping is an

imbalance between the pressure within the ear and the pressure outside of the ear. Anytime there is a huge

disparity between the two air pressures, the tympanic membrane, or eardrum, expands or contracts in an effort to help equalize the pressures. This contraction or expansion

causes a popping or crackling sound in the ears.”From ehow.com

Weather and ClimateWeather and Climate

Q: Does cold or warm air have more air pressure? Why?

A: Cold air tends to have higher air pressure than warm air because it weighs more.

Have you ever heard that Warm Air rises?

Weather and ClimateWeather and Climate

Local Wind:Affects weather in only a small region.

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Sea Breeze:Warmer air over the land is pushed up by cooler

air moving in from over the water.

Land Breeze:Warmer air over the water is pushed up by cooler

air moving out from over the land.

Wind @ BrainPop

Weather and ClimateWeather and Climate

Prevailing Winds:A pattern of moving air over large parts of Earth.

Bonus:Prevailing Winds (global winds) are caused by

the uneven heating of large areas of Earth's surface caused by Earth's rotation, or spin.

Prevailing Winds blow from the same general direction.

In the United States winds called the Prevailing Westerlies blow from west to east.

Weather and ClimateWeather and Climate

A: Sea breezeB: Land breeze