Weather and ClimateWeather and Climate

Part 1Day 1

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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

Weather and ClimateWeather and Climate

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

Weather and ClimateWeather and Climate

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 ClimateAir 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.

Weather and ClimateWeather and Climate

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