Weather in the Atmosphere

Topic 2/Lesson 1

What is the composition and structure of Earth’s atmosphere?

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Composition - what is it made up of

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Structure - arrangement of the parts

Lesson 1 The

Atmosphere Around You

Earth’s Insulator-

atmosphere - provides protection for the Earth from harmful

solar radiation and helps keeps the planet’s temperature stable

Includes - water, air, and energy all connected within a system

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All of the parts of the system interact with each other to produce weather and climate around our planet.

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The Atmosphere protects Earth:

1. From harmful solar radiation

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2. By keeping the temperature in the range that allows �life to exist.

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Weather and Climate

Weather

Weather is what conditions of the atmosphere are over a short period of time.

Weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure, as in high and low pressure.

Climate

Climate is how the atmosphere "behaves" over relatively long periods of time.

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When scientists talk about climate, they're looking at averages of precipitation, temperature, humidity, sunshine, wind velocity, phenomena such as fog, frost, and hail storms, and other measures of the weather that occur over a long period in a particular place.

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Composition of the Atmosphere

Made up of gases mostly

nitrogen and oxygen

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Water Vapor

• Water Vapor- Water in the form of a gas
• WE CANNOT SEE WATER VAPOR

If it condenses (changes from gas to liquid) it forms the clouds we see in the sky.

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The Silly Monkey Talks

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Troposphere Stratosphere Mesosphere Thermosphere

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Heating of the Earth

Three ways heat is transferred:

Convection Conduction Radiation

Touching the heat source

The cycling movement of material hot materials rise, cool materials sink

Transferring heat energy through waves (is not seen)

Radiation, Conduction, Convection

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Sort the pictures into the correct column:

What causes Winds?

• Air is heated by solar energy (the sun) and Earth’s surface- Air is heated UNEVENLY
• Air that is warm expands and rises because it is less dense

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• Air that is cooler is more dense and pushes below the warm air

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Understanding Local Wind

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Sea Breezes

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Land Breezes

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Drag the words to the correct column.

Rises

Sinks

More dense

Less dense

High Pressure

Low Pressure

Local Winds

Wind

• Air moves as wind from areas of high pressure to areas of low pressure

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• The movement of air parallel to Earth’s surface is called WIND.

Global Winds