Warm-up

Page: 518, 1. What two layers of the atmosphere is temperature decreasing?

Troposphere and mesosphere

Page: 518, 2. What two layers of the atmsophere is temperature increasing?

Stratosphere and thermosphere

Page: notes, 3.The ionosphere makes it possible for worldwide _______ communication possible.

radio

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Warm-up

Page: 521, 1. The Earth’s atmosphere is heated by the _______ of energy from the ___________.

Transfer, sun

Page: 521, 2. What kind of radiation can human eyes detect?

Visible

Page: 521, 3.What is the speed in space of radiation(light)?

300,000 km/sec.

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Objective: SWBAT

–SWBAT describe the three ways that energy is transferred in the atmosphere.

–Define: greenhouse effect, radiation, conduction, convection

–Explain how humans may be contributing to the greenhouse effect

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Objective: SWBAT 3rd / 5th • Understand the temp. changes are how atmospheric layers are

identified

• Complete atmosphere layer graph and label correct area based on temperature

• Place correct location of features based on altitude and temperatures

• Compare/contrast the layers of the atmosphere

• Understand that temperature changes or varies with altitude

• Temperature range and change is how scientist label regions (layers of atmosphere)

• Understand as altitude increase air pressure decreases

• Explain why a helium balloon expands when it rises

• Why does NASA use rockets to study upper atmosphere

Activities:

• Warm-up & quiz

• Notes and discussion

• Review crossword sec. 19.1

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Energy Transfer in the Atmosphere

SEC. 19-2

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Objectives: S.W.B.A.T.

• Understand and compare and contrast – radiation, convection & conduction

• Complete heat budget chart of atmosphere

• Explain why the atmosphere acts like a blanket

Activities:

• Warm-up

• Notes and discussion

• Complete review handout on transfer of energy methods

• Heat budget & solar radiation handout

• Upper atmosphere 1-4 H.W.

Energy From the Sun

The sun is the source of all energy in our atmosphere

Three things happen to the energy received from the sun.

1. - about 30% is reflected back 2. - about 20% is absorbed by the atmosphere 3. - about 50% passes through & absorbed by land and water

Energy Transfer

There are three different ways that energy can be transferred from one substance to another

1. Radiation 2. Conduction 3. Convection

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The transfer of heat in the form of waves.

Radiation

Electromagnet radiation forms

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Radiation: Scattering of Light Clouds, dust, water droplets, and other molecules in

the atmosphere disrupt the paths of radiation from the sun and cause scattering.

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As a result, the sunlight that reaches Earth’s surface comes from all directions.

The sky appears blue, due to wavelength of blue-light is scattered more by N2 & O2

.

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Radiation: Reflection of Light

Some of the radiation that reaches Earth is reflected back.

Albedo – the amount of solar radiation that is reflected off the surface of an object.

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The Greenhouse Effect Earth’s atmosphere slows the escape of energy that

radiates from Earth’s surface just as the glass in a greenhouse does.

Greenhouse effect - the warming of the surface and lower atmosphere

of Earth that occurs when carbon dioxide,

water vapor, and other gases in the air absorb

and reradiate radiation

Things Heat Up !

The Greenhouse Effect Scientists believe that human behaviors that increase

CO2 and H2O vapor add to the greenhouse effect making Earths overall temp. to rise.

.

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Conduction

Conduction - the transfer of energy as heat through a material by direct contact.

Collisions between the particles result in the transfer of energy, which warms the substance.

Has to involve direct contact.(touch)

The transfer of heat when two objects touch.

Conduction

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http://www.youtube.com/watch?v=7Y3mfAGVn1c

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Convection

Convection - the movement of fluid(liquid, gas) matter due to differences in density that are caused by temperature variations

The continuous cycle in which cold air sinks and warm air rises and spreads energy in Earth’s atmosphere.

Convection

Warm air (less dense than cool air) exerts less pressure than the same volume of cooler air does. The less dense Warm air is pushed upward

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The transfer of heat through liquids or gasses. - Warm air rising - Cold air sinking

Convection

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Energy in the Atmosphere

Heat transfer by radiation

Heat transfer by conduction

Heat transfer

by

convection

Heat transfer

by

convection

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Cool down 1. Hot air rising and cool air sinking is a type of heat

transfer called:

Convection

2. Heat lamp (infrared energy) keeping French fries warm is what type of heat transfer?

radiation

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Cool down 1. Name two kinds of radiation from the sun?

Radio, x-rays, gamma, U.V. infrared, visible,

2. What is the name of heat transfer method when there is direct contact to energy source?

conduction

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Cool down 1. As you increase altitude the air pressure does

this? What instrument would measure this?

Decreases, barometer

2. The special area known as the ionosphere is located in what main layer of the atmosphere?

thermosphere

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