Week #4: Wednesday to Friday only (make up for Hurricane Sandy)

List of Regents for youto practice.... http://earthscience-portal.blogspot.com
Extra Credit #1 - June 2009
                    #2 - June 2010 version DUE!

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How did you do on the Test?
HW#5 Test #7 correction

Checking what we have learned worksheet... the sun's path and location (seasons)

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Science Dictionary

albedo (āl-bē'dō)   Pronunciation Key The fraction of the total light striking a surface that gets reflected from that surface. An object that has a high albedo (near 1) is very bright; an object that has a low albedo (near 0) is dark. The Earth's albedo is about 0.37. The Moon's is about 0.12.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Example sentences

Reflectivity is described in terms of albedo , which is the percentage of light

 that's reflected.

There is significant climate engineering which can be done by adjusting the

 human controlled part of albedo.

And as far as reflectivity index or albedo  goes, you don't need an atmosphere

 to have light reflected.

They can enhance the greenhouse effect and they can also increase albedo  since

 they reflect incoming solar radiation.

Albedo  is a measure of how much light an object reflects.

The reflectivity of an asteroid is called its albedo .

The power of heat input during the day depends on local albedo  and the sine of the angle of the incident solar irradiance.

Cosmic rays could in principle trigger cloud formation and thereby alter the albedo , which is an interesting idea.

The type of clouds formed by coal pollution, and the albedo  of these clouds are another variable to the greenhouse gas equation.

High- albedo  roof coatings can reduce building air-conditioning energy use.

 

Black Body Radiation
Astronomy  Main

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  INTRODUCTION
.   A black body is a theoretical object that absorbs 100% of the radiation that hits it. Therefore it reflects no radiation and appears perfectly black. In practice no material has been found to absorb all incoming radiation, but carbon in its graphite form absorbs all but about 3%. It is also a perfect emitter of radiation. At a particular temperature the black body would emit the maximum amount of energy possible for that temperature. This value is known as the black body radiation. It would emit at every wavelength of light as it must be able to absorb every wavelength to be sure of absorbing all incoming radiation. The maximum wavelength emitted by a black body radiator is infinite. It also emits a definite amount of energy at each wavelength for a particular temperature, so standard black body radiation curves can be drawn for each temperature, showing the energy radiated at each wavelength. All objects emit radiation above absolute zero.

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GreenHouse effect: http://www.eoearth.org/article/Greenhouse_effect?topic=54099