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UConn GEOG 2300 - Energy and the Sun

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GEOG 2300 1st Edition Lecture 8Outline of Last Lecture I. Important LatitudesII. HeatIII. Electromagnetic RadiationOutline of Current Lecture I. TemperatureII. The SunIII. Solar Energy and the Earth’s EnergyIV. The Energy of LifeCurrent LectureI. Temperature A. Everything above -273 degrees C (0 degrees K) emits radiationB. The Fahrenheit scale is based on bodies; blood freezes at 0 degrees Fahrenheit; Celsius is based on waterC. The warmer the object, the shorter the wavelength, the greater amount of radiationD. All visible wavelengths are perceived as white; the overall perception of transmitted wavelengths is greenII. The SunA. The sun is an average sized star heated by nuclear reactions (hydrogen converted to helium)B. The surface temperature 6,000 degrees CC. The sun’s energy travels outward and no heat is lost, it’s spread out D. The planets further away receive less of the energyE. Solar Constant: rate of incoming energy outside the atmosphere (1370 watts per square meter)III. Solar Energy and the Earth’s EnergyA. Solar radiation is emitted at short wavelengths that are close to that of a blackbodyB. Some of this radiation is absorbed by the earth’s atmosphere before it gets tothe earth’s surface (ex: by ozone)C. Earth’s radiation is emitted at long wavelengthsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.D. A lot of this radiation is absorbed by the earth’s atmosphere before it gets to space (ex: by carbon dioxide)IV. The Energy of LifeA. Photosynthesis: 6CO2 + 12H2O + radiation energy  C6H12O6 + 6H2O + 6O2(carbon dioxide + water + radiation energy  glucose + water + oxygen)B. Cellular Respiration: C6H12O6 + 6O2 + 6H2O  6CO2 + 12H2O + energy (glucose + oxygen +water  carbon dioxide +water + energy)C. Photosynthesis and cellular respiration complement each otherD. Chemosynthesis: used when there is no sunlight (ex: hydrothermal vents deep in the ocean); organisms use the nutrients and


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UConn GEOG 2300 - Energy and the Sun

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