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Erika Moz

Energy Resources: Solar power - 0 views

home.clara.net/...solar.htm

shared by Erika Moz on 10 Dec 08 - Cached
  • Erika Moz on 10 Dec 08
     
    solar energy
emily jackson

Meeting Generation We | Fast Company - 0 views

www.fastcompany.com/...062705.html

Meeting Generation WE

shared by emily jackson on 03 Dec 08 - Cached
  • emily jackson on 03 Dec 08
     
    Meeting Generation WE by Mary Meehan
Kate L

Alternative Fuel Sources - Cheaper And Eco-Friendly - 0 views

ezinearticles.com/?Alternative-Fuel-Sources---Cheaper-And-Eco-Friendly&id=1034941

energy alternative eco-friendly

shared by Kate L on 01 Dec 08 - Cached
  • The conventional and traditional fuel sources are becoming more and more expensive to extract and their indiscriminate use in the past century has resulted in their depletion.
  • natural fuel sources will reach critically low levels and precipitate a crisis much earlier than we think.
  • promising discoveries
  • ...13 more annotations...
  • mankind would have perfected and commercialized alternate sources of fuel that will be eco- friendly and affordable too.
  • Bio-diesel is one such alternate fuel source that is extracted from plants.
  • E 85, bio-diesel
  • Its contents of 15% gasoline and 85% ethanol mean that it is at least better than using pure gasoline.
  • uch alternate fuel sources like E 85 score above gasoline, they still pollute and require a vast amount of corn to be grown
  • translates into availability of lesser land for growing food for people.
  • electric cars seem to be the best alternate fuel source that we have
  • conserve our natural fuel sources.
  • efficient because all of the electricity that they need can be generated at one central location.
  • much better option than consuming petroleum derivatives and polluting more by using small and inefficient combustion motors.
  • Electricity
  • produced in any manner that suits the needs on a particular location depending on the resources it has
  • coal, hydro-electric or wind to produce this electricity that is required for electric cars.
  • Kate L on 01 Dec 08
     
    alternative fuel sources
Matthew Willcockson

HISD Resources - 0 views

www.pershinglibrary.org/...online_databases2.htm

shared by Matthew Willcockson on 04 Dec 08 - Cached
    • lora ardoin
      lora ardoin on 04 Dec 08
       
      this website is the only place that i counld use stuff on
    • lora ardoin
      lora ardoin on 04 Dec 08
       
      this website also has little info but it helps!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    • Matthew Willcockson
      Matthew Willcockson on 04 Dec 08
       
      Don't add sticky notes on webpages you do not have bookmarked for your "PLP"!!!!!!!!!!!!
zach haegner

Fast Food Fun - 0 views

www.wmburgweb.com/...index.htm

shared by zach haegner on 09 Dec 08 - Cached
  • zach haegner on 09 Dec 08
     
    facts about food
Katie M

Effects of Global Warming - Global Warming and Climate change Resource - 0 views

www.effectofglobalwarming.com

shared by Katie M on 08 Dec 08 - Cached
  • Katie M on 08 Dec 08
     
    same old information
Jesiah Zapata

Dance Help: Dance Tips, Articles and Dance Resources - 0 views

www.dancehelp.com

shared by Jesiah Zapata on 04 Dec 08 - Cached
  • Jesiah Zapata on 04 Dec 08
     
    Dance Articles and helpful tips for all styles of dance. Find information about ballet, jazz dance, hip hop, modern dance, social dance, tap dance, and dance history.
Kate L

The Energy Story - Chapter 15: Solar Energy - 0 views

www.energyquest.ca.gov/...chapter15.html

energy thermal resources

shared by Kate L on 03 Dec 08 - Cached
  • Solar energy can also be used to make electricity.
  • solar power plants, like the one in the picture to the right in California's Mojave Desert, use a highly curved mirror called a parabolic trough to focus the sunlight on a pipe running down a central point above the curve of the mirror.
  • mirror focuses the sunlight to strike the pipe
  • ...35 more annotations...
  • gets so hot that it can boil water into steam
  • team can then be used to turn a turbine to make electricity.
  • California's Mojave desert, there are huge rows of solar mirrors arranged in what's called "solar thermal power plants"
  • this idea to make electricity for more than 350,000 homes
  • problem with solar energy is that it works only when the sun is shining
  • cloudy days and at night, the power plants can't create energy.
  • solar plants, are a "hybrid" technology
  • daytime they use the sun
  • night and on cloudy days they burn natural gas to boil the water so they can continue to make electricity.
  • form of solar power plants to make electricity is called a Central Tower Power Plant, like the one to the right - the Solar Two Project.
  • Sunlight is reflected off 1,800 mirrors circling the tall tower
  • mirrors are called heliostats
  • move and turn to face the sun all day long
  • light is reflected back to the top of the tower in the center of the circle where a fluid is turned very hot by the sun's rays.
  • luid can be used to boil water
  • make steam to turn a turbine and a generator.
  • We can also change the sunlight directly to electricity using solar cells.
  • Solar cells are also called photovoltaic cells
  • PV cells for short
  • be found on many small appliances
  • calculators
  • even on spacecraft
  • first developed in the 1950s for use on U.S. space satellites
  • made of silicon, a special type of melted sand.
  • sunlight strikes the solar cell, electrons (red circles) are knocked loose
  • move toward the treated front surface (dark blue color)
  • electron imbalance is created between the front and back
  • two surfaces are joined by a connector, like a wire, a current of electricity occurs between the negative and positive sides.
  • individual solar cells are arranged together in a PV module and the modules are grouped together in an array.
  • arrays are set on special tracking devices to follow sunlight all day long.
  • electrical energy from solar cells can then be used directly
  • used in a home for lights and appliances
  • in a business
  • Solar energy can be stored in batteries to light a roadside billboard at night
  • energy can be stored in a battery for an emergency roadside cellular telephone when no telephone wires are around.
  • Kate L on 03 Dec 08
     
    Solar/ thermal energy
Kate L

Another New Alternative to Fossil Fuels: Sunflowers | Environmental Graffiti - 0 views

www.environmentalgraffiti.com/...2527

sunflower alternative resources fuel energy

shared by Kate L on 01 Dec 08 - Cached
  • Kate L on 01 Dec 08
     
    newest alternative... sunflowers
keanu Dickinson

Bagheera: Endangered Species and Endangered Animal Online Education Resource - 0 views

www.bagheera.com

shared by keanu Dickinson on 04 Dec 08 - Cached
    • keanu Dickinson
      keanu Dickinson on 04 Dec 08
       
      I hate people who kill animals to help them live on. What is i shot u and sold ur skin?
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