Sept+15+Tues


 * Topic:** Renewable and Nonrenewable Resources in PA

Retrieve a computer and check your answers to #1-12 pg 47 of Environment and Ecology for PA.
 * Bell Ringer:**

1. A renewable resource is a material or energy source that can be replaced within a relatively short period of time, often considered to be within a human life span. 2. Food and fiber are plants and animals that are able to renew themselves via reproduction. 3. Soil is a mixture of rocks, minerals, organic matter, water, and air, and its formation is affected by climate. 4. Biomass fuels are organic matter and are commonly used in developing nations. 5. Nonrenewable resource is a material or energy source that cannot be replaced within a useful period of time; five examples are: coal, oil, natural gas, metallic and nonmetallic ores, rocks. 6. Examples of major nonmetallic ores mined in PA today are: coal, limestone, granite, slate, gravel, and clay. 7. Developed nations consume more than half of all commercial energy. Oil, gas and coal are used more commonly in developed nations; biomass fuels are used more commonly in developing nations. 8. Global use of coal is expected to increase over the next 20 years. 9. A passive solar heating system collects the sun's energy through large windows. The energy is absorbed and released when the air above the absorbing materials is cooler than the materials. Solar cells can convert solar energy directly to electricity. Solar thermal systems concentrate sunlight to produce heat, which causes water to boil and produce stream. The steam rotates a turbine that is attached to a generator that produces electricity. 10. Hydrogen is pumped into one side of the cell. Oxygen is pumped into the other side of the cell. A membrane prevents electrons from moving, thereby forcing them through a circuit that produces current. 11. Alternate energy sources include: solar, wind, geothermal, hydropower, nuclear, trash, or hydrogen. 12. The disadvantage of using sun or wind as an energy source is the fact that neither is available without interruption.


 * Check out these metric resources:**

http://www.think-metric.com/ http://js082.k12.sd.us/Notes_and_Wrkshts/Metric_Factor-Lable/metric_system_info.htm http://www.themetricsystem.info/howtolearn.htm http://www.learner.org/courses/learningmath/measurement/session3/video.html?pop=yes&pid=1991 (not yet working)

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