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Science 9 Unit DWeek 34.1 Electrical Energy Sources and AlternativesA nonrenewable resource isA renewable resource is Solar EnergyHow much power does the Pacific FedEx Regional Sort Facility use in one month?FedEx put solar panels on the roof of their warehouse facility to help meet some of their power demands. How much power do they get from the panels? How many homes is that able to power?How is sunlight energy converted into electricity? How much carbon dioxide (CO2) are the FedEx solar panels preventing from entering the atmosphere? What are the limitless/renewable resources pointed out in the video? In ancient times, humans used the sun to their advantage by building their homes strategically. This allowed them to stay _____________ in the winter and ______________ in the summer. In 1904, Albert Einstein first proved that light was composed of tiny packets of energy known as __________________. Wind EnergyHow much energy is produced by these windmills?How is wind energy converted into electricity?What is a problem with wind energy?How is that problem solved?What is a wind farm?In 2006, the US Dept of Energy announced that they target 20% of the nation’s energy would be supplied by wind. Today, what percentage is covered by wind energy? _________Geothermal EnergyWhat source(s) does Iceland draw their energy from?How is geothermal energy harvested?In 1 year, how many tons of greenhouse gases are released by this geothermal plant? What is ground source geothermal? Plant BiomassWhat oil accounts for 30% of the worlds energy use?How much oil is considered waste by a typical restaurant per week?How are carbon emissions by a vehicle offset by plants?How is plant biomass converted into energy?Water – Hydroelectric PowerWhat percentage of the Earth’s surface is covered by the ocean?How are tidal barrages (dams) generating power?Tidal stream technology attempts to capture the ___________________________________ of underwater currents. Think about it…As our human population is increasing to 9 billion people, our demand on resources is increasing as well. Our current power supply is unable to support a global population of 9 billion, so scientists and engineers are looking towards Mother Nature for help. Which technology do you think is most promising? Why do you think that? PracticeLabel the following as renewable or nonrenewable power sourcesHydroelectric power:Fossil fuels:Wind power:Tidal:Solar:Biomass:Geothermal:What are the downfalls of each of them?hydroelectric power:Fossil fuels:Wind power:Tidal:Solar:Biomass:Geothermal:4.2 Electricity and the EnvironmentAir Pollution Burning coal produces _______________________________________ which are factors in global warmingThink about it!What are some other factors from energy production that are harmful to the environment?Hydroelectric power:Fossil fuels:Wind power:Tidal:Solar:Biomass:Geothermal:Is it dangerous to use fossil fuels as an energy source?Is it always worth using renewable resources?Questions:Residents of a remote community decide to use wood as their primary energy source. All the trees nearby are cut down and stockpiled for use in home heating and heating the boiler of the community’s electrical generator.Is the community’s energy source guaranteed to last indefinitely? Explain.What recommendations would you make to ensure that this community has a reliable long term energy supply?What is the difference between energy conservation and energy sustainability?Does replacing soil removed by strip mining restore the environment? Explain your answerExplain how each of the following actions affect energy sustainability:Replacing a coal-fired power plant with several fields of solar arrays.Choosing a new refrigerator that is high efficiency.Carpooling with friends to drive to workReplacing the incandescent bulbs in your home with compact fluorescent bulbs. A friend brags to you about her new electric car that uses rechargeable batteries as an energy source. She says, “my new car doesn’t have an internal combustion engine, so no fossil fuels are needed to provide energy for it.” Is this an accurate statement? Explain your answer.4.3 Electrical Technology and SocietyBefore we Start, Electrical technologies have improved our standard of living. How do our lives differ from people 70 years ago?As technology advance it can result in the negative consequences of discarding old technologiesWhat kind of technological devices has your family thrown away?Some technology may be too expensive for developing countries to use- this can cause isolation and exclusionComputers changed the way our world works. Computers use binary numbers to relay messages and to operate the system.What does that mean?Why is binary useful?Practice: See page 354/355What are 3 issues with the explosion of information and electronic technology?1)2) 3)What are 3 Benefits with the explosion of information and electronic technology?1)2) 3)Unit ReviewQuestions 4-12, 14-18, 22, and 25 on page 363-364 ................
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