Design Tech Topic 2 Test Outline.docx - Isy Belsito Mrs...

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Isy Belsito Mrs. Limestoll Design Tech 6B 16 October 2018 Topic 2 Test Outline 2.1 A. R.M. and Production considers three main issues: Consumption of raw materials, consumption of energy, production of waste. B. Renewable v. Nonrenewable resources- Renw.- consumed at lesser rate at that they can be replenished by natural processes (sun, wind, water) Nonrnw.- consumed at greater rate than they can be replenished ( coal, oil, natural gas- fossil fuels). C. Renewable Resource Energy a. Solar- sun’s light contains energy in form of electromagnetic waves. When it hits silicon, energy turned to electric current and harnessed for power b. Wind energy- energy of wind turbines of the generator and the generator produces electricity. “turbines use the momentum of moving air to quietly turn large blades that are attached to the shaft of an efficient electric generator.” c. Hydroelectric- water turns turbines, geothermal- steam turns turbines, D. Nonrenewable R. E.- a. Why do we use - Coal: inexpensive, currently abundant. Natural Gas: burns more cleanly than coal. Nuclear Energy: no greenhouse or CO2 emissions. b. Why no renewable sources?- Inexpensive, feasibility depends on geographic location. c. Fracking- drill into Earth’s shale beds, extract the oil. i. Good- job opportunities, releases less CO2 emissions. ii. Bad- lots of water needed, possible contamination, worker health hazards. 2.2 Waste Mitigation Strategies A. Excess materials in landfills, so redesigning products and processes to eliminate waste as part of the Circular Economy B. Strategies- a. Reuse: using components again for same use or alternative use.
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