#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! QOD : 1. Which.

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Presentation transcript:

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! QOD : 1. Which of these three types of energy do you think would be the best for our country to pursue? WHY? 2. Which sources of energy come originally from the sun? Conventional alternative energy Nuclear power Hydropower Biomass energy

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! HW #25 Review… Nuclear energy = The energy that holds atoms together. How do we all use oil in our every-day lives?

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! How do we all use oil in our every-day lives? How do nuclear power plants work?

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Leaks from nuclear power plants can release radiation, which damages DNA  cancer, birth defects, etc. 1. Small risk of large accidents Birth defects from Uranium exposure Burns from radiation

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! 2. Produces toxic waste Used fuel rods emit radiation for thousands of years.

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! How does hydropower make energy? A – Water flows from the reservoir through the dam B – The flowing water turns the turbine

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! How does hydropower make energy? C – The turbine turns the rotor (which consists of magnets) D – Electricity is produced!

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Pros 1. Dams generate clean power –Hydropower is renewable and doesn’t emit greenhouse gases or other air pollutants What kinds of energy do you think were used to build this dam?

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Pros, cont 2. Dams help people –they prevent flooding and provide cheap electricity, irrigation, and drinking water

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Cons 1.Dams change river habitat upstream: flooding downstream: not enough water

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Cons, Cont 2. Disrupt natural flooding cycles - river floodplains don’t receive nutrients from sediments (which are trapped behind dams)

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Cons, Cont 3. Temperature of the water is changed  aquatic populations go extinct

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Cons, Cont 4. Dams prevent anadromous fish from laying their eggs.  Fish ladder   No fish ladder!

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Biomass = plant or animal matter People harness energy by burning biomass. How many people do you think use biomass as their main source of energy?

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Biomass quickfacts first energy source used by humans. Over 1 billion people use wood as their main energy source. It can be burned for heat, electricity, or made into liquid fuel

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Pro’s 1. Carbon-neutral (releases as much carbon as the plants took as they grew). 2. Reduces other greenhouse gas emissions – (landfill gas, methane) 3. Economic benefits – can be produced all over the country 4. Sustainable – recycles wastes 5. Human health – no air pollution

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Con’s 1. Health hazards – indoor air pollution from fires 2. Deforestation 3. Monoculture agriculture – growing just one crop reduces biodiversity 4. Biofuels require energy 5. Inefficient

#3.17 Aim: Review conventio nal alternativ e energy Agenda QOD (5) Lesson: HW review (15) Activity: posters (15) Summary (5) HW: study! Which energy source should we use? For each of the three energy sources below… 1.Explain how the energy is harnessed 2.Is it renewable or non-renewable? 3.Draw a picture or diagram 4.List pro’s and Con’s of using that source