Apes Unit 6 Progress Check: Frq |7 Questions| With Correct Answers.

(b)(i) Propose a different renewable resource to use that would be a realistic solution to generating electricity without using fossil fuels or hydroelectric power in a grassland ecosystem. {Ans: -Solar energy/PV cells -Biomass burning/ethanol production -Wind energy/wind turbines}(a)(ii) Describe one potential disadvantage of hydroelectric power plants. {Ans: -Hydroelectric dams can disrupt fish migration/fish migration routes. -Hydroelectric dams can trap sediments, which can lead to coastal erosion. -Hydroelectric dams can change the flow regime of a river/can disrupt original river habitat/can lead to changes in flora and fauna in the river ecosystem. -Terrestrial habitats/agricultural areas/human populations can be displaced by the construction of the reservoir.}(e) The world's largest hydroelectric power plant is the 22.5 gigawatt (GW) Three Gorges Dam in China. It produces about 90TWh of electricity each year. If a hydroelectric plant with the same capacity as the Three Gorges Dam was built in the United States, calculate how many houses such a plant would be able to provide the electricity for in a year. Show your work. {Ans: Work: 9x10 TWH/1 year x 1x10^9 kwh/1 TWH x 1 house/1.09 x 10^4 kwh/year Answer: 8,260,000 houses}(a)(i) Describe one advantage of using hydroelectric power plants over using coal-fired