aim: what are the pros and cons of hydropower? qod: listen to the song by woody guthrie and read the...
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Aim: What are the pros and cons of
hydropower?
QOD: Listen to the song by Woody Guthrie and read the lyrics. What is
this song about?
HydropowerPros and cons
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Aim: What are the pros and cons of
hydropower?
Aim: What are the pros and cons to generating
electricity from hydropower?
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Aim: What are the pros and cons of
hydropower? Objectives
• SWBAT list and explain the pros and cons of hydroelectric power
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Aim: What are the pros and cons of
hydropower?Pros1. Dams are relatively inexpensive to
operate.– Yet, they are very expensive to build.
2. 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?
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Aim: What are the pros and cons of
hydropower?Pros, continued
3. Dams improve quality of life– prevent flooding*, create jobs, and provide cheap
electricity, irrigation, and drinking water
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Aim: What are the pros and cons of
hydropower?Cons1. Dams alter river habitats in many waysupstream: flooding
downstream: not enough water
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Aim: What are the pros and cons of
hydropower?Cons, Continued2. Natural cycles are disrupted
- floodplains don’t receive nutrients from sediments because they get trapped behind dams
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Aim: What are the pros and cons of
hydropower?Cons, Continued3. Temperature of the water is changed
aquatic populations go extinct
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Aim: What are the pros and cons of
hydropower?
Imagine you are a fish trying to get upstream of
the Hoover dam…
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Aim: What are the pros and cons of
hydropower?Cons, Continued
4. Dams prevent anadromous fish from laying eggs.
Fish ladder
No fish ladder!
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Aim: What are the pros and cons of
hydropower?What do you think: do the pros outweigh the cons?
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Aim: What are the pros and cons of
hydropower? Modern Trends
• In the US, the era of large dam construction is probably over.– Not so in developing countries
(Brazil, China, India).
• Micro-hydropower :electricity produced in a small stream without having to build a big dam
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Aim: What are the pros and cons of
hydropower? Micro-hydropower
• Much cheaper to build.• Can be used in remote areas1
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Aim: What are the pros and cons of
hydropower? Dams and salmon 1. We will read the article about dams
and salmon together.
2. Discuss questions and answers.
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Aim: What are the pros and cons of
hydropower? What are the pros and cons of
hydropower?
Should we use it?