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Aim: What are the pros and cons of hydropower?

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Presentation on theme: "Aim: What are the pros and cons of hydropower?"— Presentation transcript:

1 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?

2 Aim: What are the pros and cons of hydropower?
Aim: What are the pros and cons to generating electricity from hydropower?

3 Aim: What are the pros and cons of hydropower?
Objectives Aim: What are the pros and cons of hydropower? SWBAT list and explain the pros and cons of hydroelectric power 3

4 Aim: What are the pros and cons of hydropower?
1. 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?

5 Aim: What are the pros and cons of hydropower?
Pros, continued Aim: What are the pros and cons of hydropower? 3. Dams improve quality of life prevent flooding*, create jobs, and provide cheap electricity, irrigation, and drinking water

6 Aim: What are the pros and cons of hydropower?
1. Dams alter river habitats in many ways upstream: flooding downstream: not enough water

7 Aim: What are the pros and cons of hydropower?
Cons, Continued Aim: What are the pros and cons of hydropower? 2. Natural cycles are disrupted - floodplains don’t receive nutrients from sediments because they get trapped behind dams

8 Aim: What are the pros and cons of hydropower?
Cons, Continued Aim: What are the pros and cons of hydropower? 3. Temperature of the water is changed  aquatic populations go extinct

9 Aim: What are the pros and cons of hydropower?
Imagine you are a fish trying to get upstream of the Hoover dam…

10 Aim: What are the pros and cons of hydropower?
Cons, Continued Aim: What are the pros and cons of hydropower? 4. Dams prevent anadromous fish from laying eggs.  No fish ladder!  Fish ladder 

11 Aim: What are the pros and cons of hydropower?
What do you think: do the pros outweigh the cons?

12 Aim: What are the pros and cons of hydropower?
Modern Trends Aim: What are the pros and cons of hydropower? 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 12

13 Aim: What are the pros and cons of hydropower?
Micro-hydropower Aim: What are the pros and cons of hydropower? Much cheaper to build. Can be used in remote areas 13

14 Aim: What are the pros and cons of hydropower?
Dams and salmon Aim: What are the pros and cons of hydropower? We will read the article about dams and salmon together. 2. Discuss questions and answers.

15 Aim: What are the pros and cons of hydropower?
Should we use it?


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