ReadingExplorerLevel3U7-Video

A.Matching

1. Snakes -Waves move the colorful "snake"up and down, moving the water pumps inside.

2.Kites - Small underwater turbines that are attached, in triangles, to the ocean floor generate power.

3.Fans - The changing tides move the underwater blades, which act in a similar way to wind turbines.

4.Paddles - Floating paddles move up and down, pushing water through high-pressure pipes that drive an onshore turbine.

B.Matching

•_____ long, hollow tubes for carrying water, gas, steam, etc.

•_____devices that force air, water, gas, etc., in or out of something

•_____engines that have parts that turn with the help of water, wind, etc.

•_____the alternating rising and falling of the ocean that occurs each day

A.Main Idea

B.Completion

1. Richard Yemm describes the wave power opportunities as (unlimited / effective).

2. Pelamis moves (back and forth / up and down) in the water.

3. (Tides / Waves) cause Pelamis to move, which generates energy.

4.The first commercial customer for Pelamis was in (Scotland / Portugal).

5. Yemm describes Pelamis's features as (adaptable / survivable).

6. When Pelamis was being tested, a (turbine / pump) stopped working.

Discussion

Discuss these questions with a partner.

1.What are some possible disadvantages of generating power from ocean waves and tides?

2.From what you have learned in this unit, which do you think has the most potential—solar, wind, nuclear, or wave power?

本期答案