Dam - PowerPoint PPT Presentation

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Dam

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  1. Dam • Placed across a river to block or control the flow of water.

  2. Reservoir • Lake where water is stored from a dam.

  3. Cofferdam • Temporary water tight walls used to keep a construction site dry during the construction of a dam.

  4. Embankment • Blocks the flow of water.

  5. Outlet • Controls the flow of water through or around a dam

  6. Spillway • Allows excess water to bypass the dam when a reservoir becomes to full.

  7. Irrigation Canals • Carry water from a place where water is plentiful to a place where it is needed.

  8. Navigation Canals • Connects two bodies of water.

  9. Erie CanalConnects New York to Great Lake Region

  10. Panama CanalConnects Atlantic Ocean and Pacific Ocean

  11. Lock • Enclosed part of a canal with a gate that allows ships to pass through.

  12. Tunnel • Underground passageways

  13. Pipelines • Used to transport oil, natural gas, water etc…

  14. Great Alaska Pipeline800 milesSends oil to US

  15. Air Supported Structure • Air pressure used to support walls.

  16. Metro Domehttp://www.youtube.com/watch?v=IxuxNLf87_Y

  17. Space Stations • Structures that allow people to live in space.

  18. Skylab • First space station of the United States.

  19. Mir • First Russian space station

  20. International Space Station • Space station operated by the United States and 15 other nations

  21. Three advantages of building dams • Store water • Provide a supply of water • Control the flow of water • Recreation

  22. Materials that dams are constructed from • Earth • Concrete • Wood

  23. Why are spillways important to dams? • Keeps water from flowing over the top of dam when there is excessive rain.

  24. What is the main reason to build canals? • To connect two bodies of water. Saves on travel time.

  25. What are reasons for building tunnels? • To move people and materials underground. • Faster • Takes up less space above ground.

  26. Three types of tunnels • Earth- Use soil to build dam. • Immersed- Pre-fabricated tunnel • Rock- Blasting and boring machines

  27. Chunnel • Tunnel that connects England and France. One of the longest tunnels in the world.

  28. How do pipelines keep pressure and keep products moving? • Above ground pumping stations

  29. How are sections of pipelines inspected for leaks • X-rays • Ultrasound

  30. Why must the earth be packed tightly around pipelines? • To keep ground from settling and causing pipe to move and burst.

  31. Four elements that make up an air supported structure. • Membrane • Means of supporting membrane • Anchoring membrane • Way in and out.

  32. What is the membrane of an air supported structure made from? • Synthetic material

  33. How do you get in and out of an air supported structure? • Air lock • Revolving Door

  34. Why are traditional doors not used in air supported structures? • Hard to open door. • Air will escape

  35. What is the main advantage of air supported structures? • Can be set up and taken down fast and easily.

  36. How do space stations produce power? • Solar

  37. How was Skylab launched into space? What year • Saturn V Rocket • 1973

  38. What was the longest stay of a astronaut on Skylab? • 84 Days

  39. What was the purpose of Skylab? • To study how the human body reacts to space

  40. What happened to Skylab? • Fell to the earth and burned up in the atmosphere

  41. What date did the Russian space station Mir take orbit? • February 20, 1986

  42. How long was Mir in Orbit? What happened to the space station? • 15 Years • Diverted into the atmosphere and burned?

  43. How are materials delivered to the International Space Station. • Space Shuttle

  44. What year did the first crew begin to live on the ISS? How many astronauts live on the ISS at one time? • 2000 • 6

  45. Explain the orbit of ISS • 220 miles above the earth. • Flies at 17, 500 mph • Circles the earth every 90 minutes