1 / 18

Answers to questions listed on chp 13 review

Answers to questions listed on chp 13 review. Section 13.5. What is desalination?. Any process that produces freshwater from saltwater. Describe the 2 main methods used to desalinate water.

brad
Download Presentation

Answers to questions listed on chp 13 review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Answers to questions listed on chp 13 review

  2. Section 13.5

  3. What is desalination? • Any process that produces freshwater from saltwater

  4. Describe the 2 main methods used to desalinate water • Distillation: Heat saltwater up, evaporate water, leaving salt. Move water vapor to new location, cool it down to condense back into drops of pure water • Reverse Osmosis: Use pressure to move water through a screen. Screen keeps out salt, but allows water to pass through

  5. Which process costs more? Why? • Distillation, because it requires more energy to run the process

  6. What are the main benefits to create water with desalination? • Create usable water where there is none • Net addition of usable water

  7. What are the main negatives to desalination? • Expensive • Chemicals used to process the water may contaminate the source • Where to put the salt brine created by the process

  8. Section 6

  9. 65-70% of world water is wasted due to • Leaks • Evaporation

  10. What is the main cause of water waste • Water is too cheap • More expensive to pay for repairs

  11. Suggestions to implement Price increase • Pay as you use • A certain amount is free (cheap), any use above that is much more expensive to obtain • Reward conservation/ punish waste

  12. What does government subsidize? • The government currently subsidizes the cost of water (makes it cheap) • The government should subsidize building more efficient systems

  13. Which methods of irrigation greatly reduce water used? • Center pivot • Drip irrigation

  14. What is irrigated with treated wastewater • Effluent spray irrigation • Public golf courses, parks or designated fields around some housing developments

  15. 5 practices done at home that conserve water • Shorter showers • Water efficient toilets • Fix dripping faucets/ leaky pipes • Turn water off while brushing teeth • Rain Barrels

  16. What can cities /government do? • Make water expensive • Fix leaks in water systems • Limit use of water • Limit population growth

  17. What can industry do to conserve water • Recycle/ Reuse more • Use water more efficiently

  18. Last question • All have advantages and disadvantages • Conservation of water holds the greatest potential

More Related