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How to Clean Up Oil Spills. Agenda : February 21 st , 2013 Warm-up : Describe how invasive species can be harmful to a native ecosystem. Give an example Cornell Notes (pg. 27) How to Clean Up Oil Spills Introduce Oil Spill Lab Work on pre-lab questions - PowerPoint PPT Presentation
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Agenda: February 21st, 2013 Warm-up: Describe how invasive species
can be harmful to a native ecosystem. Give an example
Cornell Notes (pg. 27)◦How to Clean Up Oil Spills
Introduce Oil Spill Lab◦Work on pre-lab questions
Homework: Finish pre-lab questions (3 questions)
How to Clean Up Oil Spills
Oil tankers are the largest ships to sail in the ocean
Usually, these ships are safe
An oil rig exploded in the Gulf of Mexico
An estimated 210 million gallons of oil leaked into the Gulf over a 3 month period
Except on April 20th, 2010
Deepwater Horizon Oil SpillThe spill as seen from space on May 24th, 2010
When these spills happen, oil spreads out over the surface of the water in a large SLICK
These oil slicks can cause huge environmental damagesHowever, there are numerous ways to contain them, and clean them up
Basically a large float that surrounds the slick
As the boom is pulled into a boat, they can skim the oil off the top
The oil slick shrinks until it is completely cleaned up
Method 1: Containment boom
Vacuuming oil off the surface of the water
When detergent is sprayed on oil slicks, the oil breaks up into clumps which sink to the bottom of the ocean
Method 2: Spray detergent on the spill
These bacteria eat oil slick as food
As they reproduce, they eat more and more oil
When slick is gone, their food source is used up and the bacteria die
Method 3: Oil-eating bacteria
If a slick is small, it can sometimes be absorbed by special absorbent pads
Then, these pads can be removed from the surface of the water
Method 4: Absorbing oil