The exercise from Physical Science class.

1. Physical Science Mrs. Harris ~ Sept.10, 2010

2. In the news: Oil Spills

3. Let’s look at some numbers: An estimated 190,120,055 gallons of oil have leaked into the Gulf of Mexico. Oil is sold in barrels. There are 42 gallons of oil per barrel. How many barrels of oil have leaked into the Gulf of Mexico? ________about 4.5 million barrels_______________ 42 gallons of oil 1 barrel 190,120,055 gallons of oil 190,120,055 gal of oil ? barrels 4,526,667 barrels By dividing the gallons in the Gulf by the number of gallons per barrel.

4. What do we get from oil?

5. Let’s talk about gasoline: For every barrel of oil (42 gallons), we can get 19.5 gallons of gasoline. From our calculation of __________ barrels of oil in the Gulf of Mexico, how many gallons of gas could have been produced? ___________________________________ 230,769 gallons of gas ? Gallons of gas 4,500,000 barrels 19.5 gallons of gas 1 barrel 230,769 gal of gas 4,500,000 barrels 4.5 million barrels divided by 19.5 gallons of gas.

6. Let’s talk about gasoline: If 19.5 gallons of gas can be made from 1 barrel (42 gal), what % of each barrel can be made into gas? ___________________________________ 46% 19.5 gallons of gas 42 gallons (per barrel) = 0.46 = 46%

7. Next week: Unit 2 Characteristics of pure substances and mixtures Bring a picture of yourself to share with your group. Mrs. Harris’s nickname in college.