1. Monday, April 11 th  Welcome back!!  Grab a paper from next to the projector  Answer questions 1 and 2 on part 1

2. Oil Tanker Incident  Background information:  Oil tankers typically transport oil!  They are very large rail cars  They are steam cleaned after use  Watch the video  Answer this question on your worksheet  What do you believe caused the phenomenon you just observed? Be detailed in your explanation.

3. What do you believe caused the phenomenon you just observed? Be detailed in your explanation.

4. Lab  Answer prelab questions 1 and 2  Take a few minutes to read the procedure  When you get into the lab, you will have 15 minutes to complete it  Record your observations in the boxes  Clean up  SAFETY!!! Turn the hot-plates down to level 2  Leave the equipment as found at your lab stations  Return to the classroom and begin your analysis questions in your groups.

5. Check-in Question  A Safeway employee inflates a few balloons with helium and then takes them into the walk-in freezer.  What do you think will happen to the balloons and why? Use evidence gathered in the lab to support your claim.