CEc_NoCredit



In 1975, an oil refinery in Philadelphia exploded, and the ensuing fire killed 8 firefighters. Which of the following best describes the event in scientific terms?
 * A: The refinery was trying to put the crude oil through a chemical change, but accidentally triggered a physical change.
 * B: The refinery was trying to put the crude oil through one chemical change, but accidentally triggered a different chemical change.
 * C: The refinery was trying to put the oil through a physical change, but accidentally triggered a chemical change.
 * D: The refinery was trying to put the oil through one physical change, but accidentally triggered a different physical change.