500
Jenna set up an experiment to see if certain substances were biodegradable. She placed a lettuce leaf, a piece of
aluminum foil, a piece of newspaper, and a piece of plastic in a bin of garden soil. She covered the substances with
soil and then observed them a week later. Which item should she expect to break down the MOST?
A. lettuce leaf
B. aluminum foil
C. newspaper
D. plastic