STEP 2: When you wake up in the morning, grab a nail, board and the frozen banana.
STEP 3: Using the rock-hard banana, hammer the nail into the board.
When you placed the banana outside in below-freezing temperatures, over a period of time, the water inside the banana froze solid.
Jason Lindsey is a Science Outreach Educator with Hooked on Science. Check out his website Hooked On Science at hooked onscience.org for webcasts and experiments that might get you hooked on science. Send him your science questions at email@example.com. More science experiments can be found at www.semissourian.com.