They float in icy oceans and can be as small as a car or as big as a small country—icebergs! With nicknames including "bergy bits" and "growlers," these floating chunks of ice can be dangerous to ships, help scientists understand climate change, and create underwater ecosystems that are home to many species of ocean animals. This fun topic supports the teaching of structure and the properties of matter by exploring solids, liquids, heating, and cooling in a fascinating, real world setting. After reading, put your knowledge to the test with a simple science project.