Explore the needs of living things, including plants and animals, as you complete this interactive tutorial.

In this cool science experiment, you will see how you can put a balloon directly into a candle flame and the balloon will not burst. The power of heat conduction makes this possible. Have fun while learning about heat transfer and energy...

This video shows how to power a boat with a candle. [3:54]

Who hasn't gotten off a plane blaming the stale cabin air for their stuffy nose, dry throat, and headache? A new study is investigated in this audio lecture that says passengers are partly to blame for bad in-flight air. New research...