A pot of water boils over a hot burner on the stove. Sunshine warms your skin on a breezy day. Heat is warming things all around you. But what exactly is heat? And how do things become warmer or colder? Listen to this audiobook to find out! Learn all about matter, energy, and forces in the Exploring Physical Science series - part of the Lightning Bolt Books™ collection. Lightning Bolt Books™ bring nonfiction topics to life!