Energy makes changes
Energy makes changes
"What helps athletes run fast, leap high, and throw a hammer far? It is the changing power of energy. Let's go to a stadium and find out more about how athletes use energy and forces to win."--Back cover
"What helps athletes run fast, leap high, and throw a hammer far? It is the changing power of energy. Let's go to a stadium and find out more about how athletes use energy and forces to win."--Back cover