noun, [en-er-jee] 1. the capacity for vigorous activity; available power 2. "the ability to do work" In relation to Science: -the driving force for the universe -in form of kinetic or potential -never goes away, just transferred Examples of Energy: - energy is in all food, our bodies use the energy to move and be active - electricity, such as the tv, uses energy to create sound and picture on the screen - something as simple as a book sitting on a table has energy Kinetic: Energy in motion ( a moving roller coaster, energy from food in out bodies, etc.) Potential: Stored up energy (food before you eat it, still objects etc.)