Main Idea Topic: Energy Changes :
Main Idea Topic: Energy Changes In Chemical Reactions, energy is either absorbed or released.
Light and Chemical Reactions :
Light and Chemical Reactions Some reactions give off light with almost no thermal energy.
Glow Sticks, fireflies, jellies and fish of the deep all have beacons of “cold light” that help with defense, food, or communication.
Conservation of Energy :
Conservation of Energy The Law of Conservation of Energy states that energy is neither created nor destroyed in chemical reactions.
Transformation of energy into different forms – light, heat, sound, etc.
Chemical Bonds :
Chemical Bonds It takes energy to build bonds, releases energy when they are broken.
Exothermic Reactions :
Exothermic Reactions These reactions release energy.
Endothermic Reaction :
Endothermic Reaction These reactions absorb energy.