Chapter 13 Lesson 1: Forms of Energy Ms. Amanda and Ms. Diana

What is Energy? Energy – the ability to cause change These changes can be Loud sounds Flashes of light Photosynthesis Changes in motions and positions of objects

Kinetic Energy – Energy of Motion Kinetic Energy – energy due to motion. All moving objects have kinetic energy. Kinetic Energy and Speed – The faster an object moves, the more kinetic energy it has. Kinetic Energy and Mass – An object with more mass has more kinetic energy.

Potential Energy – Stored Energy Even if an object is not moving, it still has energy. Potential Energy – stored energy due to the interactions between objects or particles. Forms of potential energy: Gravitational Elastic Chemical

Gravitational Potential Energy Gravitational Energy is stored energy between objects and Earth. When you lift an object off the ground, you increase the gravitational potential energy.

Elastic Potential Energy Elastic Potential Energy is stored in objects when they are stretched. Example: Stretching a Rubber band When you stretch the rubber band, you give it elastic potential energy. When you let the rubber band go, the elastic potential energy is transformed to kinetic energy.

Chemical Potential Energy Chemical Potential Energy – energy stored in the chemical bonds between atoms. Examples: Food Gasoline Your body uses chemical potential energy in food for all of its activities. People use chemical potential energy in gasoline to power their cars.

Energy and Work Work – the transfer of energy that occurs when a force makes an object move in the direction of the force while the force is acting on the object.

Other Forms of Energy Mechanical Energy – the sum of potential energy and kinetic energy. Sound Energy – energy that sound carries Thermal Energy – sum of kinetic energy and potential energy of the particles (heat) Electric Energy – energy from an electric current Radiant/Light Energy – energy from electromagnetic waves Nuclear Energy – energy from the nucleus of an atom

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