Energy Types Energy Conversions

Energy Conversions Energy conversion- a change from one form of energy to another. What are some other forms of energy?? Any form of energy can change to another Some forms of energy change into more than one other form of energy Attention Grabber- knock something off the table “not” on purpose and discuss the gravitational potential energy and the change to kinetic energy of the falling object

Two Types of Energy All energy can occur as two types: potential or kinetic energy

Two Types of Energy potential and kinetic clip Energy in motion (click on) Two Types of Energy potential and kinetic clip Potential Energy Kinetic Energy Stored energy

Mrs. Chen (7 energy conversions) PPT clip Mechanical Radiant Sound Chemical Heat Elastic Nuclear

Mechanical Energy The sum of an object’ s kinetic and gravitational potential energy

Radiant (Light) Energy Energy produced by vibrations of electrically charged particles

Sound Energy Energy caused by an object’s vibration

Chemical Energy Energy stored in chemical bonds of a substance that can be released when the substance reacts

Heat(thermal) Energy Energy related to particle motion. More motion more heat

Elastic Potential Energy Elastic potential energy-energy stored in elastic (ex: rubber band) Use a large rubber band (an exercise band works well) and shoot a soft ball into the class. Then do it again but discuss the potential and kinetic energy of the ball and band as its being extended and released.

Nuclear Energy The form of energy associated with changes in the nucleus of an atom when it splits(fission) or comes together(fusion)

Why is the sun so important? All of our energy can be traced back to our sun.

Energy Conversions in Plants Question to class: what is the process called of plants converting light energy into food/chemical energy? PHOTOSYNTHESIS Light energy is given to plants to form chemical energy which is given to us for kinetic or thermal energy! (or others..)

Energy Conversions in Plants ALL food’s energy comes from the SUN EVEN meat… animals eat plants and we eat animals

Conversions involving electrical energy Common conversions of electrical energy Alarm Clock Electrical energy  light energy and sound energy Battery Chemical energy  electrical energy Light bulb Electrical energy  light energy and thermal energy Blender Electrical energy  kinetic energy and sound energy

Chemical energy in your body is converted into kinetic energy when your muscle fibers contract and relax Your legs transfer this kinetic energy to the pedals by pushing them around in a circle The chain moves and transfers energy to the back wheel, which gets you moving! The pedals transfer this kinetic energy to the gear wheel, which transfers kinetic energy to the chain

Review In your own words…what is energy conversion? In plants, energy is transformed from A. kinetic to potential B. light to chemical C. chemical to electrical D. chemical to light Describe a case in which electrical energy is converted into thermal energy. How does your body get the energy that it needs?

Summarizer How does energy change from one form to another?