Energy and Energy Transformations

I know...

• how to identify the type of energy when presented with an image.

Learning Target

I can...

• ​identify different types of energy

• construct explanations for energy transformations within a system.

​​Success Criteria

Whenever work is done, energy is transformed or transferred to another system.

• Energy is the ability to do work.​

Energy and Work

Energy and Work

Misconception:

• Only things that are moving have energy.

  • Energy can be present in an object or a system when no​thing is happening.

  • Once an object moves in the direction of the force being applied, we can observe work being done as energy is transferred ​from one object to another.

Types of Energy

​Each of these forms of energy can be converted into other forms of energy.

definition: the energy associated with the motion or position of an object.

• this is the sum (total amount) of potential and kinetic energy in a system.

  • Kinetic energy: the energy of motion

  • Potential Energy: the energy that is stored in an object (energy of position)

Mechanical Energy

definition: energy that results from the flow of electrons

• electric charges can exert forces that do work​

Electrical Energy

definition: the energy stored in chemical bonds

• when bonds are broken the released energy can do work​

Chemical Energy

definition: energy given off as heat (friction)

• Force vs Friction

  • Friction is a type of force that opposes motion, or makes it difficult for an object to move across a surface.​

​

Thermal Energy

definition: the energy stored in atomic nuclei

• Remember:

  • nuclear fission releases energy by splitting nuclei apart

  • nuclear fusion combines 2 nuclei into a larger nucleus​ which releases energy

Nuclear Energy

definition: energy that moves through a substance such as air or water

• this is caused by vibrations (periodic back-and-forth motion).

• Solids, liquids and gases can transmit sounds as waves.

​

Sound Energy

definition: energy that travels through space in the form of waves (also called radiant energy)

• visible light and x-rays are examples of electromagnetic energy​

Electromagnetic Energy

This is the process of changing energy from one form to another

Energy Conversions

​Chemical

Energy​

​Mechanical

Energy​

​Kinetic

Energy​

States that energy cannot be created nor destroyed, it can only be changed (transferred).

• energy can be transferred to another object/system or into another form

  • example:

    • a roller coaster

      • at the top of the coaster you have potential energy but when you drop it turns to kinetic energy

Law of Conservation of Energy