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Transcript of Energy
What is energy?
Energy is the ability to do work or produce a change
Kinetic or potential?
The 9 Types of Energy
Thermal (heat) energy
Potential or Kinetic
What is Matter?
Matter is anything that has mass and takes up space
The energy something holds (stores) because of its position, or condition,
The energy of a moving object or particles
could move or work
Two states of energy
Energy stored in fuel (ie. food) which is released when chemical reactions take place
Energy stored in an object that is being stretched, squashed, twisted, you name it!
Energy transferred by an electric current
Energy of an object contains due to its temperature (can be caused by friction)
Energy transferred through waves and light particles (photons)- light most often releases heat too
Energy transferred by sound waves
Energy stored in an atom’s nucleus
Energy of a moving object
Gravitational Potential Energy
Energy can not be created or destroyed it can only change form
Energy an object has due to its position
What does this really mean???
one type of energy can be changed into another type of energy but energy never goes away
light and heat energy
Gravitational potential energy
Thermal (heat) energy
LO: To practice identifying when and how different types of energy change form
lets try this one first ....
Wind Up Lantern
Can you name the 9 types of energy ?
LO: To learn the difference between kinetic and potential energy and to be able to explain how energy is transfered
Law of Conservation of Energy:
Whenever energy is transferred from ONE FORM to another, only part of the INPUT energy is usefully transferred as OUTPUT energy in the form that is wanted.
The remainder is transferred in some non-useful way and is therefore WASTED ENERGY.
In most cases the wasted energy is usually heat and so most energy chains end with heat.
Dynamo: transfers energy of a rotary motion into electrical energy
Energy transfer in a pengulum
A weight hung from a fixed point so that it can swing freely, especially a rod with a weight at the end that regulates the mechanism of a clock.
Learning Outcome 3: Understand types of energy and their interconversions
Carry out the investigations listed below:
• Pendulum practical
• Energy stored in a spring
• Energy stored in food
• Energy generated by a solar cell
Document each experiment with photographs or accurate diagrams as you complete them. Take these photographs and paste them into a word document or draw your diagram. Under each photograph/diagram write
out the energy transfers involved in the experiment. Also explain for each where the energy from each may be lost. Draw ,by hand if necessary, a sankey diagram to show the approximate efficiency of each transfer.