Energy. Energy Sources and Energy Conversions. Objectives. Describe an energy conversion. Give examples of energy conversions among the different forms of energy. Explain how energy conversions make energy useful. Know the non-renewable and renewable sources of energy. Energy Conversion.
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Energy Sources and Energy Conversions
Describe an energy conversion.
Give examples of energy conversions among the different forms of energy.
Explain how energy conversions make energy useful.
Know the non-renewable and renewable sources of energy.
A change from one form of energy to another.
Energy Conversion on a Trampoline
#3 – At the top of the jump, all of the kinetic energy has been converted into potential energy.
#1 – Stretching the trampoline is like stretching a rubber band. Potential energy is stored.
#4 – Just before hitting the trampoline, all of the potential energy has been converted into kinetic energy.
#2 – As the person leaves the trampoline, the potential energy is converted into kinetic energy.
Chemical → Kinetic→ Heat
Light → Chemical → ? ? ?
More Energy Conversions
electrical → light & sound
chemical → electrical
electrical → light & heat
electrical → kinetic & sound
Complete 'Energy conversions' worksheet.
What energy conversion is taking place in this video? ForTheBirds.flv
Video to demonstrate energy can not be created or destroyedCanYouCreateEnergy!!!!.flv
Energy & Machines
Energy Transfer in a Bicycle
Importance of Energy Conversions
A way of getting the form of energy that YOU need.
Converting energy to a useable form increasing energy efficiency and reduces energy waste
Non-renewable sources of energy
Renewable Sources of Energy(1) Hydro-electricity
(2) Solar energy
Most of the energy known to man is derived in some way from the sun. When we burn wood or other fuels, we are releasing the stored energy of the sun. In fact, there would be no life on earth without the sun, which provides energy needed for the growth of plants, and indirectly, the existence of all animal life.
There are two ways in which solar power can be converted to energy using solar panels. The first involves using the energy of the sun to directly heat air or a liquid. The second involves converting solar energy directly to electricity.
(2) Solar Power
Biofuels - National Geographic Magazine
(5) Wind energy
(5) Wind energy
(6) Tidal/Wave energy
Tides are caused by the gravitational pull of the moon and sun, and the rotation of the earth. Waves are caused by the wind blowing over the surface of the ocean. The energy of this moving water can be harnessed to generate electricity.
Although tidal and wave energy don't produce pollution, they can cause other environmental problems. Can you think of any?
To sum up……
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For the Birds clip: http://www.youtube.com/watch?v=1-uXEN_eRwo
Fossil fueled electricity: http://www.youtube.com/watch?v=vBbhfQ1kDfw
National Geographic - carbon emissions: attached above.
There are two articles in the national geographic magazine (you can look up the website) from October 2007 entitled 'The Carbon Crisis' and 'Growing Fuel'. I read some of the first article in class and it really got them talking.
Nuclear Power: http://www.youtube.com/watch?v=fjgdgAhOzXQ
Hydro electric: http://www.youtube.com/watch?v=htT_8sFJx1w