Solar heaters are easily made by concentrating the Sun's rays to a focal point. You can do this any number of ways by using mirrors, optical lenses, aluminum foil, etc. The key is to focus and trap the Sun's energy into a small enough area, thereby producing enough heat to cook food or boil water. The morereflectors you use, the more efficient your heater will be.
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Need more information like the year, make and model of vehicle that you are working on....
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You can easily make working models displaying energy conservation using the following: solar panels; wind turbines; and hydro electricity.
There are a few ways to make an English working model. The exact model details depend on the type of English working model you want.
There are so many ways that you can make a working model on sound. One way to create a working model is to sing.
By make and model number.
First you should narrow your focus to one aspect of 'going green' Consider concepts which can be expressed with functional displays such as: Solar power Wind Generators Water Turbines For example you could build a working model of solar power by using sunlight to power a light bulb
Working model for what, exactly?
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