How to make solar energy?
Finally, cut a large hole in the box and put on a plastic wrap to absorb sunlight. A simple solar water heater is finished. I do the "solar water heater" to the teacher. The teacher said: "you have not put black metal bottles, so absorb sunlight more slowly, the water temperature is not easy to rise." So, we put the bottle of black metal.
Do experiment. We put the foil affixed to the box, to reflect sunlight. Then put the metal bottle full of water in the box and secure it with a plastic foam.
Many products using solar energy.1 boxes, 1 plastic bottles and cans; paint, glue, aluminum foil, plastic cloth; out of the plastic foam, metal bottle and transparent plastic paper, ready to do a solar water heater. You can do it.
