Explaning a Process--(2)

  To show that black is a better collector of solar energy than white, you can operate an experiment with some equipments.  All you have to prepare are two tin cans, black and white paint, and a room thermometer.  First of all, paint the cans--one black, one white.  After that, fill the cans with water.  Then put the cans in direct sunlight for three hours.  Finally, check the temperature of the water in the cans and compare.  You can find that the temperature of the water in the black can is higher than the white one.  This experiment proves that black collects solar energy better than white.