Heating Cooling Earth Materials

6 lamps, bulbs exposed
1 tupperware container filled with each of the following:
-white rocks
2 tupperware containers filled with each of the following:
-Fresh water
-Salt water
1 thermometer

Data recording materials

Method: Take the 7 lamps, and plug each in. after completing, group 4 of the lamps with their bulbs right next to each other, and do the same with the other 3. The 3 lamps simulate indirect sunlight, which heats up materials, but not as quickly as direct sunlight. Now put one thermometer in each of your materials. You will notice that 2 thermometers are left. These will be put next to the containers, under the lights. You will use these to get the control temperature (the temperature that the air is under the lamps). Now take your notebook, and every minute, write down the temperature of each of your materials. When you have gone 20 minutes, turn off all of the lights, and continue to measure the temperature in the dark for another 10 minutes. When you have completed this, you may, if you wish, graph the data you have collected.

What happened???
As the lights heat up the materials near them, you will see that certain ones heat up much faster than others. For example, the container with soil in it heats up very fast, while the water filled container heats up very slowly. This is what causes local winds! For more info about local winds, check out:

More info on local winds

By: Peter D

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