Student Page 4-2a 4. Place three thermometers on the paper, one near each end and one in the center.
5. Turn the empty aquarium upside down over the paper. Make sure the aquarium covers the bowl and all three thermometers.
6. Shine a bright light down through the glass directly over the bowl of water. Brighter bulbs lead to better results.
7. Allow the experiment to sit for five or ten minutes, then record the temperature of each thermometer on the observation sheet at the end of this student page. Answer the questions in Part I of the observation sheet.
8. Leave the light shining over the water bowl overnight. Day 2:
9. The next day, check the temperature on each of the three thermometers. Record the results on the temperature data chart on the observation sheet. Observe the water level in the bowl. Has it changed?
10. Cover the roof of the aquarium evenly with Ziplock bags of ice. Make sure that the bags are well sealed so that there are no leaks. Wait a few minutes. Add more ice bags if necessary.
11. Check the aquarium every ten minutes, recording the temperature on each thermometer. Where do you see water? Is the water moving in the aquarium? Note the water level in the bowl. How much water is in the bowl?
12. Draw a diagram of the aquarium and use colored pencils to map the condensation patterns (for example, green for heaviest, yellow for lightest).