SCI 208

Lab 5 - Experiment 1: Modeling the Water Cycle

Hypothesis:

Post-Lab Questions

1. During the experiment you observe the following conditions:

5min – No change

10min – Water droplets on the side of the jar

15min – Mist forming inside the jar

20min – Thicker mist inside the jar

25min – No change since 20min

30min – No change since 25min

You then remove the lid and notice water droplets clinging to the underside of the lid. Restate your hypothesis. Was it confirmed or denied? How do you know?

2. Which water cycle processes are represented in this model and by what components?

3. Which processes are not represented? How could the model be altered to include these processes?

Lab 5 - Experiment 2: Assessing Infiltration

Hypothesis:

Post-Lab Questions

1. After one hour you observe the bag in the shade filled with wet sand on the bottom and dry sand on the top and the bag in the sun with wet sand on both the bottom and top of the bag. After 12 hours you notice no difference with the bag in the shade, however, the bag in the sun now has fully wet sand, and water droplets have formed on the side of the bag. Restate your hypothesis. Was it confirmed or denied? How do you know?

2. What formed on the inside of the bags? What parts of the water cycle are represented in this experiment?

3. What condition showed the greatest change? What force contributed to this change?

4. How would increasing the proportion of land (sand) to water affect the amount of water vapor released?