Module 6 : Weather And Climate Changes

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Module 6: Weather and Climate Changes Students are to understand the four major greenhouse gasses in the atmosphere and perform two experiments to address the hydrologic, or water, cycle. One experiment requires 20 ml of 60 °C put into a sealed canning jar with a petri dish filled with ice on top; this experiment is used to visualize the water cycle. Then, for the second experiment, students are to construct two identical plastic bags, each filled with 200 ml of room temperature sand and 200 ml of room temperature water. One of these bags is to be exposed to sunlight for 12 hr and the other to the shade for the same amount of time; this experiment is used to visualize water infiltration and the hydrologic cycle. Greenhouse Gases There…show more content…
When the water condenses enough to form larger droplets, these droplets overcame the water’s surface tension and dropped from the canning lid or flowed down the side of the jar in the form of precipitation and runoff. This portion of the cycle continued until the experiment was concluded at the 30-minute mark. The heating of the water definitely expedited the evaporation process of the water though; this was witnessed early in the experiment. Water droplets formed quickly when the water was hot, and near the end of the experiment, when the water was cooler, there was not a noticeable change in condensation. While witnessing this, it can be concluded that the cooler water will evaporate slower and hotter water will evaporate quicker. This can easily be tested by using cold water instead of the hot water that was required by the lab. Without a soil base, plant fauna, and a large enough area infiltration, groundwater flow, transpiration, and transportation were not witnessed in this experiment. To get a full spectrum of the water cycle, a large enclosed environment filled with a portion of soil would be needed. On one side of this container would have the soil and plants with a heat source above it. While on the other side, a large pool of water is placed with a large rock in the center. Above this side is a large cooling source. The water from the pool would infiltrate
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