1
The ocean is the key element in Earth's hydrologic cycle (water cycle). Students will construct a simple model of the hydrologic cycle to help them visualize and understand the movement of liquid water and heat. The hydrologic cycle is the continual movement of water from one place to another and...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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2
Scientists, engineers, and others create geologic maps to determine the best places for people to settle, build, farm, and use land in a variety of ways. They also use geologic maps to monitor the ways that human activity might be changing the land itself over time. As the Geologic Map of Karst in...
Grade Level   6 7 8 9 10 11 12
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3
"Water that accumulates beneath the surface of the Earth is called groundwater. Contrary to popular belief, groundwater does not form underground """"rivers,"""" but is actually found in the small spaces and cracks between rocks and other material such as sand and gravel. Groundwater supplies about...
Grade Level   4 5 6 7 8 9
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4
"There are many glaciers all over Alaska. Flying into Lake Clark National Park and Preserve through Lake Clark Pass, you will see many glaciers. These glaciers were growing during the last Ice Age. Now many are retreating because Alaska is getting warmer. As the glaciers melt they leave behind...
Grade Level   5 6 7 8 9 10 11 12
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5
Sinkholes are natural depressions in the land caused when limestone and soils dissolve. They form when groundwater removes rock underground. They can form by slow gradual sinking or by sudden collapse of an underlying hole. Sinkholes are common in about one quarter of the U.S. You can usually...
Grade Level   6 7 8 9 10
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6
We usually think of caves forming as rocks are dissolved and the particles are washed away, leaving hollow spaces behind. This activity simulates the way that dissolution, a chemical weathering process, leads to the formation of caves. When precipitation such as rainwater or snowmelt mixes with...
Grade Level   7 8 9 10 11 12
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7
If you leave water on while brushing your teeth, you might be a water waster! Students collect water while brushing their teeth. Multiplying the amount of water collected by the number of people in their household gives an estimate of how much water is being wasted. This concept can even be applied...
Grade Level   K 1 2 3 4
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