Develop a model based on evidence to illustrate the life span of the sun and the role of nuclear fusion in the sun's core to release energy in the form of radiation.

Karst Topography Model

Did you know that a quarter of the world’s population gets drinking water from karst aquifers? Karst is the type of landscape that forms by dissolution of carbonate rocks (limestone, dolomite) or other highly soluble rocks such as evaporates (gypsum and rock salt). Karst includes caves, sinkholes, sinking streams, and springs. Karst environments are vulnerable to groundwater contamination. Understanding groundwater flow in karst terrains is critical for safe drinking water.

Make a Watershed Model

After rain falls on relatively high land, it moves downwards into drainage areas called watersheds. You will create a model of a watershed by spraying rain on a plastic cover representing Earth’s surface. By watching how it flows, you can identify drainage divides and learn about the movement of water.

Measuring Earth’s Water

Even though our home planet has a lot of water, over 73 percent of that is salt water. We need freshwater to meet most of our needs, and precipitation supplies much of this valuable natural resource. Did you know that NASA, in a partnership with the Japanese, has a satellite that measures precipitation as it falls from the clouds to the ground?

Mining Creates Reservoirs and Habitats

There is an important interconnection between local mines and quarries that later become reservoirs and supply crucial water resources to local communities. The life cycle of a mine has different phases. Production supplies important resources such as construction materials and other important minerals. Then with the mine’s closure and reclamation, it is sometimes used for freshwater
storage and supply for the local community. Another part of a quarry’s life cycle can be to offer new habitats and support biodiversity.

Visualizing Your Watershed

Watersheds can be as small as a lake or thousands of square miles. The natural or human-made surface of the land and the sediments and rocks below are all part of a watershed. Rainfall
supplies watersheds, and water moves across the surface or infiltrates and moves through the ground.

In this activity you will use a computer model to explore the movement of water within your watershed.


• Computer with internet

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