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Searched for: Audience is Middle School Teachers
Results 331 - 335 of 1,620
The development of our solar system can be viewed as a continuous and complicated process that started about 4.6 billion years ago. As scientists continue to study the solar system, and Earth in particular, their...
Dams are widely distributed throughout the U.S. Their impact is perhaps most apparent in western cities, many of which lack a sufficient local water supply and thus rely on water diverted from far-away sources,...
A recent report stated that in the next decade or so, nearly half of the world's population will live in countries whose water supplies are over-stressed. In parts of Africa, northern China, southern Asia, and the...
Ground water is the primary source for both municipal and industrial water supplies throughout the world. Some of the world's largest and fastest-growing cities depend heavily on natural aquifers that collect and store...
Volcanoes provide spectacular evidence that we are living on a dynamic planet, where land can be created or destroyed without regard to human structures or civilizations. This interactive resource adapted from the...
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