PBS
Pbs Learning Media: Volcanic Features
This interactive resource adapted from the National Park Service illustrates the variety of landforms and features created by volcanoes. Featured are calderas, craters, fumaroles and other geothermal features, igneous rocks, lava flows,...
PBS
Nh Pbs: Nature Works: Lakes
What is a lake? Discover the answer to this question when you explore this informative resource. This site provides information on how temperature and seasonal changes effects lakes, how lakes are formed, how lakes compare in numbers to...