Revealing some of the most active, to the most potentially devastating, volcanoes on Earth. Earth Science - Geology - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or use to grab...

Dr. Forrester describes the ways that severe environmental conditions, such as earthquakes, wildfires, mudslides, and droughts, challenged settlers in the United States. She talks about how the Hoover Dam was built for flood control. She...