Learner Express: Modules for Teaching and Learning
On the Big Island of Hawaii, volcanologist Dave Sherrod of the Hawaii Volcano Observatory, USGS, treads on the newest rock on the planet. He burns his shoes on the hottest part of the flow, but a few minutes later, the lava has cooled enough to stand on. Sherrod explains the difference between lava, which is molten rock that flows on the surface, and magma, which is molten rock under the surface. Run Time: 00:03:40
D. Structure of the Earth: Landforms are the result of a combination of constructive (sedimentation, volcanoes) and destructive forces (weathering and erosion).
Two Different Kinds of Volcanoes
Volcanoes—Sources and Types of Lava