Curated OER
What about Continental Drift?
Fifth graders research the Continental Drift by researching for evidence of continental movement. The teaching explains the theory of plate tectonics and the Earth's magnetic field. They conclude the lesson by watching the video of "In...
Wikimedia
Wikipedia: Pacific Ring of Fire
Wikipedia offers information on the location of the Pacific Ring of Fire, an area of frequent earthquakes and volcanic eruptions. Map included.
Wikimedia
Wikipedia: Oceanic Trench
Wikipedia provides brief information on oceanic trenches, and has a hyperlinked list of major world trenches.