This lesson is the second of a three-part unit on plate tectonics, which includes hands-on, inquiry-based activities. Students will use a hard-boiled egg to model Earth’s tectonic plates and interior layers. In addition, students will various edible materials to model the movement of tectonic plates at the different types of plate boundaries.
Volcanoes produce some of the Earth's most violent geologic changes, but they are not always violent. Different kinds of volcanoes, including shield, cinder cone, composite, and ashflow caldera, produce different kinds of eruptions.
The classroom resource provides a video that will describe the different varieties of volcanoes and how their eruptions cause changes to Earth's surface. This resource will provide background information to students before they create their own models. There is also a short test that can be used to assess students' understanding.
This is the second of a strand of three lessons entitled Great Rivers: Where Ecology Meets History. The lessons address the concept of large rivers as dynamic ecological systems that have had vital influences on human history. This lesson focuses on flooding, both because of its importance to human history, and because it is often misunderstood. Central to this lesson is the concept that while some floods may be predictable in a general way (i.e., in the springtime), floods do not occur on a schedule.
This is the third lesson of a three-part series entitled Great Rivers: Where Ecology Meets History. These lessons address the concept of large rivers as dynamic, ecological systems that have had vital influences on human history. This lesson consists of a variety of brief sketches that illustrate how rivers have influenced human history from the dawn of civilization.