How are the Cascade volcanoes in Washington, Oregon, and California similar and different? Objective Students research information about Cascade volcanoes in Washington, Oregon, and California, then transfer the information onto the appropriate mobile piece before constructing the mobile "A String of Volcanoes". By the end of the lesson, students will be able to answer the question: How are the Cascade volcanoes in Washington, Oregon, and California similar and different? Background Refer to U.S. Geological Survey Fact Sheet 165-97 for general information about Cascade volcanoes and their loca Duration: 60 Minutes.