1. The Cascades have a profound effect on the amount and type of plant and animal life (biosphere) that inhabit the region around Spokane and Seattle. Provide several specific examples to verify this statement.
2. The Ural mountains exhibit a north-south orientation throughout Eurasia. How does the theory of plate tectonics explain the presence of this mountain range in the interior of a continent?
3. What processes (besides melting and formation of ice sheets) could cause isostatic adjustments?