What Is Earth's Crust Like?
ES0801  Introduction
Features or events on Earth's surface provide clues about what happens inside the planet. For instance, lava erupted from volcanoes on Earth's surface indicates that our planet has an internal temperature high enough to melt rock.
Bill Chadwick, NOAA
Eruption of Puu Oo on Hawaii, July 1984

In this investigation, you'll explore patterns formed by geologic features at Earth's surface. You'll analyze patterns showing where lava erupts, earthquakes occur, and mountains form. From these patterns, you'll infer properties of Earth's crust—the solid, outermost portion of the geosphere.


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