Alphabetical
crust
[noun]
The uppermost 5-70 km of the Earth. There are two types of crust: continental and oceanic. Continental crust ranges from 10-70 km thick and has a composition approximating that of granite. Oceanic crust, on the other hand, is approximately 5 km thick and has a composition similar to basalt, making it significantly denser than continental crust.
Appears in modules:
- Blood Biology I Components of blood
- Defining Energy Forms of energy, conversions, and measuring
- Defining Minerals Composition and crystal structure
- Earth Structure A virtual journey to the center of Earth
- History of Earth's Atmosphere I The origin of the modern atmosphere
- Identifying Minerals Characterizing minerals' physical properties
- Luis Walter Alvarez Uncovering secrets of the atom and life on earth
- Origins of Plate Tectonic Theory From early ideas to mapping the ocean floor
- Plate Boundaries Tectonic activity where plates interact
- Properties of Solids The influence of crystal structure on behavior
- The Rock Cycle Uniformitarianism and recycling
- The Silicate Minerals The silica tetrahedron and Earth's most common minerals
- Theories, Hypotheses, and Laws Definitions, examples, and their roles in science
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