Chapter 7 Questions
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Oceanic crust is denser than the continental crust because it contains more of what three elements?
Iron, calcium and magnesium.
The Earth is composed of several __________.
Layers
What three elements make up most of Earths crust?
The Earths crust is made up of oxygen, silicon, and aluminum.
List the three layers of Earth, based on their chemical composition.
The crust, mantle, and core.
Why do less dense compounds make up Earths crust while the densest compounds make up the core?
The denser compounds are pulled toward the center of the Earth by gravity and the compounds less dense rise to the crust and mantle.
