Shepherd Moons Were Discovered Because Scientists Hypothesized Their Existence Afterobserving

question 41

Multiple Choice

Shepherd moons were discovered because scientists hypothesized their existence afterobserving:

• A)the Cassini Gap.
• B)the spiral density waves in the ring system.
• C)that the gaps are not empty space, but low density regions of material.
• D)the narrow F Ring.
• E)the backlit E Ring.

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Definitions:

Earth's Crust

The Earth's crust is the outermost solid shell of the planet, composed of rock, and is the surface upon which we live. It varies in thickness and is thinner under the oceans and thicker under continental land masses.

Quartz

A hard, crystalline mineral composed of silicon and oxygen atoms, widely used in jewelry and as an industrial abrasive.

Feldspar

A group of rock-forming minerals that are among the most abundant minerals in the Earth's crust, used in ceramics and glassmaking.

Oxide Minerals

Minerals composed of oxygen and one or more metals, common in the Earth's crust and important in various geological processes.