In a Sunspot, the Umbra Is

question 84

Multiple Choice

In a sunspot, the umbra is

• A) hotter than the penumbra.
• B) cooler than the penumbra.
• C) the same temperature as the penumbra.
• D) brighter than the penumbra.
• E) made of a different material than the rest of the surface.

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Definitions:

Tetrahedron

A four-sided pyramid, as in a silica tetrahedron.

Soluble

Capable of being dissolved in a solvent, typically referring to substances in liquids.

Mohs Hardness Scale

Consists of ten common minerals ranked in order of increasing relative hardness, from 1 to 10.

Bowen's Reaction Series

A sequence that describes the order of mineral crystallization from cooling magma according to their chemical composition and temperature.