Auroral Displays Are Most Often

question 66

Multiple Choice

Auroral displays are most often

• A) directly above the north and south geomagnetic poles.
• B) in two bands on either side of the equator in the tropics.
• C) at the north and south geographical poles.
• D) in circular regions around the north and south geomagnetic poles.

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Definitions:

Temperature Increase

A rise in the heat energy reflected in an environment or substance, often discussed in relation to global warming.

Mafic Magma

Molten rock rich in magnesium and iron, forming dark-colored minerals and volcanic rocks.

Continental Crust

The thick, generally granitic part of the Earth's crust that forms the large land masses or continents, distinct from the denser, basaltic oceanic crust.

Cooling History

The record of the cooling and solidification of magma or lava, which informs geologists about the thermal and crystallization processes of igneous rocks.