The Very Rapid Recession of the Edge of the White

question 187

Multiple Choice

The very rapid recession of the edge of the white polar cap region toward the poles in springtime on Mars is caused by the:

• A) increased growth of vegetation from mid-latitudes toward the poles.
• B) evaporation of a thin layer of water ice crystals (frost or snow).
• C) melting of a thick layer of solid water ice and the subsequent run-off of water.
• D) rapid evaporation of carbon dioxide ice.

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Definitions:

Leeches

Parasitic or predatory worms belonging to the phylum Annelida and known for their use in medicine, especially for bloodletting.

Polychaetes

A class of annelid worms, characterized by having many legs or bristles, often living in marine environments.

Tapeworms

Parasitic flatworms that live in the digestive tract of vertebrates, absorbing nutrients from the host's intestine.

Annelids

A phylum of segmented worms that includes earthworms, leeches, and their relatives, characterized by a segmented body and a coelom.