The Moon, Mercury, and Mars Do Not Have Plate Tectonics

question 6

Multiple Choice

The Moon, Mercury, and Mars do not have plate tectonics because

• A) they have cooled so rapidly that they do not have enough internal convection to break up their thick crusts
• B) they have no oceans for subduction and seafloor spreading to occur in
• C) impacts have filled in the plate boundaries essentially turning the process off
• D) their crusts have dried up and thickened so the crust cannot be broken up into plates

---

Definitions:

Dissociative Fugue

A rare psychiatric disorder characterized by reversible amnesia for personal identity, including the memories, personality, and other identifying characteristics of individuality.

Hypomanic Episode

A period of persistently elevated, expansive, or irritable mood that is less severe than manic episodes but still noticeable.

Obsessive-Compulsive Disorder

A mental health disorder characterized by recurrent, unwanted thoughts (obsessions) and/or repetitive behaviors (compulsions).

Mysophobia

An irrational fear of germs or dirt, leading to excessive cleanliness and avoidance behaviors.