The Polar Caps on Mars Are Now Known to Consist

question 35

Multiple Choice

The polar caps on Mars are now known to consist of

• A) methane (CH₄), ammonia (NH₃), and water (H₂O) ices, whose relative abundances vary with the seasons.
• B) a combination of carbon dioxide (CO₂) ice and water (H₂O) ice.
• C) only carbon dioxide (CO₂) ice, which is very volatile and melts easily.
• D) only water (H₂O) ice, which does not melt easily and survives the summer heat.

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Definitions:

Leading Cause

A leading cause refers to the primary or most significant factor contributing to a result or outcome, often used in the context of health to describe the top illness or condition resulting in morbidity or mortality.

Disease

A condition that negatively affects the structure or function of part or all of an organism, and that is not due to any external injury.

Sudden Infant Death Syndrome (SIDS)

The unexplained death of a seemingly healthy baby.

Unexplained Death

Refers to a death that occurs without an obvious or immediately identifiable cause, often leading to further investigation.