The Polar Caps of Mars Are Primarily Composed of Solid

question 21

Multiple Choice

The polar caps of Mars are primarily composed of solid:

• A) CO₂.
• B) water ice.
• C) methane.
• D) salt.

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Definitions:

Mph

Miles per hour, a unit of speed indicating the number of miles covered in one hour.

Dual Circuit Foot Valve

A type of valve used in air brake systems, allowing for control of two separate circuits with one pedal.

Air Disc Brake Rotors

Components of a disc brake system on vehicles, where compressed air is used to generate braking force on the rotors to slow down or stop the vehicle.

Spring Brake Chamber

A component in vehicle braking systems that uses a spring mechanism to apply force to the brakes, particularly for parking and emergency brakes.