Water Has Been Discovered on Mars

question 122

Multiple Choice

Water has been discovered on Mars.In what form does it exist?

• A) Only as atmospheric water vapor,never condensing as liquid water or solid ice
• B) As a liquid,flowing continuously along the numerous flood valleys and meandering stream beds
• C) As permafrost,polar icecaps,and atmospheric vapor
• D) As a liquid in lakes and rivers

---

Definitions:

Form Tolerances

The allowable variations in the shape and appearance of manufactured parts.

Straightness

The measure of how closely a line or feature aligns with a true straight line, often evaluated to ensure precision in manufactured parts.

Circularity

The degree to which a form or surface approaches a perfect circle, often a crucial factor in precision engineering.

Angularity

A condition of having a specified angle or orientation in relation to a datum or reference plane, used in precision manufacturing and machining.