Which of These Is True of Mars

question 45

Multiple Choice

Which of these is true of Mars?

• A) Linear canals, apparently built to carry water for irrigation, crisscross the planet.
• B) Water can be seen in the bottoms of river valleys on spacecraft photographs.
• C) Mars has dry riverbeds but no liquid water on its surface at the present time.
• D) There is no evidence of water ever having been on Mars.

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Definitions:

Patella

A small flat triangular bone located at the front of the knee joint; commonly known as the kneecap.

Frontal

Pertaining to the front part of something, often referring to the frontal lobe of the brain which is involved in decision making and problem-solving.

Maxilla

One of the pair of bones forming the upper jaw in humans and most vertebrates, holding the upper teeth.

Zygomatic

Pertaining to the cheekbone or zygoma, a bone on the side of the skull forming the prominence of the cheek.