For Water to Have Been Stable on Mars in the Past

question 5

Multiple Choice

For water to have been stable on Mars in the past,

• A) temperature must have been higher and the atmospheric pressure lower
• B) temperature must have been lower and the atmospheric pressure higher
• C) both the temperature and the atmospheric pressure must have been higher
• D) both the temperature and the atmospheric pressure must have been lower

---

Definitions:

Peristalsis

The coordinated, rhythmic contractions of smooth muscle that occur in the digestive tract to move food and waste products through the body.

Scaphoid Abdomen

A medical term describing a abdomen that appears sunken or hollowed out, often signifying undernutrition or certain diseases.

Rib Margin

The lower edge or boundary of the rib cage, which can be palpated during a physical examination to assess for enlargement or tenderness.

Pubic Bone

The pubic bone is part of the pelvis and is located at the front of the pelvic girdle, playing a key role in supporting the lower abdomen.