The Graph Below Plots the Escape Velocity of Each Planet

question 54

Multiple Choice

The graph below plots the escape velocity of each planet along the vertical axis and its surface temperature along the horizontal. The lines plotted in the figure are the average speeds of gas particles as a function of temperature for various gases. Which of the planets or satellite plotted in this diagram is least able to hold an atmosphere?

• A) Mars
• B) Moon
• C) Mercury
• D) Venus
• E) Earth

---

Definitions:

Hypoxemia

A medical condition where there is a deficiency of oxygen in the blood, leading to compromised oxygen delivery to tissues.

Hematocrit

A blood test measurement that indicates the percentage of red blood cells in the total blood volume.

Glycosylated Hemoglobin

Also known as hemoglobin A1C, a measure of the average blood sugar levels over the past two to three months, used to monitor diabetes control.

Lung Compliance

A measure of the lung's ability to stretch and expand; low compliance indicates stiff lungs, while high compliance signifies lungs that are too easy to inflate.