Multiple choice general knowledge science & technology What would a 100-pound person weigh on Mars? 40 60 55 38 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Mars has approximately 38% of Earth's surface gravity. A person weighing 100 pounds on Earth would weigh about 38 pounds on Mars (100 × 0.38 = 38). This is because Mars is smaller and less massive than Earth.