This is a writing exercise for the student, and answers will vary. Sample 1: What is the mass of a 100-kg person on a planet whose gravity is 1/10 of what it is on Earth? a. 1 kg b. 10 kg c. 100 kg d. 1000 kg The correct answer is C. The mass is a property of the object, and doesn't vary depending on its location. Sample 2: A person weighs 1000 N on Earth. What is his weight on a planet whose gravity is 1/10 of what it is on Earth? a. 1000 N b. 100 N c. 10 N d. 1 N The correct answer is B. The weight depends on how hard the planet pulls down on the person. When gravity is only a tenth of Earth's gravity, the person's weight will be a tenth of what it was on Earth.