An astronaut has a smaller weight on the Moon than on Earth. What causes this difference, and how does his mass on the Moon compare with his mass on Earth?
- AThe Moon has a weaker gravitational field; mass on Moon is less than on Earth
- BThe Moon has a weaker gravitational field; mass on Moon is the same as on Earth
- CThe Moon has a weaker magnetic field; mass on Moon is less than on Earth
- DThe Moon has a weaker magnetic field; mass on Moon is the same as on Earth