- Mars is a kind of planet
- Earth is a kind of planet
- Earth is greater in mass than mars
- Hence, earth is a planet that has a greater mass than the planet mars

- Earth is a planet that has a greater mass than the planet mars
- As mass of a planet increases , the force of gravity on that planet will increase
- Hence, the force of gravity on earth will be greater than on mars

- The force of gravity on earth will be greater than on mars
- As the force of gravity decreases , the weight of the object will decrease
- Hence, objects will weigh less on mars than on earth because the force of gravity is less on mars

- The force of gravity on earth will be greater than on mars
- Gravitational force is similar to force of gravity
- The gravitational force of a planet does not change the mass of an object on that planet or celestial body
- So, objects will have the same mass on earth and on mars

- Objects will weigh less on mars than on earth because the force of gravity is less on mars
- Objects will have the same mass on earth and on mars
- Therefore, objects will weigh less and have the same mass on mars than on earth

- The mars rover is a kind of vehicle
- A vehicle is a kind of object
- So, the mars rover is a kind of object

- Objects will weigh less and have the same mass on mars than on earth
- The mars rover is a kind of object
- So, the mars rover will weigh less and have the same mass on mars than on earth

Hence, the mars rover will weigh less and have the same mass on mars than on earth
Question
A Mars Rover has been sent to explore and relay data from Mars. Mars is less massive than Earth. When compared with Earth, which is the best comparison between the mass and the weight of the Rover on Mars?

Context
- As the force of gravity decreases , the weight of the object will decrease 
- Mars is a kind of planet 
- The mars rover is a kind of vehicle 
- Earth is a kind of planet 
- Gravitational force is similar to force of gravity 
- A vehicle is a kind of object 
- Earth is greater in mass than mars 
- The gravitational force of a planet does not change the mass of an object on that planet or celestial body 
- As mass of a planet increases , the force of gravity on that planet will increase