Fact 1: The mass of a planet causes the pull of gravity on that planet.

Fact 2: Well, weight is the force on a object caused by gravity trying to pull the object down.

Given the two facts above, answer the question "The mass of a planet causes the what?" with the following options: 
- harmful substances
 - global warming
 - weight of objects
 - It gets heated up
 - heat energy
 - to move people
 - kinetic energy
 - flow of electrons


 

   weight of objects      