Choose between "Mary" and  "Jimbo". Question: Both Mary and Jimbo were out working in a field digging a hole. Mary was working very hard, while Jimbo was just standing around leaning on his shovel. Which person was producing more sweat? (A) Mary (B) Jimbo
Mary

Choose between "Mars" and  "Venus". Question: The mass of Mars is greater then that of Venus. Which planet emits stronger gravity? (A) Mars (B) Venus
Mars

Choose between "Black Hole" and  "Star". Question: The black hole has much more mass than the star so it also has (A) stronger gravity (B) weaker gravity
Black Hole