I am testing my students' logic. What is the answer they should choose between "star" and "planet"? Logic test: A star has a greater mass then a planet. This means the (A) star (B) planet emits a stronger gravitational field
star

I am testing my students' logic. What is the answer they should choose between "wood" and "stone"? Logic test: Tony used his sawblade to cut both wood and stone. He learned that cutting wood generated less heat than cutting stone. This made him realize that the _____ was less rough (A) wood (B) stone
wood

I am testing my students' logic. What is the answer they should choose between "marsh" and "pier"? Logic test: A stick of bamboo experiences low resistance when dragged across a pier and high resistance when dragged across a marsh. This means the _____ will cause the bamboo to heat up more (A) marsh (B) pier
marsh