Students should be able to determine the total area that the dinosaur is in contact with the ground (4 x (1.52 x 3.14159) = or about 28 square feet. Their answers should be about 1 tsf (28t/28sf) - many of the students get this, but some students just skip the question. Why? I think because there's math involved, which makes me kind of sad. One student didn't skip the question, but instead wrote:
a lot, dinosaurs are huge
Thank you student. You don't get the points, but you get kudos for making me smile.