In this day of the Space Age, everyone knows that the earth is round. One merely has to look at a photograph taken from either the moon or an orbiting space satellite to prove the point. But suppose that you do not have a photograph handy or suppose that your viewer refuses to believe that the photo is real. Of course it is rather unlikely that the latter event would occur, but without such a visual aid how would you prove that the earth is round?
Iowa Science Teachers Journal
© Copyright 1982 by the Iowa Academy of Science
Young, Darrell D.
"How Would You Prove the Earth is Round?,"
Iowa Science Teachers Journal: Vol. 19
, Article 19.
Available at: https://scholarworks.uni.edu/istj/vol19/iss1/19