I would say the answer is Pangaea. I got this answer but google searching "all land" means what... and the 3rd or 4th one down it says Answers.com
But i worn you answers.com is a very slow sight...
Hope it helps
and please mark me as brainiest
Wave speed (m/s) = frequency (Hz) x wave length (m)
=0.2 x 100= 20m/s
The correct answer is a direct current
help show if a straight "trend line" represents the experimental data