What mountain range separates france from spain?

What forms of energy are involved when snow on a mountain breaks loose, resulting in an avalanche? during an avalanche, the( 1 ) energy of the snow on the mountain is converted into ( 2 ) energy as the snow cascades down. ( 1 ) a. elastic b. kinetic c. potential d. radiant ( 2 ) a. chemical b. kinetic c. nuclear d. potential

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

All of the following occurred due to the invention of the railroad except