1. what country spans both europe and asia?

Some countries that span both Europe and Asia include Turkey, Russia and Kazakhstan. They are called trans continental countries. Even though Europe and Asia are continents in their own rites, geographically speaking they span one landmass known as Eurasia. The landmass rests on the tectonic plate known as the Eurasian plate. 

Earthquake waves that vibrate from side to side and up and down only through solids are known as "seismic waves."hope my answer has you : )