How did Switzerland get their borders?

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

Which country is currently the most populated country in the world? a. india b. china c. mongolia d. indonesia

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?