What part of the united states is most likely to experience earthquakes and volcanoes (tectonic activity)?

:calculate the sum of the interior angles of a 13-sided polygon.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

How does sea floor spreading relate to supercontinents?