Why does the Sun have such a turbulent atmosphere?

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

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer