When earth is located you on the orbital position shown two constellations that are both visible to an observer on earth at midnight are

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

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

Which of the following is evidence to the past existence of glaciers?