Angle 1 is a complement of angle 2 and m angle 1 =66 degrees find angle 2

Ateam of researchers calculates that a glacier will melt completely away in the next 100 years. which land structure will most likely be left behind after the glacier melts?

What first caused people to consider that the continents were once one large landmass?

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.