Snow falls in the mountains, and gradually compresses into ice (and preserves some of the old air in the process!). This ice then travels downvalley under gravity, and this part is the glacier.
what happened was: 1. the sea water around the poles used to be heated by the sun but the pole ice never melted. 2. This changed and instead the ice was being heated but the sea water was freezing...
When a liquid hits it's freezing point (0 Degrees Celsius) the liquid atoms start to crystallize and expand. Thus, creating ice! when the ice melts, the atoms separate again and decrease in size....
Glacial ice is much more solid then regular ice. Glacial ice is also alot colder than regular ice. Glacial ice can also be up to 1/2 a mile thick. Glaciation is aan extremly powerful force. 2....