Chapter 2 Summary

Over time, there were layers of ice and snow that formed. These huge bodies of ice began to move slowly, due to the forces of gravity. As these glaciers melted, river formed. Great chunks of ice would break away and float in the ocean. The water from the ocean would feed the snow that fell upon the land. This snow then fed the glaciers. This was the ice age.

At this time there was no ice cap at the North Pole, even though there was one at the South Pole. The ice moved to the south, blanketing many parts of Europe and South America. Life returned to these regions when the ice melted. These ice ages occurred about seven hundred million years ago. There were shorter ice ages about two hundred million years ago. The last one ended about fourteen thousand years ago...