1. sea levels rise and lower when
form and break up over time.
2. the first mammals did not appear on land until near the end of the
3. the first four-legged animals to reach land were classified as
4. pangea was fully formed during the late period.
respond to the following based on your reading.
5. briefly explain the causes of glaciation and the processes that cause glaciers to grow.
6. briefly explain how changes in sea level and evidence of past marine life are related.