1. Chapter 23 Earth Science Alex Newell 4/4/10

2. The Paleozoic Era Continental setting Changes in sea level Life moves to land The Late Paleozoic

3. Paleogeography What geologists refer to the ancient geographic setting of an area

4. Passive margin The edge of a continent is called a margin; when there is no tectonic activity, along as a margin

5. Transgression Occurs when sea level rises and the shoreline moves further inland

6. Regression Occurs when sea level falls and causes the shoreline to move seaward

7. Mass extinction When an unusually large number of organisms become extinct over a relatively short period of geologic time

8. Amniote egg Reptiles that evolved from the early amphibians developed a new type of egg