Questions: Sections 1-2

Comprehension Questions

1. What is the geologic time table?
2. About how old is the earth?
3. The scientific study of the earth is called what?
4. Scientists who study the earth are called what?
5. The geologic time table is divided into four main time periods called what?
6. What is the oldest era?
7. About how long did the Precambrian Era last?
8. What kind of rock formed during the Precambrian Era?
9. How was igneous rock formed?

Critical Thinking Questions

1. Why were no animals living during the Precambrian Era?
2. Why is the oldest rock found so far under the surface of the earth?