GEOLOGIC TIME QUESTIONS
HONORS EARTH SCIENCE
GEOLOGIC TIME QUESTIONS NAME _______________
DATE ________ HOUR __
Use the geologic time scale (page 312) and pages 303-306 to answer the following:
1. Geologic time is divided into four large units of time called eras. List the 4 eras in order from oldest to most recent.
2. Which era lasted for the longest period of time? _________________
How long did it last?________________________
3. Which era covers the shortest length of time? ______________________
How long did it last? ____________________________
4. What era do we live in? _________________________ When did it start? ________
5. When did the Mesozoic era begin? ______________ When did it end? ____________
6. How long did the Mesozoic era last? _______________________
7. Why isn’t the Precambrian Era further subdivided into periods?
8. Time periods are shorter divisions of time than eras. Which period is the shortest?
How long did it last? _____________
9. What is an epoch?
10. What is the meaning of each of the era’s names?
Paleozoic-
Mesozoic-
Cenozoic-
11. Which era do we have the most information about? Explain why.
12. Why would one geologic period end and another begin?
13. ( see page 312) If you could time travel, which geologic period would you like to visit? Why?
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