 |
Java Games: Flashcards, matching, concentration, and word search. |
 |
|
12.2 The Geologic Time Scale
The geologic time scale divides Earth's history based on major past events.
|
| A | B |
|---|
| index fossil | fossil of an organism that existed during only specific spans of geologic time across large geographic areas |
| geologic time scale | time scale representing the history of Earth |
| era | second largest unit of geologic time, lasting tens to hundreds of millions of years and consisting of two or more periods |
| period | unit of geologic time that lasts tens of millions of years and is associated with a particular type of rock system |
| epoch | smallest unit of geologic time, lasting several million years |
|
|
|
|
|
BVNW |
Blue Valley Northwest High School |
| Overland Park, KS |
|
|
|
|
|
| |
