What's More Activity 5.1 Directions: Match the following terms in Column A with their definitions in Match This Column B. Column A Column B _1. Eon A. time periods defined by the life forms that were...

Extracted text: What's More Activity 5.1 Directions: Match the following terms in Column A with their definitions in Match This Column B. Column A Column B _1. Eon A. time periods defined by the life forms that were present; usually measured in terms of tens of millions to hundreds of millions of years _2. Period B. smaller divisions of time; usually measured in millions to tens of millions of years 3. Era C. the longest period of time; measured in billions of years _4. Epoch D. second longest period of time; measured in hundreds of millions to billions of years