Based on the length of a football field and the timeline of earth's history, the first 10 yards represents 460 million years.
Beginning from 460 million years ago, there was massive explosion and expansion of life on earth.
A timeline of earth's history shows the events that occurred from the beginning when earth was formed 4.6 billion years ago until today.
In this activity, a football field is used to represent the timeline of earth's history.
Each end of the football field represents the two end zones, Earth's beginning and TODAY end zone.
Thus, the first 10 yards equals = 46,000,000 × 10 The The first 10 yards = 460,000,000 years.
From the TODAY end zone, the the first 10 yards = 460,000,000 years.
460,000,000 years ago marked the time from the appearance of the first plants until humans and all life on earth as it is today.
This, meant that within this period, there was massive explosion and expansion of life on earth.
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