The numerical age of a geologic event in the rock record is __________. a. the n
ID: 242 • Letter: T
Question
The numerical age of a geologic event in the rock record is __________. a. the number of years that has elapsed between the event and the present day b. the number of years that has elapsed between the event and the beginning of human civilization c. the amount of time that has elapsed between the event and another similar geologic event d. the amount of time that has elapsed between the event and the beginning of Earth historyComplex lifeforms began to evolve at around 500 million years ago. Given the age of the planet, complex life forms have been around for approximately what percent of Earth's history?
80%
50%
25%
10%
3%
The numerical age of a geologic event in the rock record is __________. the number of years that has elapsed between the event and the present day the number of years that has elapsed between the event and the beginning of human civilization the amount of time that has elapsed between the event and another similar geologic event the amount of time that has elapsed between the event and the beginning of Earth history
Complex lifeforms began to evolve at around 500 million years ago. Given the age of the planet, complex life forms have been around for approximately what percent of Earth's history?
80%
50%
25%
10%
3%
Complex lifeforms began to evolve at around 500 million years ago. Given the age of the planet, complex life forms have been around for approximately what percent of Earth's history? 80%
50% 25% 10% 3% a. the number of years that has elapsed between the event and the present day b. the number of years that has elapsed between the event and the beginning of human civilization c. the amount of time that has elapsed between the event and another similar geologic event d. the amount of time that has elapsed between the event and the beginning of Earth history
Complex lifeforms began to evolve at around 500 million years ago. Given the age of the planet, complex life forms have been around for approximately what percent of Earth's history?
80%
50%
25%
10%
3%
Explanation / Answer
the number of years that has elapsed between the event and the beginning of human civilization
10%