10 Questions
What is the main purpose of the geologic time scale?
To distinguish Earth's history based on life-forms
What are fossils?
Remains or evidence of an organism from the geologic past
How do geologists establish the existence of Earth's pre-human history?
Through the discovery of fossils
What is the Phanerozoic eon characterized by?
Abundant, complex fossilized remains
What is the informal term used to refer to the Hadean, Archean, and Proterozoic eons collectively?
"Precambrian"
What is the main function of the geologic time scale?
To classify Earth's history based on life-forms and geological events
What characterizes the Phanerozoic eon?
Presence of abundant and complex fossilized remains
What defines a geologic eon?
Hundreds or thousands of years
What is the informal term used to collectively refer to the Hadean, Archean, and Proterozoic eons?
"Precambrian"
What are fossils primarily composed of?
Silt or rock
Learn about the geologic time scale and how it distinguishes Earth's history based on life-forms that existed at certain times since the planet's formation. Explore the significance of fossils in understanding the geologic past.
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