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For what fraction of geologic time life has existed on earth for what fraction of geologic time have human existed on the earth?
Approx 1/22500 of it.
What percentage of time has life existed since Earth formed?
it has been for 90%
What is the age of the oldest known fossils on earth 1 billion 2.2 billion 3.5 billion?
Easily 3.5 billion minutes!
How can you express the amount of nitrogen in the earth's atmosphere as a fraction?
You can express is at a proportion by mass or by volume.
What fraction would represent the size of the moon compared to the size of the earth?
It is approx 105/5189.
Why do we only have fossils of a fraction of the thins that have existed on earth?
This is because some of the things that existed were eaten by other things and so ceased to exist.
Why do we only have fossils of a fraction of the thing have existed on earth?
Because for much of the earth's early history, living things were made up of soft tissue only.
For what fraction of geologic time life has existed on earth for what fraction of geologic time have human existed on the earth?
Approx 1/22500 of it.
Why do we only have fossils of a fraction of things that have exists on earth?
Fossilization is a rare process that requires specific conditions to preserve organic material. Many organisms decay before they can fossilize, and even those that do fossilize may not be discovered due to factors like erosion, burial, or the difficulty of fossil extraction. As a result, the fossil record represents only a small fraction of the total biodiversity that has existed on Earth.
What are the remains of species that existed on Earth for a short period of time?
index fossils
How did fossil affect what people thought about creature on Earth?
Fossils affect how people think about ancient creatures of Earth. The fossils show animals that people did not previously know existed.
Approximately What fraction of the earth's total history have humans existed?
.00003
How are fossils used to helps understand the history of earth?
Scientists can use fossils to learn about what happened about what Earth was like in the past. A fossil is any evidence A fossil is any evidence that life once existed in a place.
What fraction of earth's history have human-like animals existed show work?
59%
What fossils are the remains of species that existed abundantly on earth for relatively short periods of time widespread areas?
Index Fossil
Why do we only have fractions of fossils of the things that have existed on Earth?
There are very many reasons why some living things did not fossilise.natural processes will bio-degrade living things after their death.soft tissue does not usually fossilise.pre-historic predators and scavengers may have destroyed or scattered the potential fossil.modern predators or scavengers may have destroyed or scattered the potential fossil.geological changes may have obliterated fossils.
What are the remains of living things that preserved in the earth's crust?
They are called fossils.
