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Why do we only have fossils of a fraction of things that have existed on earth?
Wiki User
∙ 6y ago
Many environments are not suitable for fossil formation.
Wiki User
∙ 6y ago
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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 of earth do the oceans cover?
72/100 i think
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.
Why do we only have fossils of a fraction of things that have exists on earth?
Because living things made up of soft tissues did not leave fossils and these accounted for most of the life forms on earth.
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 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.
Are index fossils the remains of species that existed on earth for relatively short periods of time?
yes
What are the remains of living things that have been perserved in earth's crust?
They are called fossils.
Approximately What fraction of the earth's total history have humans existed?
.00003
Which are the remains of species that existed on earth for relatively short periods and were abundant and widespread geographically?
It is index fossils.
Which are the remains of species that existed on Earth for relatively short periods of time were abundant and were wide spread geographically?
They are called index fossils, an aid to relative dating of rock.
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.
