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Question
When did Life first appear?
When did Life first appear?
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Solution
Origin of Life
- By studying the types of fossils in different rock strata and determining their age by radioactive dating method, geologists have constructed a geological time scale or stratographical scale.
- The scale is the calendar of the earth's past history indicating the evolution of life through time recorded in the sequence of rocks.
- The geological time was developed by Giovanni Arduiana (1760), which estimated that the earth was formed about 4.6 or 5 billion years ago and life on earth originated about 3.6 billion years ago.
Origin of Life
- By studying the types of fossils in different rock strata and determining their age by radioactive dating method, geologists have constructed a geological time scale or stratographical scale.
- The scale is the calendar of the earth's past history indicating the evolution of life through time recorded in the sequence of rocks.
- The geological time was developed by Giovanni Arduiana (1760), which estimated that the earth was formed about 4.6 or 5 billion years ago and life on earth originated about 3.6 billion years ago.
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