Thinking Spot 1
This is for all of us who cannot access the IVLE yet:
Module 1 thinking spot:
Why is evolution measured in Geologic time?
Does evolution imply gradual changes?
classmates, you are entering an intellectual mine field!
prepare to be challenged...!
posted by sol @ 10:34 AM
1 Comments:
Evolution is measured in terms of geologic time because geologic time scale is one of the longest wise and supposedly represents the earth's natural history according to the evidences of evolution and the continued search about the history of earth and life. Scientist estimate earth was formed for 6 billion years ago. According to their calculations, the first living organisms appeared about 3 billion years ago and modern humans at about 2 million years ago. In this examples, like radioactive dating, fossil placement within rocks and even rings in the tree is used to place natural objects within geologic time scale. Yes! Evolution imply gradual changes because based from the meaning of evolution which is a process that results in heritable changes in a population spread over many generations. The surface of the earth has undergone many changes throughout history. Even today, changes continue to happen due to the volcanic eruptions, earthquakes, wind and rain.Living things also died out or have changed during a long period of the earth's existence.
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