What effect does plate tectonics have on organic evolution?
Plate tectonics causes continents to move, creating geographic isolation that leads to speciation and affects climates and habitats, driving organic evolution.
What information did scientists use when developing the geologic timescale?
Scientists used fossil records, rock strata, and radiometric dating to develop the geologic timescale.
If Eras are marked by major changes in life forms, what distinguishes one Period from the next?
Periods are distinguished by smaller changes in life forms or significant extinctions within an era.
Distinguish between natural selection and artificial selection.
Natural selection is the process where organisms better adapted to their environment survive and reproduce; artificial selection is when humans selectively breed organisms for desired traits.
How old is the Earth?
The Earth is about 4.6 billion years old.
Order the units or geologic time from the longest to the shortest: Era, Period, Epoch, Eon.
Eon, Era, Period, Epoch
What is the geologic time scale?
The geologic time scale is a timeline of Earth's history divided into eons, eras, periods, and epochs based on major geological and biological events.
How were species affected by the break up of Pangaea?
The breakup of Pangaea isolated populations on different continents, leading to divergent evolution and the formation of new species.
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