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Scientists use the geologic time scale to illustrate the order in which events on Earth have happened. ... They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth. Later, scientists used absolute dating to determine the actual number of years ago that events happened.
Hi,
Scientists have used rock samples to date the Earth's past. They also might use Steno's principles.
Relative dating is the determination of the age of a rock or geological event by comparing with other rock/ geologic events. Absolute dating is a form of geologic dating that gives an actual date or age in history that the item was formed or died in years.
Steno's principles are:
Law of superposition - Bottom layer is the oldest, top layer of the youngest In undisturbed layers of sedimentary rock or magma.
Original horizontally - When sedimentary rock layers form, they are "created in a horizontal form.
The Principle of Lateral Continuity -<span> States that layers of sediment initially extend </span>laterally<span> in all directions.
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A person with a disability can look to the government for help. The government provides a social security fund for people unable to work due to a disability. The answer is true.
800,000-year Ice-Core Records of Atmospheric Carbon Dioxide (CO2) This page introduces Antarctic ice-core records of carbon dioxide (CO2<span>) that now extend back </span>800,000 years<span> at Dome C and over</span>400,000 years<span> at the Vostok site.</span>
