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    It takes advantage of the same i OS 7 tool Apple uses for its Air Drop feature, pictured right Instead of sending messages using mobile or data signal, the features lets users send messages to people in close proximity that are in Bluetooth or Wi-Fi Direct range - up to around 30 feet (9 metres).


    Radiometric age dating activity developing validating and using internal ratings methodologies and case studies

    Who's on First, University of California, Berkeley. This website is a book chapter about geologic time. This online version of their informative booklet contains short, content explanations about relative time, major geologic time divisions, index fossils for use in age dating, radiometric dating and the age of the earth.

    This 5-12-grade activity introduces students to the idea of sequencing information in overlapping data sets and the Principle of Superposition, which is a core concept in relative dating. Offers history of age dating, stratigraphic principles, rock correlation, fossil correlations, radiometric dating, and the geologic time scale. Short discussion of radioactive dating and stratigraphic principles.

    The electric force between the nucleus and electrons holds the atom together.

    Determining the Age of Rocks and Fossils, University of California, Berkeley.

    Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object.

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    3) To have students see that individual runs of statistical processes are less predictable than the average of many runs (or that runs with relatively small numbers involved are less dependable than runs with many numbers).Through this simulation, they will gain an understanding of how scientists are able to use isotopes such as U-235 and Pb-207 to determine the age of ancient minerals. Science helps drive technology, as it addresses questions that demand more sophisticated instruments and provides principles for better instrumentation and technique.Technology is essential to science, because it provides instruments and techniques that enable observations of objects and phenomena that are otherwise unobservable due to factors such as quantity, distance, location, size, and speed.It wasn't until well into the 20th century that enough information had accumulated about the rate of radioactive decay that the age of rocks and fossils in number of years could be determined through radiometric age dating.This activity on determining age of rocks and fossils is intended for 8th or 9th grade students.

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