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WorksheetsES MP4 Quiz 4-01
Total questions: 7
Worksheet time: 5mins
The table gives information about the radioactive decay of carbon-14. [Part of the table has been left blank for student use]. What is the amount of original carbon-14 remaining after 34,200 years?
1/8 gram
1/16 gram
1/32 gram
1/64 gram
According to the Earth Science Reference Tables, which element is used by Earth scientists for radioactive dating of rocks?
cobalt-60
plutonium-244
potassium-40
silicon-28
The diagram represents a clock used to time the half-life of a particular radioactive substance. The clock was started at 12:00. The shaded portion on the clock represents the number of hours one-half-life of this radioactive substance took to disintegrate. Which diagram best represents the clock at the end of the next half-life of this radioactive substance?
The diagram represents the radioactive decay of uranium-238. Shaded areas on the diagram represent the amount of
undecayed radioactive uranium-238 (U238)
undecayed radioactive rubidium-87 (Rb87)
stable carbon-14 (C14)
stable lead-206 (Pb206)
A geologist uses carbon-14 to measure the age of some material found in a sedimentary deposit. If the half life of carbon-14 is 5.7 x 1000 years and the sample shows that only 1/4 of the original carbon-14 is left, the age of the sample is about
5,700 years
11,400 years
17,100 years
22,800 years
According to the Reference Tables, which radioactive element would be most useful for determining the age of clothing that is thought to have been worn 2,000 years ago?
carbon-14
potassium-40
uranium-238
rubidium-87
