1) What is the approximate half-life of carbon-14? a) 2500 years b) 5750 years c) 25000 years d) 57500 years 2) What does carbon-14 form from? a) oxygen b) carbon dioxide c) nitrogen d) argon 3) What is the most abundant isotope of carbon? a) carbon-12 b) carbon-13 c) carbon-14 d) carbon-15 4) When does a the amount of carbon-14 in an organism start to decrease? a) when it is eaten b) when it is born c) when it is tested d) when it dies 5) How have humans increased the amount of carbon-14 in the atmosphere? a) by using radioactive dating b) by setting off nuclear bombs c) by using carbon-14 to kill cancer cells d) by destroying habitats 6) Where does carbon-14 form? a) in the upper atmosphere b) in the sea c) in living things d) in sciene labs 7) What element is used in radioactive dating to find the age of the earth? a) carbon b) plutonium c) radium d) uranium 8) Which of these objects would not contain carbon-14? a) newspaper b) hair from a mummy c) dodo beak d) dinosaur fossil 9) What data source can be used to calibrate carbon-14 dating? a) squirrel droppings b) tree rings c) permafrost samples d) nail clippings

carbon dating quiz

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