Chapter 14.2 vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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radiometric dating | a method of determining the absolute age of an objects by comparing the relative percentages of a radioactive (parent) isotope and a stable (daughter) isotope
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isotope | atoms of the same element that differ in the number of neutrons they contain
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mass number | the sum of the numbers of protons and neutrons in the nucleus
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radioactive decay | when an isotopes nuclei release particles or radiant energy, or both, until the nuclei become stable
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radioactive isotope | an isotope that has an unstable nucleus and that emits radiation
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half-life | the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope
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microsphere | spherical in shape and composed of many protein molecules that are organized as a membrane
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coacervate | collections of droplets that are composed of molecules of different types, including lipids, amino acids, and sugars
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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