Biology
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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| Fossil | A trace of an organism from the past
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| Relative Dating | An estimate of the age of a fossil based on the location of fossils in strata.
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| Radiometric Dating | Technique that uses the natural decay rate of isotopes to calculate the age of material.
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| Isotope | A form of an element that has the same number of protons but a different number of neutrons as another element
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| Half-Life | The amount of time it takes to for half of the isotopes in a sample to decay into its product isotope
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| Index Fossil | A fossil of an organism that existed during only specific spans of geologic time across large geographic areas.
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| Era | The second largest unit of geologic time, lasting tens to hundreds of millions of years and consisting of two or more periods
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| Period | Unit of geologic time that lasts tens of millions of years and is associated with a particular type of rock system.
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| Epoch | The smallest unit of geologic time, lasting several million years
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| Ribozyme | RNA molecule that can catalyze specific chemical reactions
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| Cyanobacteria | Bacteria that can carry out photosynthesis
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| Endosymbiosis | Ecological relationship in which once organism lives within the body of another
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| Cambrian Explosion | The earliest part of the Paleozoic era, when a huge diversity of animal species evolved
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Created by:
pategirl10
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