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Science chapter 8
Question | Answer |
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Rock cycle | The continuous process by which rock type changes into another rock type |
Igneous rock | Rock that forms when magma,lava, cools and solidifies |
Metamorphic rock | Rock that forms when texture or composition of existing rock changes due to heat or pressure |
Uniformitarianism | A principle that geologic processes that occurred in the past can be explained by current geologic processes |
Catastrophism | A principle that states geologic change occurs suddenly |
Paleontology | The scientific study of fossils |
Sedimentary rock | A rock that forms from compressed or cemented layers of sediment |
Relative dating | Any method of determining whether an event or object is older or younger than other events or objects |
Superposition | A principle that states that younger rocks lie above older rocks if the layers have not been disturbed |
Absolute dating | Any method of measuring the age of an event or object in years |
Radioactive dating | A method of determining the absolute age of an object by comparing the relative percentages of radioactive isotope and a stable isotope |