How do relative and absolute dating differ. Pre/Post-Test Key.



How do relative and absolute dating differ

How do relative and absolute dating differ

States that geologic processes in the past can be explained by current geologic processes. Law of superposition The principle that states that younger rocks lie above older rocks if the layers have not been disturbed. If sedimentary rock layers are not horizontal then what has happened? Something has disturbed them after they were formed.

What can disturb rock layers so much that they place older layers on top of younger layers? Forces in the earth, such as tilting, folding, faults, and intrusions.

When the earth's forces move rock layers up or down unevenly, so that the layers are slanted. Tilting The bending of rocks when rock layers are squeezed sideways. Folding A break or crack in the Earth's crust along which rocks shift position. Fault A mass of igneous rock that forms when magma is injected rock and then cools Intrusion Unconformity A gap in the geologic rock record that forms when rock layers are eroded or when sediment is not deposited for a long time. What are the processes that can disturb sedimentary rock layers?

Nonconformity, diconformity, angular unconformity Law of crosscutting States that a fault or a body of rock, such as an intrusion, must be younger than any feature or layer or rock that the fault or rock body cuts through.

How can Scientists establish the relative ages of rocks? By using fossils in undisturbed sequence of rocks. Correlation A standard method used by earth scientists to obtain the relative ages of rock layers. Geologic Column An ordered arrangement of rock layers that is based on the relative ages of the rocks, with the oldest rocks at the bottom. If two layers match, then they are likely to be what at the same time? Determining the age of an event or object in years. How do scientists determine the absolute age of rocks?

Radioactive isotopes Atoms of the same element that have a different number of neutrons. Radioactive decay The breakdown of a radioactive isotope into a stable isotope of the same element or of another element.

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Relative and Absolute Dating PP



How do relative and absolute dating differ

States that geologic processes in the past can be explained by current geologic processes. Law of superposition The principle that states that younger rocks lie above older rocks if the layers have not been disturbed. If sedimentary rock layers are not horizontal then what has happened? Something has disturbed them after they were formed.

What can disturb rock layers so much that they place older layers on top of younger layers? Forces in the earth, such as tilting, folding, faults, and intrusions. When the earth's forces move rock layers up or down unevenly, so that the layers are slanted. Tilting The bending of rocks when rock layers are squeezed sideways.

Folding A break or crack in the Earth's crust along which rocks shift position. Fault A mass of igneous rock that forms when magma is injected rock and then cools Intrusion Unconformity A gap in the geologic rock record that forms when rock layers are eroded or when sediment is not deposited for a long time.

What are the processes that can disturb sedimentary rock layers? Nonconformity, diconformity, angular unconformity Law of crosscutting States that a fault or a body of rock, such as an intrusion, must be younger than any feature or layer or rock that the fault or rock body cuts through. How can Scientists establish the relative ages of rocks?

By using fossils in undisturbed sequence of rocks. Correlation A standard method used by earth scientists to obtain the relative ages of rock layers. Geologic Column An ordered arrangement of rock layers that is based on the relative ages of the rocks, with the oldest rocks at the bottom.

If two layers match, then they are likely to be what at the same time? Determining the age of an event or object in years.

How do scientists determine the absolute age of rocks? Radioactive isotopes Atoms of the same element that have a different number of neutrons. Radioactive decay The breakdown of a radioactive isotope into a stable isotope of the same element or of another element.

How do relative and absolute dating differ

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5 Comments

  1. Relative and absolute dating are dependent on the fossils and used to support the conclusions of the Darwinian order of descent with modification. Folding A break or crack in the Earth's crust along which rocks shift position. However, not all fossils or remains contain such elements.

  2. The changes in this content help determine the relative age of these fossils. The amount of fluorine absorbed indicates how long the fossil has been buried in the sediments. States that geologic processes in the past can be explained by current geologic processes.

  3. Fault A mass of igneous rock that forms when magma is injected rock and then cools Intrusion Unconformity A gap in the geologic rock record that forms when rock layers are eroded or when sediment is not deposited for a long time. The relative dating techniques are very effective when it comes to radioactive isotope or radiocarbon dating. States that geologic processes in the past can be explained by current geologic processes.

  4. To find their age, two major geological dating methods are used. However, not all fossils or remains contain such elements. By using fossils in undisturbed sequence of rocks.

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