Relative dating activity worksheet, quiz & worksheet goals
The graptolite, placoderm, ammonite, ichthyosaur, and shark's tooth could possibly be used as index fossils since they are found in only one layer.
Arrange them from oldest to youngest with the oldest layer on the bottom and the youngest on top.
Relative Dating Worksheets - Printable Worksheets
Scientific measurements such as radiometric dating use the natural radioactivity of certain Relative dating activity worksheet found in rocks to help determine their age.
Locally, physical characteristics of rocks can be compared and correlated.
Keep in mind that extinction is forever. It is not uncommon to have students reverse the M and D for example and begin the sequence with DM because that is the way they are printed on the card. It is recommended that students complete Procedure Set A and answer the associated Interpretation Questions correctly before proceeding to Set B.
If certain fossils are typically found only in a particular rock unit and are found in many places worldwide, they may be useful as index or guide fossils in determining the age of undated strata. Please note that none of the letters in this sequence may be reversed and still be correct.
For example, most limestones represent marine environments, whereas, sandstones with ripple marks might indicate a shoreline habitat or a riverbed. For Set Byou may want to color code each organism type i.
WHO'S ON FIRST? RELATIVE DATING (Student Activity)
Stratigraphic Section for Set B. All of the fossils represented would be found in sedimentary rocks of marine origin. The fossils within rock layer OXD i.
Explore this link for additional information on the topics covered in this lesson: Each card represents a particular rock layer with a collection of fossils that are found in that particular rock stratum. The Law of Superposition, which states that in an undisturbed horizontal sequence of rocks, the oldest rock layers will be on the bottom, with successively younger rocks on top of these, helps geologists correlate Bolivia dating sites layers around the world.
This activity illustrates this law because when the cards are placed in the correct order, the vertical stack shows the oldest fossils in a rock layer in the bottom of the stack and the youngest fossils in rock stratum on the top.
This would also mean that fossils found in the deepest layer of Relative dating activity worksheet in an area would represent the oldest forms of life in that particular rock formation.
In a "normal" horizontal sequence of rocks, the oldest rock layers will be on the bottom with successively younger rocks on top. Use this information to sequence the cards in a vertical stack of fossils in rock strata. The letters on the other cards have no significance to the sequencing procedure and should be ignored at this time.
The first card in the sequence has "Card 1, Set A" in the lower left-hand corner and represents the bottom of the sequence. When you complete this activity, you will be able to: Return to top To enhance this activity, have students match the fossil sketches to real fossils.
Once an organism disappears from the sequence it cannot reappear later.