Geology relative dating lab
Shelled, amoeba-like organism NAME: Although most attention in today's world focuses on dinosaurs and why they became extinct, the world of paleontology includes many other interesting organisms which tell us about Earth's past history.
The module is an integrated unit which addresses the following National Science Education Standards: Fossils provide important evidence of how life and environmental conditions have changed. In reading earth history, these layers would be "read" from bottom to top or oldest to most recent.
When you complete this geology relative dating lab, you will be able to: Primitive form of chordate; floating form with branched stalks; extinct NAME: Multibranched relative of starfish; lives attached to the ocean bottom; some living species "sea lilies" NAME: This will enable your teacher to quickly check whether you have the correct sequence.
Many were large a few rare species were 5 feet in length ; crawling and swimming forms; extinct.
Primitive armored fish; extinct NAME: Clams and oysters; many living species. Once an organism disappears from the geology relative dating lab it cannot reappear later. Now, look for a card that has either a "T" or "C" written on it.
The fossils represented by the letters on this card are "younger" than the "T" or "C" fossils on the "TC" card which represents fossils in the oldest rock layer. Primitive armored fish; extinct.
If the letters "T" and "C" represent fossils in the oldest rock layer, they are the oldest fossils, or the first fossils formed in the past for this sequence of rock layers. Fossils indicate that many organisms that lived long ago are extinct.
WHO'S ON FIRST? RELATIVE DATING (Student Activity)
Use this information to sequence the cards in a vertical stack of fossils in rock strata. The first card in the sequence has "Card 1, Set A" in the lower left-hand corner and represents the bottom of the sequence.
By using this information from rock formations in various parts of the world and correlating the studies, scientists have been able to establish the geologic time scale.
The study and comparison of exposed rock layers or strata in various parts of the earth led scientists in the early 19th century to propose that the rock layers could be correlated from place to place. The "Who's On First? This would also mean that fossils found in the deepest layer of rocks in an area would represent the oldest forms of life in that particular rock formation.
This is called relative dating. By correlating fossils from various parts of the world, scientists are able to give relative ages to particular strata.
Once they are able to manipulate the cards into the correct sequence, they are asked to do a similar sequencing activity using fossil pictures printed on "rock layer" cards. On a larger scale, even between continents, fossil evidence can help in correlating rock layers. All of the fossils represented would be found in sedimentary rocks of marine origin.
Relative dating tells scientists if a rock layer is "older" or "younger" than another.
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