Relative dating activity answers
Scientists also use direct evidence from observations of the rock layers themselves to help determine the relative age of rock layers.
On a larger scale, even between continents, fossil evidence can help in correlating rock layers. This also means that fossils found in the lowest levels in a sequence of layered rocks represent the oldest record of life there. Now, look for a card that has either a "T" or "C" written on it.
This rock layer would be younger as indicated by the appearance of new fossils in the rock stratum. All of the fossils represented would be found in sedimentary rocks of marine origin.
WHO'S ON FIRST? RELATIVE DATING (Student Activity)
Explore this link for additional information on the topics covered in this lesson: Specific rock formations are indicative of a particular type of environment existing when the rock was being formed. Primitive armored fish; extinct NAME: Three-lobed body; burrowing, crawling, and swimming forms; extinct.
Use this information to sequence the cards in a vertical stack of fossils in rock strata.
In reading earth history, these layers would be "read" from bottom to top or oldest to most recent. Fossils provide important evidence of how life and environmental conditions have changed.
Sequence the remaining cards by using the same process. The complete "Paleontology and Dinosaurs" module takes approximately four weeks to teach.
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 dating interracial free sequence of rock layers. This is called relative dating. However, "relative" dating or time can be an easy concept for students to learn. The letters on the other cards have no significance to the sequencing procedure and should be ignored at this time.
Multibranched relative of starfish; lives attached to the ocean bottom; some living species "sea lilies". These major concepts are relative dating activity answers of the Denver Earth Science Project's "Paleontology and Dinosaurs" module written for students in grades Arrange them from oldest to youngest with the oldest layer on the bottom and the youngest on relative dating activity answers.
Since this card has a common letter with the first card, it must go on top of the "TC" card.
Snails and relatives; many living species NAME: 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. The first card in the sequence has "Card 1, Set A" in the lower left-hand corner and represents the bottom of the sequence.