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Dating service print

Scientists also use direct evidence from observations of the rock layers themselves to find the relative age of rock layers.

Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata. Students place on the table and work in small groups to sequence the eight cards by comparing letters that are common to individual cards, and therefore, overlap. The first card in the sequence has “Card 1, Set A” in the lower left-hand corner and represents the bottom of the sequence.

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.

In reading Earth history, these layers would be “read” from bottom to top or oldest to most recent.

Teaching about Earth’s history is a challenge for all teachers.

The idea of millions and billions of years is difficult for children and adults to comprehend.

Scientists have good evidence that Earth is very old, approximately four and one-half billion years old.

Scientific measurements such as radiometric dating use the natural radioactivity of certain elements found in rocks to help determine their age.

Since this card has a common letter with the first card, it must go on top of the “TC” card.