Superposition dating

15-Sep-2016 01:45

The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth can be an interesting study for students of all ages.Teaching about Earth's history is a challenge for all teachers.The second method is called absolute dating and is done by analysing the amount of radioactive decay in the minerals of the rocks.Scientists find out the age of a dinosaur fossil by dating not only the rocks in which it lies, but those below and above it.Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata.Once students begin to grasp "relative" dating, they can extend their knowledge of geologic time by exploring radiometric dating and developing a timeline of Earth's history.Time factors of millions and billions of years is difficult even for adults to comprehend.

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The method of reading the order is called stratigraphy (layers of rock are called strata).

In this activity, students begin a sequencing activity with familiar items — letters written on cards.

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.

This is because new sediments are always laid down on top of sediments that have already been deposited.

So, when looking at the history of a cliff face, it is important to read the story it tells from the bottom layer up.

PALEONTOLOGY, AND in particular the study of dinosaurs, is an exciting topic to people of all ages.

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