Teaching about Earth's history is a challenge for all teachers. Time factors of millions and billions of years is difficult even for adults to comprehend. However, "relative" dating or time can be an easy concept for students to learn. 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. 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.
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Relative dating - Wikipedia
Use this interactive to work out the relative ages of some rock layers from youngest to oldest. Drag and drop the text labels onto the diagram. Help us work out the relative ages of the layers of sedimentary rocks. Remember that the younger sedimentary rocks lie on top of older ones and were horizontal when formed. It looks as though one group of layers was tilted and eroded away before new rocks were formed on top. Drag and drop the text labels next to the layer you think is being described. If you want to redo an answer, click on the box and the answer will go back to the top so you can move it to another box.