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Watch this video to find out how we use index fossils to establish the relative ages of rocks.
In previous lessons, we talked about the Geologic Time Scale and how scientists use it to piece together the history of the earth.
Now, when we use fossils to date rocks, we have to be careful. Remember that some species of animals and plants lived for a very long time, while others existed only for a short period of time.
We don't want to use fossils belonging to species that lived for too long; these fossils would show up in more than one rock layer.
Back in 1793, there lived a land surveyor named William Smith. 117 - National Association of Rocketry Lesson 30, p. 15 - James Joule (1818–1889) Special Feature on Kepler, p. If you did not purchase God’s Design for Science through the Answers in Genesis online store or you did not get the email with instructions, you can add the worksheets and quizzes to your Answers in Genesis account for free. You can download the worksheets at any time from the My Downloads section of your account.Fossil succession is based on the observation that certain assemblages, or groups, of animals and plants have lived during certain time periods over geologic history.For example, human beings and modern elephants are part of the same assemblage because we live in the same time period.Founded in 2002 by Nobel Laureate Carl Wieman, the Ph ET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations.Ph ET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery. 36 - Does Distant Starlight Prove the Universe Is Old? To make the process as simple as possible, we recommend logging in before you check out rather than checking out as a guest. 28 - The Galileo Affair: History or Heroic Hagiography? 34 - The Stars of Heaven Confirm Biblical Creation Lesson 7, p. There is no charge and you will not be asked for credit card information as long as you do not have anything else in your cart. 57 - New Discoveries of Order in the Sun Lesson 14, p. 95 - The Relative Size of the Earth & Sun Lesson 25, p. You will need to complete the checkout process through the store. 83 - Mercury—The Tiny Planet that Causes Big Problems for Evolution Lesson 23, p. 122 - Apollo: Humankind’s First Steps on the Lunar Surface Lesson 33, p. Choose the sets you need below and add them to your cart.