Slide 1 / 9 Slide 2 / 9 4th Grade Sediment Fossil Surprise Activity - PowerPoint PPT Presentation

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Slide 2 / 9 4th Grade Sediment Fossil Surprise Activity Slides 2015-10-02 www.njctl.org

Slide 3 / 9 Citation for Slides These slides are from National Geographic and can be found at: http://education.nationalgeographic.com/activity/sediment-fossil-surprise/ They are the "A Fossil Forms" slides.

Slide 4 / 9 A tylosaurus dies and sinks to the seabed.

Slide 5 / 9 Animals and bacteria remove its flesh.

Slide 6 / 9 Over time, many layers of sediment bury the remains.

Slide 7 / 9 Slowly, the sediments turn into rock and preserve the remains as a fossil.

Slide 8 / 9 Millions of years pass. Earth's plates shift and the ocean floor is uplifted. Waters retreat and seabeds become dry land.

Slide 9 / 9 More time passes. Natural forces like wind and water erode layers of sedimentary rock, exposing the fossil.