'Major animal groups' presentation slideshows

Chapter 14 The History of Life

Chapter 14 The History of Life. Section 1: Fossil Evidence of Change. Section 2: The Origin of Life. The History of Life. Chapter 14. 14.1 Fossil Evidence of Change. Land Environments. Earth formed about 4.6 billion years ago.

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History of Life

History of Life. Ch. 14. History of Life. Fossil Evidence of Change Paleontologist - a scientist who studies fossils Fossil - preserved evidence of an organism Trace fossils - indirect evidence of organism. ex footprints, burrows, feces Molds and Casts - impression of an organism

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Warm-up

Warm-up. How old do you think the Earth is? What do you think fossils are?. Geologic Time. The Beginning of Earth. Earth formed about 4.6 billion years ago. Gravity pulled the densest elements to the center of the planet. After about 500 million years, a solid crust formed on the surface.

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Animal Body Plans

365 views • 16 slides