1 / 15

Fossils: Windows into the Past

Fossils: Windows into the Past. Essential Question: Explain the use of fossils as evidence of Earth’s history and its life forms. Agenda. Monday – Data Sheet Tuesday – Wednesday – Thursday – Quiz Friday –. Vocabulary . Paleontology Fossil Fossil Record Mold Cast. Petrified

devon
Download Presentation

Fossils: Windows into the Past

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fossils: Windows into the Past Essential Question: Explain the use of fossils as evidence of Earth’s history and its life forms.

  2. Agenda • Monday – Data Sheet • Tuesday – • Wednesday – • Thursday – Quiz • Friday –

  3. Vocabulary • Paleontology • Fossil • Fossil Record • Mold • Cast • Petrified • Preserved • Carbonized • Trace • Trilobite

  4. Concept • Uses of Fossils • Types of Fossils

  5. Describe what you see in this picture. • What is it? • Where do you think it is? • How did it get there? • What inferences can you draw from it?

  6. Paleontology • The study of fossil evidence to learn about ancient life forms.

  7. Fossil • The preserved remains of organisms that lived in the distant past. • Can also be evidence of organisms’ behaviors that were preserved.

  8. Fossil Record • The evidence provided by fossils about what Earth was like millions of years ago. • Clues provided include: • Climate & atmosphere changes. • Geology – plate tectonics, erosion. • Diversity of life on Earth – different organisms that have lived and how they have changed.

  9. #1 – Mold Fossil • Sediments bury an organism and change into rock. Over time the organism decays and leaves a cavity (hole) in the shape of the organism.

  10. #2 – Cast Fossil • When a mold fossil is filled with sand or mud that hardens into the shape of the organism.

  11. #3 – Petrified Fossil • When minerals soak into buried remains, replace the remains, and then change into rock.

  12. #4 – Preserved Fossil • Forms when organisms do not decay at all because they are trapped in rock, ice, tar, or amber.

  13. #5 – Carbonized Fossil • Body parts like leaves, stems, and flowers are pressed between layers of soft mud that hardens. • It squeezes away the decayed organism leaving only an imprint.

  14. #6 – Trace Fossil • Mud or sand hardens into stone where a footprint, trail, or burrow of an organism was left behind.

  15. Example: Trilobite • Ranged in size from 1-3 inches to 2-3 feet. • Existed for almost 300 million years. • Went extinct about 250 million years ago. • Related to today’s horseshoe crabs.

More Related