February 26, 2013

1. February 26, 2013 (A Day) Agenda • DSJ #28 • Learning From Fossils (Notes) • Traces of Tracks • DSR #28

2. February 27, 2013 (B Day) Agenda • DSJ #28 • Learning From Fossils (Notes) • Traces of Tracks • DSR #28

3. DSJ #28 • Science Notebook – 55B • Watch this video “Earth Day” www.teachhub.com/earth-day-video-writing-prompts • Prompt: The polar bear and her cub left Spy Island because of the new oil rig. In 5 sentences or more, write at least 5 other ways animals have had to adapt because of humans.

4. Learning from fossils

5. Learning Objective Students will explain what scientists learn from fossils.

6. Trace Fossils • Trace fossils provide evidence of the activities of ancient organisms.

7. Trace Fossils • Trace fossils provide evidence of the activities of ancient organisms. • 10. Examples of trace fossils are footprints, animal trails, and burrows.

8. Trace Fossils • 11. Trace fossils, such as fossilized footprints, are useful to scientists because they can find answers to questions about an animal’s size and behavior.

9. Preserved Remains • Some processes preserve the remains of organisms with little or no change.

10. Preserved Remains • Some processes preserve the remains of organisms with little or no change. • 12. Three ways that organisms have been preserved are:

11. Preserved Remains • Some processes preserve the remains of organisms with little or no change. • 12. Three ways that organisms have been preserved are: • Trapped in tar

12. Preserved Remains • Some processes preserve the remains of organisms with little or no change. • 12. Three ways that organisms have been preserved are: • Trapped in tar • Preserved in amber (fossilized tree sap)

13. Preserved Remains • Some processes preserve the remains of organisms with little or no change. • 12. Three ways that organisms have been preserved are: • Trapped in tar • Preserved in amber (fossilized tree sap) • Being frozen

14. Learning From Fossils • 13. Scientists who study fossils are called paleontologists.

15. Learning from Fossils • 14.) All the information that paleontologists have gathered about past life is called the fossil record.

16. Learning From Fossils • 15. a. b. c. d. • The fossil record provides evidence about the history of life and past environments on Earth. • The fossil record shows that life on Earth has changed over time. • It reveals that simpler organisms have given rise to complex organisms. • It supports the theory of evolution.

17. Learning From Fossils • 16. Paleontologists use fossils to build up a picture of Earth’s past environments. Fossils can show how an environment has changed. Scientists can use fossils to learn about changes in Earth’s surface. False

18. Learning From Fossils • Scientists also study fossils to try to determine the rate at which evolution occurs. • 17. One hypothesis, called gradualism proposes that evolution occurs slowly but steadily.

19. Learning From Fossils • The fossil record, however, is incomplete. There are sometimes long periods when fossils show little or no change.

20. Learning From Fossils • The fossil record, however, is incomplete. There are sometimes long periods when fossils show little or no change. • 18. The hypothesis of punctuated equilibriaaccounts for the gaps in the fossil record. According to this hypothesis, species evolve quickly during relatively short periods.

21. Learning From Fossils • 19. Today, most scientists think that evolution can occur gradually at some times and more rapidly at others.

22. Glue in SNB **Please remember to use only TWO drops of glue!!** If everyone uses only TWO drops, a lot of glue is saved over time…. • 55A – Learning From Fossils (Notes)

23. Traces of Tracks • Read the paragraph at the top of the page and analyze the picture. • Answer the questions on a separate piece of paper. • You do not have to copy the questions. • Write your answer in complete sentences. • Turn your answers in to the teacher.

24. DSR #28 • Science Notebook – 55B (Under DSJ #28) • Prompt: What are paleontologists? What can they learn from the fossil record? Why do they study the fossil record?