2/15 & 2/ th Grade Agenda Collect HW: Reading & Notetaking p. 123 – 124 Late Science Fair Procedure Data table & Graphs Presentations Classifying Organisms Linnaeus Naming System Brain Pop (Evolution, Dolly the sheep, Extinction) Video: Simpson’s evolution Video: PBS Evolution Text Book Reading: 248 – 254 HW: Reading & Notetaking p. 125 – 128 Reminder: Science Fair Project Due 2/22 & 2/23 (50 Points)

Reflection Prompt: Write 3 reasons why species go extinct.

What are Trace Fossils? Trace Fossils provide evidence of the activities of ancient organisms. Such as Dinosaur foot prints Megalosaurus footprint A meat eating predator from the Jurassic

What are some of the ways that extinct animals can be preserved with little or no change? Tar Amber Freezing

The preserve remains or traces of an organism that lived in the past is called… Fossil Most fossils form when organism that die become buried in sediments Remains of most animals never becomes fossil

How do fossils form?

Gradualism vs Punctuated Equilibria Gradualism: The theory that evolution occurs slowly by steadily Punctuated Equilibria:Evolution occurs during short periods of rapid change separated by long periods of little or no change

What are homologous structures? Similar structures that related species have inherited from a common ancestor

Similarities in Early Development

Human Embryos have tails and gill slits

Similarities in DNA – Is an Elephant and this Shrew closely related? Scientists can determine how closely related the species are by comparing the DNA of different species DNA comparison has revealed that the tiny elephant shrew is closely related to the elephant

Branching Tree shows how closely related species are

Classification Classification is the process of grouping things based on their sim__________. The scientific study of how living things are classi______ is called taxonomy ilarities fied

Linnaeus naming system Linnaeus is a two word method of naming animals First word is called a genus and it is a classification grouping that contains sim_____ closely related organism. Second word is called species and it describes the distinctive feat_____ of an organism. ilar ure

Linnaeus Naming System Felis Concolor Felis Domesticus Felis Marmorata Cat Same Color Cat of the House Cat Marbled 1 st word is Genus 2 nd word is Species

Canine Family Tree Canine: conical teeth Lupus: means wolf

Human Evolutionary tree

Levels of Classification

Branching Tree Diagram A branching tree diagram shows probable evolutionary rela_________ among organisms tionships

Shared derived characteristic A branching tree diagram shows evolutionary relationships by grouping organisms according to shared chara________ Which characteristics appeared first? Backbone or Four Limbs Backbone cteristics

Reflection Prompt: Write 5 new facts that you learned during the brain pop video

Science Fair Project Due 2/22 & 2/23 (50 Points) Title: 3 points Question: 3 Points Hypothesis : 3 Points Background: 3 Points Materials: 3 Points Procedures: 3 Points Data Table: 3 Points Graph: 3 Points Bibliography: 2 Points

Results: 3 Points Results: The results should look for patt________ in your data and graphs. Describe the patterns in 2-5 sentences. Results are factual so DO NOT opi_______ or reasoning. erns nions

Discussion: 3 Points Discussion: The discussion should be one or more paragraphs. Why do you think you got the re______ that you did? Explain possible err______ and problems that occurred during your experiment? How can your experiment be impr________? What did you lea____ by doing this experiment? (Be scientific…do not say, “I learned that growing plants was fun.”) sult ors oved rn

Conclusion: 3 Points Conclusion: Restate your hypo________. Was your hypothesis supported or not supp_______? Explain why it was supported or why it was not (this should answer your initial question). thesis orted

Display Decoration: 5 Points Board must be 36 X 48 inches Is it Neat? Don’t forget about the decorations Make the Science Fair Board attractive with lots of drawing, decorations & photos

Challenging: 5 Points amount of time difficulty of the question and test quantity of trials/tests complexity of the experiment/experimental design

Scientific Validity accuracy of tests accuracy of scientific design controlled experiment One variable tested Other factors constant scientific measurement system

Reflection Prompt: Examine the poster boards in the back and copy the “discussion” section.