2/21 & 2/22 - 7 th grade agenda learning objective: learn about evidence of evolution collect...
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2/21 & 2/22 - 7th Grade AgendaLearning Objective: Learn about evidence of evolutionCollect HW: Homologous StructuresScience Fair Check upPass back HW & TestVideo: PBS EvolutionText Book Reading: 244 – 246HW: Reading & Notetaking p. 123 – 124HW: Signed Grade PrintoutReminder Science Fair Board due 2/23 & 2/24 (50 Points)
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Reflection
• Prompt: Why is it better to describe evolution as a tree instead of a ladder?
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Science Fair Check up
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Science Fair Project due 2/22 & 2/23 (50 Points)
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Science Fair Project Due 2/23 & 2/24 (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
Discussion: 3 Points
Conclusion : 3 Points
Display Decoration: 5 Challenging: 5 Points
Scientific Validity: 5
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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 include opi_______ or reasoning.
erns
nions
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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
ovedrn
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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).
thesisorted
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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
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Challenging: 5 Points
• amount of time
• difficulty of the question and test
• quantity of trials/tests
• complexity of the experiment/experimental design
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Scientific Validity: 5 Points
• accuracy of tests
• accuracy of scientific design
• controlled experiment
• One variable tested
• Other factors constant
• scientific measurement system
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Reflection
• Prompt: Copy 1 paragraph of discussion from a science board.
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Did humans evolve from chimpanzees?
• NO• Humans did not evolve from
chimpanzees. Humans and chimpanzees are evolutionary cousins and share a recent common ancestor that was neither chimpanzee nor human.
• Humans are not "higher" or "more evolved" than other living lineages.
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Comparison of Bonobos and Chimpanzees
Bonobo Chimpanzee
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Flores man was 3 feet tall
• Lived in an Island in Indonesia 10,000 years ago
• Lived with Dwarf Elephants
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Gigantopithecus was 10 feet tall
• Lived in SouthEast Asia 100,000 years ago.
• Walked on all fours but can stand upright
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Can evolution be described as a tree or a ladder?
• Tree
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Fossils in which minerals replace all or part of an organism
is called…• Petrified Fossils
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Most Common Fossils are Molds and Casts. What are they?
• Mold: Hollow in shape and are formed when an organism buried in sediment dissolves
• Cast: Copy of an organism’s shape formed when minerals seep into a mold
Dinosaur Foot Print
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What is a carbon film fossil?
• Carbon film is an extremely thin coating of carbon on rock.
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What are Trace Fossils?
• Trace Fossils provide evidence of the activities of ancient organisms. Such as Dinosaur foot printsMegalosaurus footprint A meat eating predator from the Jurassic
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What are some of the ways that extinct animals can be preserved
with little or no change?• Tar• Amber• Freezing
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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
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How do fossils form?
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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
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What are homologous structures?
• Similar structures that related species have inherited from a common ancestor
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Similarities in Early Development
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Human Embryos have tails and gill slits
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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
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Branching Tree shows how closely related species are
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