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Early Earth Foldable

Explore the origins of life with 4 interconnected flaps covering key figures, theories, and the fossil record. Learn how Redi, Pasteur, Miller, and Urey's experiments debunked spontaneous generation and paved the way for biogenesis. Discover the primordial soup concept, the endosymbiont theory explaining eukaryotic evolution, and the timeline of life on Earth from Precambrian to Cenozoic eras.

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Early Earth Foldable

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  1. Early Earth Foldable Ch 14 Fold 2 papers so that there are 4 flaps. The Titles of the for should be: Redi and Pasteur Miller and Urey Endosymbiont Theory Fossil Record

  2. Redi and Pasteur—write bullet points and cut out and glue left 2 pictures • For a long time scientists thought life came from non-living things (spontaneous generation) • Redi and Pastuer proved that life only came from other living things (biogenesis) with their experiments • Redi used covered rotting meat to prove maggots came from flies not the meat itself • Pasteur used flasks with broth that filtered out microorganisms in the air

  3. Redi’s experiment Pasteur’s experiment http://elf.xs.edu.ph/mywiki/images/Redi_exp.gif http://upload.wikimedia.org/wikipedia/commons/2/27/Experiment_Pasteur_English.jpg

  4. Miller and Urey-- On the underside of the 2nd flap write the following: • Early earth atmosphere was composed of Carbon dioxide, water, nitrogen, ammonia, methane and hydrogen gas • These early components combine with lightening gave the primordial soup mixture to make the first early organic molecules (building blocks of living things) according to Miller and Urey’s theory

  5. Miller and Urey used this set up to simulate the early Earth’s conditions and made amino acids, fatty acids, nucleoties and monosaccharides, or the building blocks of organic molecules. This proved it could have happened this way. Cut out picture and glue it down and write the following bullets.

  6. Endosymbiont Theory—write the following bullets • Building blocks then built the organic molecules, then organic molecules built the first cells—anaerobic, heterotrophic prokaryotes • Adaptations such as photosynthesis (made oxygen), aerobic respiration (used oxygen and made more ATP than before) occurred • Then larger cells engulfed smaller cells that did photosynthesis or aerobic respiration and used them in a symbiotic relationships (endosymbiont theory)

  7. Cut out last picture and glue it down and write the bullet below. • This is how eukaryotes evolved from prokaryotes. http://learn.genetics.utah.edu/content/begin/cells/organelles/images/endosymbiosis.jpg

  8. Fossil Record—write the bullet below and then cut out the timeline • Fossil record is used to date when organisms lived based upon radioactive measurements (absolute dating) or where they occur in layers of rock (relative dating—older fossils are in lower layers)

  9. Basics of each Era • Precambrian—4.6 billion years ago to 542 mya; 1st life at 4 billion years, 1st prokaryotes, 1st eukaryotes, 1st multicellular organisms • Paleozoic—542 mya to 251 mya; appearance of 1st fish, amphibians, reptiles, land plants, birds • Mesozoic—251 mya to 66 mya; appearance of mammals, flowering plants, insects; dominated by DINOSAURS and CONE-BEARING PLANTS • Cenozoic—66 mya to present; appearance of humans; dominanted by MAMMALS AND FLOWERING PLANTS

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