Early Earth Foldable Ch 14 Fold 2 papers so that there are 4 flaps. The Titles of the for should be: 1)Redi and Pasteur 2)Miller and Urey 3)Endosymbiont Theory 4)Fossil Record

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

Redi’s experiment Redi_exp.gif dia/commons/2/27/Experiment_Pa steur_English.jpg Pasteur’s experiment

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

Cut out picture and glue it down and write the following bullets. 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.

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)

Cut out last picture and glue it down and write the bullet below. This is how eukaryotes evolved from prokaryotes. ntent/begin/cells/organelles/ima ges/endosymbiosis.jpg

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)

Basics of each Era Precambrian—4.6 billion years ago to 542 mya; 1 st life at 4 billion years, 1 st prokaryotes, 1 st eukaryotes, 1 st multicellular organisms Paleozoic—542 mya to 251 mya; appearance of 1 st 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