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

Fossil Record—write the bullet below and then cut out the timeline Used to tell when organisms lived Absolute dating – based on radioactive measurements. Relative dating - based on location in rock layers (older are at the bottom).

Basics of each Era Precambrian—1st prokaryotes, 1st eukaryotes, 1st multicellular organisms Paleozoic—1st fish, amphibians, reptiles, land plants, birds Mesozoic—DINOSAURS and CONE-BEARING PLANTS Cenozoic—MAMMALS AND FLOWERING PLANTS

Miller and Urey-- On the underside of the 2nd flap write the following: Early earth atmosphere = 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, nucleotides 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, which formed 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. Progression of the evolution of organisms: Anaerobic prokaryotes  Photosynthetic prokaryotes  Aerobic prokaryotes  Eukaryotes  Multicellular organisms

Redi and Pasteur – write bullet points and leave space for 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 Pasteur’s experiment