Agenda: 1.WarmUp 2.How It’s Made 3.Lottery 4.Timeline 5.Video

Lottery Ticket 3 WarmUps – 1/14, 1/15, 1/18______/3 Journey of Oil 10 facts______/10 Carbon Cycle Poster ______/25

 Earth Forms  4.56 billion years ago (b.y.a.)  Gravity pulled together dust, rock, and ice in space; very hot  Atmosphere was made up mostly of water vapor, carbon dioxide, and nitrogen; no oxygen  Oceans formed from the water vapor condensing in clouds, torrential rains cooled the Earth and began filling the lowlands

 Continents Develop  500 million years after Earth’s formation  Several super continents existed, like Rodinia

 According to scientists, how were the oceans formed?  As the planet cooled, water vapor turned to rain. Rain last millions of years. Agenda: 1.WarmUp 2.How It’s Made 3.Timeline 4.How the Earth was Made Agenda: 1.WarmUp 2.How It’s Made 3.Timeline 4.How the Earth was Made

 Cyanobacteria (prokaryotes evolve)  3.5 b.y.a. one-celled organisms existed, no nucleus  Made their own food through photosynthesis  took in CO2 and used sunlight to create carbohydrates, released oxygen into environment

 Stromatolites become abundant  2.5 b.y.a.  Layered mounds of calcium carbonate deposited by cyanobacteria  Formed in warm, shallow water along sheltered coastlines

 Oxygen builds up in atmosphere  2 b.y.a.  Plants on the ground and cyanobacteria used photosynthesis to increase the oxygen levels in the atmosphere

 Eukaryotes Evolve  1.8 b.y.a.  Cellular organism containing a nucleus  In the form of red and green algae, many were one-celled

 Fossils of multi-celled organisms  600 m.y.a  Soft-bodied animals evolved from eukaryotes  Resemble worms, jellyfish, and corals living in the oceans today

 Precambrian time ends 542 million years ago  Cambrian period begins

 What purpose did the cyanobacteria, stromatolites, and early eukaryotes all have in common? Agenda: 1.WarmUp 2.How It’s Made 3.Timeline 4.Movie

 1. According to scientists, how did the Earth form?  A. It was there all along  B. A star exploded  C. Gravity pulled in rocks, dust and ice which all collided to form Earth  D. Dinosaurs made it

 2. What were responsible for oxygen being pumped into the atmosphere?  A. Stromatolites  B. Cyanobacteria  C. Moss  D. Both A and B

 3. How did the oceans form on Earth?  A. As the planet cooled, water vapor began to condense and it rained for millions of years  B. Ice melted  C. Rivers flowed into the lowlands and formed oceans  D. None of the above

 4. What is the main difference between prokaryotes and eukaryotes?  A. Prokaryotes have a nucleus  B. Eukaryotes have a nucleus  C. Eukaryotes were the first organisms on Earth  D. There is no difference, they are the same

1.WarmUp questions 2.How It’s Made 3.Timeline 4.Movie

 Invertebrates evolve in the “Cambrian Explosion”  530 m.y.a.  Supercontinent Rodinia broke apart which formed new environment in the shallow seas  The animals were the first to evolve hard parts such as shells (mollusks  clams & snails)  Arthropods evolved, had an external skeleton made of chitin  Many of these fossils found in the Burgess shale in the Canadian Rockies

 Vertebrates like jawless fish evolve  470 million years ago  Had a bony, external covering  Plate movements pushed Gondwana south  South America, Africa, Australia, Antarctica, and parts of Asia made up Gondwana  The first land-dwelling plants evolved  Ended with a mass extinction (ice age)

 Time of reef building & continued evolution of fishes and the seas  Small plants, similar to mosses spread over wet, lowland areas  Vascular plants evolved  Arthropods began to adapt to life on land

 Map of Earth during this time would show 2 large continents  Gondwana occupied large part of southern hemisphere  Continental landmasses collided to form a new large continent, Laurasia ▪ Included what is now North America, Europe, parts of Asia

 Many new types of jawed fishes evolved  had bony skeletons like present day fish  Reefs formed by sponges and new types of corals continued to form in tropical seas  Amphibians evolved from fishes  The first forests developed  Devonian forest  made up of large clubmosses, tree ferns, and twig-like plants (horsetails)  Two mass extinctions struck Earth at the end of Devonian Period