PPT-Early Earth

earliest phase of Earth heating first seas thin atmosphere of H CO 2 H 2 O N 2 CO NH 3 CH 4 early bombardment Early Bombardment 2 phases Relative dating. Early Life on earth. The evidence for the earliest life is highly controversial and still debated. Much of the debate surrounds the oldest . fossils.. The timespan that considers the biological and geological context for the emergence of life on the Earth includes the . Chemical conditions of the early Earth. . A model for the first cells. First life. Life changes the planet: oxygenating Earth’s oceans and atmosphere. Eukaryotic cells descended from prokaryotic cells. Ch 27. Questions??. What are some theories about how our solar system began?. The Nebular Hypothesis. solar nebular. a rotating cloud of gas and dust from which the sun and planets formed. In 1796, French mathematician . Geochronometry. Isotope tracing. History . of “primordial” . Pb. Meteorite samples . Chondrite. – a primitive, undifferentiated meteorite. CI refers to a particular class of carbonaceous . chondrite. Creation. Creation of man. The Fall. The Flood. The Tower of Babel. Genesis 1-11. The story of the lives of four men. Genesis 12-50. The purpose of the Bible. To explain God’s attempt to establish His kingdom on earth.. Chapter . 5. Meteorites. Primitive. Chondrites (stones). Ordinary Chondrites (H, L, LL). Enstatite Chondrites (EH, EL). Carbonaceous Chondrites (CI, CV, CM, CO, . etc. ). Misc. rarer classes. Further subdivided by ‘petrologic grade’. Solar System. Nebular Hypothesis. Nebular Hypothesis: Solar System was produced by the gravitational collapse of a gas cloud – the remnant of a supernova . explosion.. Concentration of heavy elements in inner . Marc Hirschmann. University of Minnesota. CIDER Summer Program 2012. “DEEP TIME”. “How did early Earth become our modern world?”. July 1 – August 10. Tutorial/Workshop July 15-August 10. Application Deadline February 1. Midterm 2. Preparation/Review. Style of Questions. Matching term w/ definition. Short definition of concepts/processes. Name some of multiple characteristics. 25% of points from Part II Quizzes. REVIEW . How old is the earth?. How old is our earth?. Aristotle thought the Earth had existed eternally.. Early Romans believed its formation was relatively recent due to no records before the Trojan War.. 1640 – Ussher calculated Earth was created in . NOT THE SAME AS EVOLUTION. First life. 3.6 Billion years ago. First life was likely simple. Bacteria-like. Single-celled, no organelles. Early Earth. Early Earth had . NO OXYGEN. Atmosphere had CO2, Carbon monoxide, nitrogen, water, hydrogen. Conditions on early Earth made the Origin of Life possible.. Current theory about how life on Earth began.. Earth formed about 4.6 billion years ago.. Earth was too hot and still being bombarded by meteors, any water evaporated.. Non-living synthesis of simple . organic. molecules. All of the elements found in organic compounds are thought to have existed on Earth and in the rest of the solar system when the Earth formed. . But . (10) Catalyst . (20) GN: Origins of Life. (15) GP: Early Earth. (45) The History of Earth. I can:. explain how life has changed since early Earth. Catalyst. What are the 3 ways that speciation can occur?.