11/10/10 – “F” DayObjective: To understand how life evolved from coacervates to complex multicellular creatures.
Do Now: What molecules were necessary for life to exist?
Today:Complete Geologic Timeline ActivityEarly Earth and Evolution Notes
HW – Webquest to be completed by Monday, working at library later this week!
11/12/10 – “B” DayObjective: To understand how life evolved from coacervates to complex multi-cellular creatures.
Do Now: What were the first living organisms like?
Today:Geologic Timeline/Rock Strata DataBig Bang to Eukaryotic Cell Activity
HW – Webquest to be completed by Monday, working at library later this week!
11/15/10 – “C” DayObjective: To understand how life evolved from coacervates to complex multi-cellular creatures.
Do Now: Get out John Kyrk Evolution Questions – Any Questions?
Today:John Kyrk Evolution – HW Quiz
IRP Logbook Expectations
Early Earth Notes
Which Came First Activity
11/16/10 – “D” DayObjective: To understand how life evolved from coacervates to complex multi-cellular creatures.
Do Now: How did coacervates (cells) change over time?
Today:STATS help announcement
Finish Notes
Earth History – Evolution of Coacervates Activity
11/17/10 – “E” DayObjective: To understand how life evolved from coacervates to complex multi-cellular creatures.
Do Now: Which came first (Explain) chemical evolution or evolution of life?
Today:STATS help today after school
Origin of Life
11/18/10 – “F” DayObjective: To understand how life evolved from coacervates to complex multi-cellular creatures.
Do Now:
Today:Complete Origin of Life
Discuss/Read Margulis Article
Tomorrow:Eukaryotic vs. Prokaryotic – Microscope Inquiry Lab
11/22/10 – “B” DayObjective: To compare the structures of prokaryotic and eukaryotic cells
Do Now: What is a prokaryote? A eukaryote?
Today:Microscope Lab!
11/23/10 – “C” DayObjective: To compare the structures of prokaryotic and eukaryotic cells
Do Now: On Low power…what is thediameter of thismicrobe?
Today:Continue Microscope Lab!
“I have… You have…”
Earth (Life) History
1. The Big Bang Theory 14 Billion Years ago
• Currently accepted explanation for beginning of universe
• Based on the theory of relativity
• Cosmic Explosion (“BIG BANG”) - universe has been expanding and cooling since then
• * Supporting evidence: Cosmic background radiation
2. Cosmic dust and gas condense forming planets and stars.
• Planet Earth forms! 4.6 BYA
Gases are released from volcanoes, etc..
Atmosphere created
3. Reducing Atmosphere - held in place by gravity.
• Contains N2 (Nitrogen gas) , CO2, H2O, and maybe H2S (hydrogen sulfide), NH3 (ammonia) and CH4 (methane).
• There was no O2 or O3
• Earth Surface U.V.
4. UV radiation chemical evolution
• Warm oceans
• lots of N2, H2S, NH3 Organic Soup
energy
5. Organic Soup
• a.a., lipids, & carbs clump together in a primitive organization = COACERVATES– Predecessors to the first true cells
6. Advanced Coacervates
• Use RNA to make copies = REPRODUCTION
7. Reproduction 1st cells
• 3.5 BYA
All first cells
• Archaebacteria
• Prokaryotes - “ Before nucleus”
• Anaerobes
8. Archeabacteria - advanced
• 3-2.5 BYA
• Chemoautotrophs
• Photosynthesis by cyanobacteria
releases O2 in atmosphere
9. Oxidizing atmosphere (21% O2)
• 2.5 BYA
• many archeobacteria go extinct
• O3 UV shield
• O2 Aerobic respiration
10. Aerobic Respiration
• Efficient energy for cells
• New cell design = EUKARYOTIC CELLS
• “advanced” cells with nuclei
11. Eukaryotic cells
• 1.5 BYA
• Theory of Endosymbiosis - Big cells engulf and incorporate small cells as organelles.
• Remember Dr. Jeon’s Amoeba’s??
• Archeabacteria organelles
• Cells are now more complex and diverse.
12. Multicellular Organisms
• 0.57 BYA
• Specialization of cells