1. Focus Lesson: Common Molecules Define using textbook when needed.

2. How will we get there? Warm Up: Cell Structure Review
Last Class
This class
Warm Up: Cell Structure Review
Pg 30: Scientific Method
Page 31: I.P. Evolution
Home Learning
Study New Vocabulary
Complete Page 31
FCIM: Common Molecules
Page 33: QUIZ 4
Page 32: SRE ENRICHMENT
Page 35: Timeline Engage and Notes: Origin of Life
Page 34: Questioning Theories
Home Learning:
Flashcards

3. Quiz 4: Theory of Evolution
There are 10 questions on this multiple choice test.
You will have approx. 20 minutes to complete it.
Read carefully. Map the question. Use testing strategies.

4. Paste your quiz on 33 complete Page 32: SRE or enrichment
Mastered this concept?
Below an 80%?
Learn from your mistakes
SRE the questions you answered incorrectly.
S: State the correct answer
R: Explain why it is correct
E: Provide support Pg#
WHY does speciation occur?
What conditions prompt this change?
Diagram this process on this page.

5. Page 35 Explore: Timeline Predict
Your group will place the slips of paper in the envelopes in order.
Start with the slip that states “first” and end with the strip that says “last.”
When your group thinks that they have the answer correct silently raise your hand.
I will check your work.
Once it is correct I will give you further instructions! 
Students will complete and glue the timeline on page 28 in their notebooks.

6. Origin of Life: Notes Page 35 under, or beside your timeline
We know what life is. we can explain how it has changed over time, But how does science propose it originated?

7. What was Earth like billions of years ago?
Violent and hot
So hot that it was likely in a molten state!
Air was made of ammonia, water vapor, methane and CO2
VERY little Oxygen
As Earth began to cool the water vapor fell to the earth creating vast oceans.

8. Organic Molecule Hypothesis

9. Miller-Urey experiment (1953)
Scientists recreated the inorganic atmosphere of early Earth
Simulated lightning to demonstrate how electrical current could create organic molecules from a mixture of gases.
Organic molecules created included amino acids. Why is this monomer so important to life?

10. REVIEW Organic Molecules must be formed before life can exist Carbon
Organic compounds contain what TWO atoms?
Carbon
Hydrogen
Organic Molecules must be formed before life can exist

11. What was the first life like?
Anaerobic organisms…why?
Single celled prokaryotes
Asexual Reproduction
Heterotrophs…why?
Why anaerobic? Aquatic environment- atmosphere had little oxygen
Hetertrophs bc of the rich organic nutrients in the “primordial soup”

12. What came next? Autotrophs…why? Endosymbiosis Multicellular organisms
The creation of the Eukaryotic cell.
Smaller free-living bacteria were enclosed within a larger cell becoming what we know today as organelles
Multicellular organisms
Sexual Reproduction--how would this influence evolution?
HUMANS
Why autotrophs? The organic nutrients in the “primordial soup” would have been extremely limited.
Endosymbiosis: allows for exchange of genetic material and increase in diversity.
may have arisen from a symbiotic association of prokaryotes (Lynn Margulis):
anerobic bacteria become mitochondria
spirochaetes become flagellum
cyanobacteria become chloroplasts
mitochrondria and chloroplasts now have their own genetic material, ribosomes, and are affected by antibiotics even wile the cell is not

13. Which ones are biotic? Abiotic?
Kind of thrown in here- but is a good review of what’s living and what’s not.

14. Page 34
In your notebook:
Compare and Contrast the Theory of the Origin of Life with the cell theory proposed by Francisco Redi? Recall that Francisco Redi disproved spontaneous generation in the 17th century.

15. Home Learning Create flashcards for any new vocabulary. #YOLO
Remember to keep an open mind when discussing theories.
It is not a fact
It is not something that has to be proven
It is one attempt to answer questions raised by observation.