” Early Life takes hold

” Early Life takes hold”

The purpose of this assignment is to allow students to “travel back in” rel=”nofollow”>in time” with the latest in” rel=”nofollow”>in technology…. to seek scientific answers to questions about early life on earth. To boldly go where no one has ever gone before…(ok just kiddin” rel=”nofollow”>ing on that last part!!) Total: 50 poin” rel=”nofollow”>ints
Research and briefly address the followin” rel=”nofollow”>ing questions: (10 poin” rel=”nofollow”>ints)
1. How would you defin” rel=”nofollow”>ine “Life” in” rel=”nofollow”>in other words, what are the characteristics of livin” rel=”nofollow”>ing organisms?
2. Why might it be valuable to study early life?

What was early earth like 4 billion years ago? (3:15)
1) What color was the sky and the ocean?
2) What gases were present in” rel=”nofollow”>in the atmosphere?
3) Was oxygen present?
4) What was the sun like?
5) What was the heavy bombardment?
2. Hostile earth and Cave Research : (5:00)
1) Why did researchers Penne Boston and Donnie Northup travel to these remote caves? (5:20) ( What was the question the researchers were askin” rel=”nofollow”>ing?)
2) Why did the researchers wear gas masks durin” rel=”nofollow”>ing their exploration of the cave?
3) What are “Snottites”
4) what do they use to grow (what is their energy source)?
5) Why was the discovery of these Snottites significant?
3. Carbon and the clues it leaves behin” rel=”nofollow”>ind: (time 13:20)
1) What in” rel=”nofollow”>ingredients are necessary for life?(what four elements) (13:40)
2) Why is carbon the” star of the show?
3) Briefly describe the Stanley Miller experiment of the 1950s (14:45)
4) Why is there controversy over Miller’s experiment today?
5) Accordin” rel=”nofollow”>ing to the film, when is it hypothesized that life began?
4. Ancient rocks :
1) What clues, regardin” rel=”nofollow”>ing early life, did Steven Mojsis. fin” rel=”nofollow”>ind in” rel=”nofollow”>in ancient rocks?
2) Where did he fin” rel=”nofollow”>ind these rocks?
5. Space Dust: (21:35)
1) Don Browin” rel=”nofollow”>ing’s Assumption: all buildin” rel=”nofollow”>ing blocks for life were destroyed when a rocky sphere the size of mars collided with earth …….if that assumption were true then he believes buildin” rel=”nofollow”>ing blocks of life must have come from where?
2) How old is asteroid dust?
3) Did Space dust contain” rel=”nofollow”>in any buildin” rel=”nofollow”>ing blocks of life?

6. Fallin” rel=”nofollow”>ing Meteors: (23:00)
1) What was found in” rel=”nofollow”>in the1960 meteorite that fell in” rel=”nofollow”>in Australia and why is this significant?
2) What was the question Jennifer Blank was askin” rel=”nofollow”>ing in” rel=”nofollow”>in her research? (26:00)
3) Describe Dr. Blank’s experiment .
4) What speed did she shoot her “bullet” at?
5) What were her results?

7. The leap to DNA:
“But the leap with DNA? It is still staggerin” rel=”nofollow”>ingly complex. No one knows how it started or what course it took” Accordin” rel=”nofollow”>ing to the documentary, have we yet created life in” rel=”nofollow”>in the lab from non-life?
8. To take hold, perhaps life needed a safe haven: Deep within” rel=”nofollow”>in the earth (31:50)
“If life could survive an impact, could it survive impacts from other meteors? ”
1) Describe the temperature , pressure and light deep within” rel=”nofollow”>in the earth’s surface
2) What are these microbes eatin” rel=”nofollow”>ing?
3) How often do these microbes reproduce?
9. The Ocean: (36:00)
1) What have marin” rel=”nofollow”>ine biologists discovered on the ocean floor that allows for warm temperatures?
2) What gas were these ocean microbes livin” rel=”nofollow”>ing off of?
10. Earth’s surface (38:00)
1) What was available for early life on the earth’s surface that was not available in” rel=”nofollow”>in the other areas explored ?
2) What source of energy was available at the earth’s surface?
3) What organelle does photosynthesis take place in” rel=”nofollow”>in?
4) What are stromatolites and where do they grow? 39:00
5) Oxygen is absorbed in” rel=”nofollow”>into the ocean and forms what?
6) What else does Oxygen do besides provide a way for us to break down sugar?

11. Fin” rel=”nofollow”>inal Thought question: Based on your viewin” rel=”nofollow”>ing of this documentary on early life, (and perhaps knowledge you have gathered from other sources) what are your fin” rel=”nofollow”>inal thoughts regardin” rel=”nofollow”>ing “how we know what we know” about early Life? (3 poin” rel=”nofollow”>ints)

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