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Mr. Dzmura Test
Terms in this set (46)
How do we know there was little or no oxygen in the early earths atmosphere?
The oldest existing rocks show no evidence of iron oxidation (rust)
How would oxygen have prevented the formation of life in early earths atmosphere?
Oxygen would have reacted and destroyed compounds as fast as they formed.
In what state of matter was water on early earth? Why?
Water would evaporate because of heat on earth, but as earth cooled and rocks formed, water formed into seas.
What gases did Miller and Urey add to their experiment?
CH4, NH3, H2O, H2
What form of energy did Miller-Urey use?
Name all major energy sources in earths early atmosphere.
Lightning, volcanic activity, ultraviolet radiation.
What was produced by the Miller-Urey experiment?
Why was the Miller-Urey experiment important?
The experiment showed that organic molecules could be made in early life.
What formed within a week in the simulated hydrothermal vent conditions?
If not a hydrothermal vents, how else could monomers of organic molecules have appeared on earth?
Interstellar clouds of dust, ice, and gases by meteorites.
Which line from the last sub section of 18.4 is most related to the first three seconds of the video clip we watch from Cosmo's?
What is the geosphere?
The crust and upper mantle of the earth.
What is the hydrosphere?
The water on the earths surface.
What is the biosphere?
The area of the planet where organisms live.
What is the atmosphere?
A layer of gases surrounding the earth or another planet.
What are all the factors we learned about which most directly changed early earth from an inhospitable planet to a planet with life?
How does polymerization occur?
When monomers are built up and created created into polymers ????
How does depolymerization occur?
When polymers are decomposed into monomers?
When did water arrive on earth according to the article (9/18)
What is one reason why silicone is not the element of the backbone of life and carbon is.
Silicone oxidized to a solid so it cannot support life while carbon oxidizes to carbon dioxide.
When did atmospheric oxygen levels reach their maximum and what was that level?
300 million years ago, 35% of volume.
What were the first forms of life on earth?
Stromatolites perform a process called _________ which produces __________ and an important gas called ________
Photosynthesis, glucose, oxygen
750 million years ago, volcanoes pumped this gas into the atmosphere.
Carbon dioxide in the atmosphere traps:
750 million years ago the rocks absorbed much of carbon dioxide in the atmosphere so that he could not be trapped. This was called:
Life first appeared on earth ______ years ago
How long ago was the Earth formed?
What state of matter was the very early earth?
What event occurred that formed the moon?
A creation ( Earth collided with another planet.)
How did water arrive on earth?
Meteorites attacked and brought water.
Other than water, minerals, and carbon, what did meteorites bring to the earth 3.8 billion years ago that helped form life?
Meteorites rained down 3.9 bya for 20 million years carrying this important compound:
___________ helped the Earth begin to ___________ enough to form tectonic __________.
Water, Cool, Plates
The meteorites also carried small organic molecules such as:
What energy was available during early Earth to form small molecules into large molecules?____________________
What inorganic molecules were present on early Earth that allowed larger organic molecules to be assembled? (Used in Miller Urey experiment)
CH4, NH3, H2O, H2
Inorganic Molecules (where in flow chart and what about them)
(1) , self-assemble on Earth and space.
Organic Monomers (where in flow chart and what about them)
(2) , Self assemble in aquatic environments on Earth.
Organic Polymers (where in flow chart and what about them)
(3) Interact in early metabolism, Self assemble as vesicles, Become the first genome.
What is a monomer?
A sub unit/ building block of a polymer.
What is a polymer?
A large molecule/macromolecule made up of the same monomers.
Monomer/Polymer of Carbs
Monomer/Polymer of Lipids
Glycerol and Fatty acids, Trigylceride
Monomer/Polymer of Protein
Amino Acids, Polypeptide
Monomer/Polymer of Nucleic Acids
Nucleotide, Nucleic Acids