Term
| most prominent types of green house gasses in the modern atmosphere are... |
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Definition
methane (ch3)
carbon dioxide (c02) |
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Term
| star formation requires... |
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Definition
the presence of a nebula (source of gas and dust)
a shock wave, which triggers the reaction |
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Term
| stars are fueled by nuclear fusion. this reaction is... |
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Definition
| the combining of hydrogen to forum helium |
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Term
| a protostar becomes a full fledged star when... |
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Definition
| the outward pressure from fusion equals the inward pull of gravity |
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Term
| on the HR diagram, a fairly luminous but fairly cool star would be located in the top right, and is called a... |
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Definition
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Term
| during the formation of a solar system, the central region of a collapsing solar nebular initially rose in temperature because of... |
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Definition
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Term
| immediately following the big bang, the most likely type of radiation present was... |
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Definition
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Term
| where is the center of the universe... |
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Definition
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Term
| which type of electromagnetic radiation has the longest wavelength? |
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Definition
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Term
| which type of electromagnetic radiation has the shortest wavelength? |
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Definition
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Term
| Additional evidence for the Big bang came from two Bell Labs engineers who observed, for the first time, cosmic microwave background radiation (CMBR). Which is true of CMBR? |
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Definition
its virtually uniform in every direction
it has a temperature of about 2.7k
it is radiation from higher energy from the big bang |
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Term
| the planets formed from... |
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Definition
the collapse of the solar nebula
a disk of material orbiting the early sun
accretion of dust particles into larger objects followed by collisions and continued growth |
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Term
| a star that is luminous but cool can exist because |
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Definition
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Term
| the gas planets are massive because |
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Definition
| it was cold enough in the outer regions for ice to condense and join with the planets |
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Term
| stars with a moderate temperature but are very small in size are called... |
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Definition
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Term
| the first stars began to from... |
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Definition
| after 380,000 years following the big bang |
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Term
| the introduction of water to the early earths surface may have originated from |
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Definition
out gassing by volcanic irruptions
impacts from comets |
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Term
| by the beginning of the Archaeon eon, the atmosphere consisted mostly of... |
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Definition
| methane (nh3, nitrogen (n2), carbon dioxide (c02) |
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Term
| the land, oceans, and modern earth would have likely been the same if life had never arose... |
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Definition
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Term
| the development of photosynthesis caused an immediate build up of o2 in the earths atmosphere |
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Definition
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Term
| the age of the earth can be determined by radiometric dating of |
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Definition
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Term
| how many half lives must pass before only 12.5% of parent isotopes remain? |
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Definition
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Term
| the process by which the earth separates material based on density is called |
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Definition
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Term
| the earth was extremely hot due to... |
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Definition
energy released by asteroid and comet impacts
radioactive decay in the earths core. |
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Term
| the Hadeon eon was most likely... |
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Definition
extremely hot
volcanically active
receiving many impacts |
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Term
| carbon can not be used to date really old rocks because |
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Definition
| its half life is too short |
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Term
| the earliest life on earth probably... |
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Definition
| thrived in an environment we would consider toxic and volatile |
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Term
| the presence of the moon is a result of.. |
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Definition
| a mars like impact with the early earth |
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Term
| the oceans were formed... |
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Definition
by moisture in the early atmosphere
as the earth cooled
from water introduced into the early atmosphere by comets and volcanoes |
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Term
| The first major photosynthesizers on Earth were |
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Definition
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Term
| Stephen J. Gould said evolution is based on two undeniable facts and one inescapable conclusion. Fact 1 is that species produce more offspring then can possible survive (based on the limits of ecosystems). Fact 2 is that offspring posess variations in heretable traits. The inescapable conclusion is |
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Definition
Within a given set of offspring, some will die and some will live
Offspring that have a heretable trait which allows them an advantage will more likely survive
Offspring that survive will be the ones that produce more offspring
Heretable traits which promote survival will persist |
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Term
| the modern earths atmosphere consists mostly of... |
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Definition
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Term
| the first life on earth was probably... |
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Definition
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Term
| bright line emitters glow because of... |
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Definition
| excited electrons in the gas |
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Term
| how far back do our big bang models go? |
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Definition
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Term
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Definition
| the total energy of a star |
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Term
| at what temperature does fusion occur... |
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Definition
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Term
| the early atmosphere consisted of mostly... |
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Definition
| carbon dioxide, ammonia, methane, and water |
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