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29 Cards in this Set
- Front
- Back
The Big Bang is
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the theorized beginning of the universe from a single point
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A protostar is
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the theorized beginning of a star caused by gases accumulating and condensing into a dense core
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Scientist theorize that heavy elements formed
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when light atoms within stars fused, becoming heavier atoms
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In a satrs theorized life cycle , a supernova occurs when
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the star consumes all the hydrogen fueling it
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It's theorized that the solar system
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resuted when a supernova shock wave caused a nebula to condense and spin
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The planets were formed, according to theory,
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when some condensing gas revolving around the sun collapsed
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Scientists theorize that stars formed
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when protostars beacme so dense that nclear fusion began in their cores
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The nebular theory is the theory that
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the solar system formed from a nebula.
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According to neblar theory,Earth and other planets formed due to a process called
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accretion
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The process by which matter became layered according to density during Earth's formation, with heavier matter near the core and lighter material closer to the crust , is called
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density stratification
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The more accepted theoryof the moon's origin is
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that a planet-sized object struck young earth, sending material into orbit that eventually became the moon.
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It is theorized that the atmosphere formed
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only after Earth cooled enogh for water to accumulate on the surface.
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It is theorized that the oceans formed
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only after Earth cooled enough for water to acmlate on the srface.
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Scientists theorize that the formation of the oceans
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created the atmospheric changes required for terrestrial life to form.
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The most compelling evidence that supports the theory that life began in the oceans is
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based on how scientists interpret the fossil record.
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According to theory, the first molecular building blocks of life
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are readily formed under certain conditions by natural processes.
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Scientists theorize that nonliving chemicals became life when
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a large, stable molecle formed by chance and became capable of reproducing itself.
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Abiogenesis is
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the origin of life from nonliving matter.
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A(n) ___________ is an organism taht relies on consuming chemical componds. A(n) ___________ is an organism that can create organic chemical componds from inorganic compounds and an external energy source.
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heteotroph, autotroph
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True or False:
Oxygen is important to life because it allows organisms to use chemical energy more efficiently. |
True
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The theory of eveolution says that modern organisms and their characteristics arose through the processes of __________ and ___________
over millions of years. |
mutation, natural selection
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True or False:
Scientists may classify marine enviroments based on a wide range of physical characteristics, or a combinatiopn of physical characteristics |
True
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The ________ zone refers to water portion iof the ocean . The ________ zone refrers to the bottom.
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pelagic, benthic
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The zone between the low-tide mark and the edge of the continental shelfis the
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neritic zone.
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The zone of deep water in the open ocean is the
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bathypelagic zone
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Shore bottom that is splashed but not submerged is the _________ zone of the benthic zone.
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supralittoral
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The marine lifestyle that consists of organisms that swim is called
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nekton
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The neston are organisms that _________. They're a subgroup of the_________.
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float, plankton
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_________ refer(s) to organisms that live on the sea bottom. ___________ are those organisms that live buried or partially buried in the sea bottom.
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Epifauna and epiflora, infana
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