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ogt vocab
vocabulary #1
20
Biology
10th Grade
08/29/2007

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Term
aa
Definition
a stiff slow moving bawlsatic magma that flows at a lower temperature
Term
abiotic factors
Definition
nonliving parts of an ecosystem
Term
absolute age
Definition
the age in years of an object


MATT I SEE YOU
Term
absolute zero
Definition
a temp below which a substance has now kenetic enegy
Term
acceleration
Definition
a rate of change in velocity with time
Term
accilmation
Definition
an adjustment by an organism to an abiotic factor
Term
acid
Definition
a substance with a pH less than 7 that produces hydronium ions in water
Term
acid rain
Definition
precipitaion with a pH below 5.6
Term
activator
Definition
a gene that enables transpons to change location on a chromosome
Term
active transport
Definition
the movement of a substance across the cell membrane from high to low energy
Term
adaptation
Definition
an inherited trait that helps improve the ability to survive in an enviroment
Term
adaptive radiation
Definition
an evolutionary pattern which a single ancestral species evoloves into many species
Term
aerobic respiration
Definition
final electron acceptor that makes atp when breaking down organic molecules
Term
age structure
Definition
the distrubution of organism amoung various ages in population
Term
air drag
Definition
the resistance of air particals against falling object
Term
alleles
Definition
the various form of a gene
Term
allele frequency
Definition
the percentage of a gene pool made up by an allele
Term
alloy
Definition
different forms of metal
Term
alpha decay
Definition
the decay of an element by the emission of an alpha particle
Term
alpha radiation
Definition
streams of helium nuclei
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