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OGT list 1 words- Mars
quiz vocab words
20
Science
10th Grade
09/01/2011

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Cards

Term

 abiotic factors 

Definition
nonliving parts of an ecosystem
Term

aa

Definition
 a stiff slow moving balsatic magma that flows at a lower temperature
Term

 absolute age

Definition
 the age in years of an object
Term

absolute zero 

Definition
 a temperature below which a substance has no kinetic energy
Term

acceleration 

Definition
a rate of change in velocity with time
Term

acclimation

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
precipitation with a pH below 5.6
Term

 activator 

Definition
 a gene that enables transposons to change location on a chromosome
Term

active transport 

Definition
the movement of substance across the cell membrane from high concentration to low concentration with energy
Term

adaptation 

Definition
 an inherited trait that improves an organism’s ability to survive in an environment
Term

  adaptive radiation 

Definition
 an evolutionary pattern by which a single ancestral species evolves into many species
Term

 

aerobic respiration

 

 

Definition
a cellular process using oxygen as a final electron acceptor that makes ATP when breaking down organic molecules
Term

age structure

Definition
the distribution of organisms among various ages in a population
Term

 air drag 

Definition
the resistance of air particles against a falling object
Term

alleles

Definition
the various forms of a gene
Term

 allele frequency 

Definition
the percentage of a gene pool made up by an allele
Term

alloy 

Definition
a solid solution of different metals, sometimes includes nonmetals
Term

alpha decay 

Definition
the decay of an element by the emission of alpha particles
Term

 

alpha radiation

Definition
streams of helium nuclei
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