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8 Cards in this Set

  • Front
  • Back
Biological evolution
change over time in population of related organisms.
cast
fossil copy of an organism in a rock
extinction
when all individuals of an species have died
geologic time scale
chart that divides Earths history into different numbers of neutrons.
isotopes
atoms of the same element that have different numbers of neutrons.
mold
impression of an organism In a rock
tissue
similar cells that work together and perform a function.
trace fossil
preserved evidence of the activity of an organism.