science quiz 3/17/17

the gradual change in a species over time

evolution

relationship during evolution

evolutionary relationship

the remains of an organisms that had been preserved for a long time

preserved remains

the theory that species evolve in short periods of rapid change

punctured equilibrium

a way to see how old a fossil by the # of a radioactive element it has

radioactive dating

an unstable element that breaks down into a different element

radioactive element

a way to see how old which one of two fossils is

relative dating

groups of organisms that are physically similar

species

any difference between individuals of the same species

variation

a behavior/physical characteristic that allows an organism to survive/reproduce in its environment

adaptation

a type of fossil that forms when a mold becomes filled in w/ minerals that then harden

cast

the millions of fossils scientists have discovered

fossil record

the theory that evolution occurs slowly, but steadily

gradualism

the time it takes 1/2 of the atoms in a radioactive element to decay

half-life

a type of fossil formed when a shell or other hard part of an organism dissolved leaving an empty space in the shape of a part

mold

the process when individuals that are better adapted to their environment are more likely to survive/reproduce than others of the same species

natural selection

a fossil formed when minerals replace all or part of an organism

petrified fossil