rock and fossil Flashcards
uniformitarianism
this is a theory that shows how earths crust changed
catastrophism
a theory of how earths crust changed
paleontology
the study of fossils
relative dating
the science in relative order
absolute dating
the science in determing age of things
superposition
a
isotope
two or more form of the same element
radioactive decay
decaying from radioactive waste
half life
the time it takes for radioactive waste to get to get to half the danger
fossil
bones or remains of animals
trace fossil
a footprint
mold
bacteria on food
cast
a mold of a thing
unconformity
a surface of contact between two groups of unconformable strata.
mass extinction
almost everthing getting wiped out
Jurassic period
a time period with the dinosores
Cretaceous period
time period
Devonian period
time period
Quaternary period
time period
Permian period
time period
