test Flashcards
how does geologic change happen in unifomintarianism
gradual
catastrophic event
astroid
palentologists study
history of plants and animals
paleobotantists
study fossilized plants
preserved foot prints
trace fossil
amber
harden tree sap
which temp slows down organism decay
freezing
which era has the most mass extinction
paleozoic
which era mammals live in
maleozoic
trace fossil
mark left by dinosaur tracks
Years of Earth?
4.6 billion
what scientists think caused dinosaurs to extinct?
climate change
how scientists use geologic time scale
divide earths history
what trace fossil tell about animals that left them
how big they were
what most fossils are in
sediment
what scientist know about underbeds
younger top older bottom
eon rocks were most formed in
archean
what not learned by studying fossils
pull of gravity has changed
process of relative dating dont mean
same age of rock layers next to it
largest division of geologic time
eon
