Vocabulary/2nd 9 Weeks/Science

Front

cast

Back

a solid copy of an organism

Front

mold

Back

an impression of an organism

Front

Alfred Wegener

Back

He developed the theory of Continental Drift.

Front

trace fossils

Back

preserved evidence of the activity of ancient organisms: These do not contain the animal fossil itself

Front

paleontologists

Back

Scientists that study fossils and use that information to determine what past organisms were like.

Front

absolute dating

Back

Used by geologists to determine the absolute age of igneous rocks.

Front

petrified

Back

turned to stone

Front

fossils

Back

The preserved remains or traces of living things, such as plants and animals.

Front

unconformities

Back

gaps in the geologic record because rock layers have been lost due to erosion

Front

faults

Back

cracks or breaks that cut through layers of rock