Geologic History

Front

Impressions of leaves are recognized as evidence of which pre-existing life?

Back

plants

Front

Which process is responsible for compressing successive strata in the earth?

Back

folding

Front

Why can the geologic record be analyzed by looking at different rock layers?

Back

The layers have different ages with the youngest layers on top.

Front

Which factor is the most accurate in determining the absolute age of two rocks? Options: vertical position, the presence of unconformities, radioactive dating of each layer, comparing fossils in the layers

Back

radioactive dating of each layer

Front

Which example is classified as a body fossil? Options: footprint of a stone-age individual, a worm trail, ancient shark vertebra, fossilized bird droppings

Back

ancient shark vertebra

Front

Which example is a trace fossil? Options: dinosaur footprint, dinosaur bone, dinosaur egg, shark tooth

Back

dinosaur footprint

Front

Which type of fossils are used to identify specific time periods?

Back

index fossils

Front

Which example is a trait of an index fossil?

Back

found in a limited time span

Front

Which series of words describes lengths of geologic time from shortest to longest? Options: period < era < eon, era < period < eon, eon < era < period, era < eon < period

Back

period < era < eon

Front

Which unit of geologic time is the longest?

Back

eon