Geologic History U3A

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

• animals

• plants

• plants and animals

• neither plants nor animals

Trace fossils are recognized as evidence of which pre-existing life?

• animals

• plants

• plants and animals

• neither plants nor animals

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

• deposition

• faulting

• folding

• erosion

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

• faulting

• deposition

• folding

• erosion

What causes the youngest layers to be on top?

• sedimentation

• faulting

• folding

• erosion

What can be used to determine the relative age of two rocks?

• the presence of unconformities

• vertical position

• radioactive dating of each layer

• relative age cannot be determined

Which factor is the most accurate in determining the absolute age of two rocks?

• vertical position

• the presence of unconformities

• radioactive dating of each layer

• comparing fossils in the layers

Which example is classified as a body fossil?

• footprint of a stone-age individual

• a worm trail

• ancient shark vertebra

• fossilized bird droppings

Which example is a body fossil?

• shrimp burrow

   

• dinosaur footprint

• wooly mammoth tusk

• fossilized animal droppings

Which example is a trace fossil? Select two.

• dinosaur footprint

• shrimp burrow

• dinosaur egg

• shark tooth