EH Investigation 4 Question Preview (ID: 47571)

a) Cenozoic

b) Mesozoic

c) Paleozoic

d) Precambrian

a) 4.6 billion years

b) 4.6 million years

c) 3 billion years

d) 3 million years

a) Eon, era, period, epoch

b) Era, eon, period, epoch

c) Epoch, period, era, eaon

d) Period, epoch, era, eon

a) They provide evidence of organisms.

b) They form in many different ways that interest scientists.

c) Because they're curious to see past life on Earth.

d) They add to our knowledge of the history of life on Earth

a) Animals get dead and buried and become fossils.

b) A body, or trace, gets left behind. Sediments cover the body or trace and over time become rock, leaving behind an imprint.

c) Sediments cover living organisms and their homes, eventually becoming rock and leaving fossils.

d) Fossils are natures way of letting us know what used to be present on land.

a) They all get eaten and can't leave anything behind.

b) Sediments stop getting made on Earth until the organism has decomposed.

c) They can decompose or be eaten instead of leaving parts behind to be preserved in rock.

d) They are soft and get eaten before fossilizing.

a) sedimentary rocks

b) igneous rocks

c) metamorphic rocks

d) All of these options

a) A fossil that can be used to help date sedimentary rock layers.

b) A fossil that is found across the United States.

c) A fossil that is a fully complete organism.

d) A fossil that is very clear to identify.

a) wide geographic range, existed briefly, been abundant, be easy to identify

b) wide geographic range, specific size, live only in one place

c) fossils, sedimentary rock, rock colored

d) be able to tell scientists when they formed, be full body, be found with offspring

a) Organisms found as fossils change over time, fossils can be used to date rock layers

b) Organisms found as fossils are always identical, fossils cannot be used to date rock layers

c) Fossils change over time, no two fossils are alike.

d) Fossils can only be used for dating rock layers.