UNIT TEST REVIEW PALEOBIOSPHERE

UNIT TEST REVIEW PALEOBIOSPHERE

Geologic Time Periods Overview

Multiple Select

the three eras in the Phanerozoic are

• Paleozoic

• Cenozoic

• Mesozoic

• Proterozoic

Multiple Choice

the geologic time line spans how many years

• 4.56 billion years

• 400 million years ago

• 3 million years ago

• 2000 years ago

Multiple Choice

List the time periods largest to smallest

• eras, eons, periods, epoch

• epoch, eras, eons, periods

• eons, eras, periods, epochs

• epochs, periods, eras, eons

Multiple Choice

It is not part of the precambrian time

• Archaen eon

• Hadean eon

• phanerozoic eon

• protorezoic eon

Multiple Choice

The first mass extinction occurred at the end of the Precambrian time.

• True

• False

Multiple Choice

Which eon has the extinction of dinosaurs?

• Phanerozoic

• Proterozoic

• Archean

• Hadean

Multiple Choice

Humans evolved in what eon?

• Hadean

• Archean

• Phanerozoic

• Proterozoic

Multiple Choice

The asteroid theory is backed up by a layer of this in the fossil record

• clay

• iridium

• indigo

• no fossils at all

Multiple Choice

there have been ___ mass extinctions in history

• 3

• 4

• 5

• 2

Multiple Choice

this time period saw the reptiles, scale trees, and seed ferns

• Silurian

• Devonian

• Carboniferous

• Permian

Multiple Choice

the first fishes come out in this era

• cenozoic

• mesozoic

• paleozoic

• pre-cambrian

Relative Dating

Multiple Choice

What are the relative ages of the features in order from oldest to youngest?

• Limestone, Basalt, Fault, Siltstone
• Siltstone, Fault, Basalt, Limestone
• Limestone, Fault, Basalt, Siltstone
• Limestone, Siltstone, Fault, Basalt

Multiple Choice

Which one of the units are Eons?

• Archean

• Triassic

• Cenozoic

• Cambrian

Multiple Choice

Which one of the units are Eons?

• Hadean

• Mesozoic

• Jurassic

• Cambrian

Multiple Choice

Epochs are subdivided into....

• Eons

• Eras

• Periods

• nothing, its the smallest unit...

Multiple Choice

Periods are subdivided into....

• Eons

• Eras

• Epochs

• nothing, its the smallest unit...

Multiple Choice

What type of rock forms fossils?

• Intrusive Igneous

• Extrusive Igneous

• Sedimentary

• Metamorphic

Multiple Choice

By saying "my dad is 48 and I am 13", it would be...

• relative dating (time)

• absolute dating (time)

• law of superposition

Multiple Choice

Which rock layer in the diagram seems to be the oldest?

• F

• B

• E

• A

Multiple Choice

Why isn't the uranium method of dating a good fit for an old animal bone?

• Living things don't have uranium in them

• Uranium breaks down too quickly to be used for dating

• Carbon reacts with uranium

• Uranium dating is a good fit for an old animal bone

Multiple Choice

You start with 10 grams of a radioactive material. After 10 days, you test it and find that you have 2.5 grams left. How long is the half-life?

• 10 days.

• 5 days.

• 3.3 days.

• It's impossible to tell.

Multiple Choice

Carbon-14 is found in once-living organisms and has a half-life of about 5,700 years. Uranium-238 is found in some kinds of rocks and has a half-life of about 4.5 billion years. What would be the best way to find the age of a very old rock formation?

• Carbon dating

• Uranium dating

• Neither would work

• Both would work

Multiple Choice

Over time, what happens to the amount of parent isotope?

• It increases.

• It decreases.

• It stays the same.

• It goes up and down.

Multiple Choice

What is the definition of a half-life?

• The time it takes for a radioactive isotope to decay completely

• Half of the time it takes for a radioactive isotope to decay completely

• The time it takes for half of the radioactive material in a sample to decay

• Half of the life of the Earth

Multiple Choice

Based on this graph, about how long is the half-life for Mercury-203?

• 400 days

• 250 days

• 150 days

• 50 days

Multiple Choice

Based on the graph, how much of a substance is left after 2 half-lives?

• 50%

• 25%

• 12.5%

• 6.25%

Multiple Choice

Which layer is OLDER? Intrusion M or Layer D?

• Intrusion M

• Layer D

Multiple Choice

Which layer is OLDER? Layer E or Fault H?

• Layer E

• Fault H

Multiple Choice

Which layer is OLDER? Layer E or Intrusion A?

• Layer E

• Intrusion A

Multiple Choice

Which layer is OLDER? Layer M or Intrusion P?

• Layer M

• Intrusion P

Multiple Choice

Trilobites came before dinosaurs because they were found in a lower rock layer

• absolute dating

• relative dating

Multiple Choice

Put the layers in order from oldest to youngest.

• a, b, c, d, e
• b, c, d, a, e
• b, c, d, e, a 
• e, d, c, b, a

Multiple Choice

Which of the following orders the rock layers accurately from oldest to youngest?

• A, B, C, D, E, F, G, H
• B, F, G, C, D, H, A, E
• B, G, C, D, E, H, A, F
• F, A, H, E, D, C, G, B

Multiple Choice

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Multiple Choice

Which layer is oldest?

• A
• W
• G
• Z

Multiple Choice

_____________ are the trace or remains of an organism that lived long ago.

• climate

• Fossils

• Ice core

• Trace fossil

• Uniformitarianism

Multiple Choice

The Principle of ______ states that geologic processes that happened in the past can be explained by current geologic processes.

• climate

• fossil

• ice core

• trace fossil

• Uniformitarianism

Multiple Choice

Finding the age of a rock based on comparing the amounts of unstable, radioactive particles to stable particles in a sample is called:

• radiometric dating

• relative dating

Multiple Choice

How old do Paleontologists believe the Earth is?

• 2019 years old

• 3.6 billion years old

• 4.6 billion years old

• 4.6 million years old

Multiple Choice

What era did the formation of the earth occur?

• Paleozoic

• Precambrian

• Cenozoic

• Cambrian

Multiple Choice

Mammals are a dominant group in which era?

• Cenozoic

• Mesozoic

• Paleozoic

• Cambrianozoic

Multiple Choice

The % of the parent isotope remaining after 1 Half Life.

• 50%

• 25%

• 12.5%

• 6.25%

Multiple Choice

A bone was that originally had 10 grams of Carbon 14 now has about 1.25 grams.  How many YEARS have passed? (not half lives)

• 3
• 5730
• 6000
• 17,200

Multiple Choice

The % of the parent isotope remaining after 2 Half Lives.

• 50%

• 25%

• 12.5%

• 6.25%

Multiple Choice

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?

• 25 years
• 200 years
• 400 years
• 800 years