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Geologic Time

Total questions: 35

Worksheet time: 35mins

Name
Class
Date
1.

The earth is ______________of years old

a)

Hundreds

b)

Millions

c)

Billions

d)

Trillions

2.

Mammals are a dominant group in which era?

a)

Cenozoic

b)

Mesozoic

c)

Paleozoic

d)

Cambrianozoic

3.

What era did the formation of the earth occur?

a)

Paleozoic

b)

Precambrian

c)

Cenozoic

d)

Cambrian

4.

How old do Paleontologists believe the Earth is?

a)

2019 years old

b)

3.6 billion years old

c)

4.6 billion years old

d)

4.6 million years old

5.

What type of event usually marks the end of an Era

a)

A Mass Extinction

b)

A Quinceanera

c)

An earthquake

d)

A Volcanic Eruption

6.

What are the four eras in order from OLDEST to NEWEST?

a)

Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic

b)

Pre-Cambrian, Mesozoic, Paleozoic, Cenozoic

c)

Cenozoic, Mesozoic, Paleozoic, Pre-Cambrian

d)

Mesozoic, Pre-Cambrian, Cenozoic, Paleozoic

7.

What era did trilobites, fishes, and other marine organisms dominate?

a)

Precambrian

b)

Paleozoic

c)

Mesozoic

d)

Cenozoic

8.

Which era is the most recent, the one that we are currently in?

a)

Mesozoic

b)

Paleozoic

c)

Cenozoic

d)

Precambrian

9.

The dinosaurs and reptiles were dominant in which Era?

a)

Precambrian

b)

Mesozoic

c)

Paleozoic

d)

Cenozoic

10.

90% of Earth’s history occurred during which era?

a)

Precambrian

b)

Paleozoic

c)

Mesozoic

d)

Cenozoic

11.
What does each layer of rock represent?
a)
a period of time
b)
a different type of stone
c)
an intrusion
d)
a fault
12.
What is the law that states why F is younger than G?
a)
law of uniformitarianism
b)
law of superposition
c)
law of cross-cutting
d)
law of Memorial Jags
13.
Absolute age is determined by...
a)
the other rocks around it
b)
the law of superposition
c)
radiometric dating
14.
Absolute age...
a)
gives a number
b)
compares age (older/younger)
15.
If a picture has NUMBERS, it is an example of ...
a)
relative dating
b)
absolute dating
16.
In the history of the earth, when were humans introduced?
a)
at the beginning of the earth
b)
in about the middle of the earth
c)
relatively recently
17.

geologic time intervals that eras are divided into.

a)

geologic time scale

b)

era

c)

period

d)

epoch

18.

a model scientists use to describe the timing of events and the relationships between those events in earth’s history.

a)

geologic time scale

b)

era

c)

period

d)

epoch

19.

looks at where the fossil is located to determine its age relative to other fossils.

a)

Relative Dating

b)

Absolute Dating

20.

Analyze the layers of undisturbed sedimentary rock. Which layer of sedimentary rock is oldest?

a)

Q

b)

R

c)

S

d)

T

e)

U

21.
The Law of Superposition helps scientists to determine what?
a)
The absolute age of rock layers
b)
The age of fossils
c)
The relative age of rock layers
d)
the super powers of rocks
22.
The Geologic Time Scale is a record of what?
a)
old geologists
b)
sweet geology music
c)
the known history of rocks and fossils
d)
a list of every living thing ever
23.
Relative dating of rock layers tells us that the deeper we dig, _______.
a)
the younger the rocks get
b)
the smellier the rocks get
c)
the harder the rocks get
d)
the older the rocks get
24.
According to the law of superposition, which layer is the youngest?
a)
A
b)
B
c)
C
25.
Looking at the diagram, which layer is the oldest?
a)
dolomite
b)
limestone
c)
basalt
d)
beach sand
26.

Which era ended with the K-T/KPG extinction, probably due to an asteroid?

a)

Paleozoic

b)

Phanerozoic

c)

Cenozoic

d)

Mesozoic

27.

When did the Cambrian Explosion happen

a)

About 543mya

b)

2.5mya

c)

3.8mya

d)

490mya

28.
What is the definition of Extinct ?
a)
Fossils of widely distributed organisms that lived during only one short period.
b)
The age of a rock given as the number of years since the rock formed
c)
Fossils of widely distributed organisms that lived during only one short period.
d)
A type of organisms that no longer exists anywhere on Earth
29.
What is the definition of Index Fossil ?
a)
The age of a rock compared to the ages of rock layers
b)
Fossils of widely distributed organisms that lived during only one short period.
c)
A record of the geologic events and life forms in Earth’s history
d)
The geologic principle that states in horizontal layers of sedimentary rock, each layer is older than the layer above it and young than the layer below it
30.
What is the definition of The Law of Superposition ?
a)
The breakdown of a radioactive element, releasing particles and energy
b)
The geologic principle that states in horizontal layers of sedimentary rock, each layer is older than the layer above it and young than the layer below it
c)
A scientists who studies fossils to learn about organisms that lived long ago
d)
A fossil formed when an organism buried in sediment dissolves, leaving a hollow area
31.
A unit of geologic time that subdivides eras
a)
period
b)
time span
32.
_______________ is the long span of time that begins geologic time.
a)
Precambrian Time
b)
Cenozoic Time
33.

In which time period are we currently living?

a)

Precambrian Time

b)

Paleozoic Era

c)

Mesozoic Era

d)

Cenozoic Era

34.

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

a)

Preserved fossils

b)

Index fossils

c)

Imprints

d)

Radioactive dating

35.

Use relative age dating to put the rock layers in correct order from oldest to youngest.

a)

B, D, A, E, C

b)

C, E, D, A, B

c)

A, C, E, D, B

d)

C, E, D, B, A

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