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WorksheetsCh 11 Geologic Time
Total questions: 20
Worksheet time: 11mins
Name
Class
Date
1.
Longest units of geologic time
a)
epoch
b)
eon
c)
generation
d)
period
2.
Second-to-longest geologic time period. Eons are divided into these.
a)
eras
b)
eons
c)
epochs
d)
periods
3.
Eras are divided into these.
a)
hours
b)
periods
c)
eons
d)
epochs
4.
Periods are subdivided into...
a)
eras
b)
eons
c)
epochs
d)
hours
5.
All geologic time periods are equal in length
a)
true
b)
false
6.
Older rock contains more complex fossils than younger rock.
a)
true
b)
false
7.
Geologists use sudden changes in the _____________ to mark divisions in geologic time.
a)
environment
b)
fossil record
c)
life forms
d)
weather
8.
Sudden changes in the fossil record represent...
a)
mass extinction
b)
evolution of species
c)
many earthquakes
d)
flooding of earth
9.
There have been _____ mass extinction events in Earth's history.
a)
3
b)
4
c)
5
d)
2
10.
In what period did the largest mass extinction event take place?
a)
Cretaceous
b)
Jurassic
c)
Cambrian
d)
end of the Permian
11.
Which of the following does NOT cause climate change?
a)
volcanoes
b)
earthquakes
c)
meteorites
d)
earth's revolution
12.
What element serves as evidence of a meteorite hitting the earth?
a)
carbon
b)
iodine
c)
chromium
d)
iridium
13.
A _____________ connects two continents that were once separated.
a)
land bridge
b)
sea bridge
c)
continental bridge
d)
oceanic bridge
14.
A physical barrier that causes a population to evolve differently is called...
a)
geographic invitation
b)
land bridge
c)
geographic isolation
d)
mass extinction
15.
Precambrian time is nearly ____% of Earth's history.
a)
75
b)
50
c)
80
d)
90
16.
Multi-cellular life is hypothesized to have appeared on Earth about ____ mya.
a)
345
b)
542
c)
524
d)
245
17.
What is the Cambrian explosion?
a)
sudden appearance of new, complex species
b)
a sudden volcanic eruption
c)
a sudden decrease in species
d)
a mass extinction event
18.
What characteristic of Precambrian life, shown in the figure, contributes to the fact that the Precambrian fossil record is so sparse?
a)
Organisms were multicolored
b)
.All living things were single-celled
c)
Many organisms lived on land.
d)
Many of the organisms had soft bodies.
19.
Order the divisions of geologic time from the longest to the shortest.
a)
eon, era, epoch, period
b)
eon, epoch, era, period
c)
epoch, period, era, eon
d)
eon, era, period, epoch
20.
What occurs at the end of a geologic era?
a)
flood
b)
extinction
c)
comet
d)
mountains form
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