Section #: 21.1
The Geologic Time Scale
Practice Test
1.
What era of geologic time ended with the largest extinction event in Earth history?
SC.D.1.4.3
a.
the Cretaceous
b.
the Mesozoic
c.
the Paleozoic
d.
the Cenozoic
Hint
2.
What is the shortest division of time in the geologic time scale?
SC.D.1.4.3
a.
an eon
b.
a period
c.
an era
d.
an epoch
3.
What marks the end of the Proterozoic Eon?
SC.D.1.4.3
a.
mammals
b.
free oxygen
c.
the first appearance of organisms with hard parts
d.
oxygen breathing organisms
Hint
4.
According to the figure, what marked the end of the Mesozoic Era?
SC.D.1.4.3
a.
mammals are abundant
b.
the extinction of the dinosaurs
c.
the extinction of many marine invertebrates
d.
the building of the Appalachians ends
Hint
5.
What is the longest division of time in the geologic time scale?
SC.D.1.4.3
a.
an eon
b.
an era
c.
a period
d.
an epoch
Hint
6.
What is the current era?
SC.D.1.4.3
a.
Mesozoic
b.
Cenozoic
c.
Paleozoic
d.
Archean
Hint
7.
What is at the bottom of the geologic time scale?
SC.D.1.4.3
a.
the Silurian Period
b.
the Cenozoic Era
c.
the oldest division of time
d.
the youngest division of time
Hint
