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