The
Paleozoic
is
known
as
the
Age
of
____________________
.
Land
plants
first
appeared
in
the
____________________
.
The
Carboniferous
includes
the
____________________
and
____________________
Periods
.
Fish
dominated
in
the
____________________
.
The
last
major
ice
age
peaked
during
the
____________________
.
The
____________________
marked
the
time
when
oxygen
became
abundant
in
the
atmosphere
.
First
____________________
appeared
3
.
8bya
.
Dinosaurs
died
at
the
end
of
the
____________________
.
The
Mesozoic
is
known
as
the
Age
of
____________________
.
The
Cenozoic
is
known
as
the
Age
of
____________________
.
Life
was
able
to
evolve
when
the
____________________
____________________
formed
.
Lucy
was
one
of
the
oldest
____________________
____________________
found
in
Africa
.
The
____________________
was
the
first
mammal
species
.
The
world's
richest
fossil
bed
is
the
____________________
____________________
.
Hell's
____________________
contains
many
fossils
from
the
____________________
Era
.
The
rich
coal
beds
in
the
Appalachians
formed
during
the
____________________
.
The
Great
Dying
occurred
at
the
end
of
the
____________________
and
____________________
of
species
died
.
