What
is
this
landform
(N
34.797274°
W
110.588969°),
how
did
it
form, and
what
is
the
volume
of
the
hole?
To
figure
out
the
volume
of
the
hole,
you
will
need
to
assume
that
this
feature
has
the
shape
of
a
half-sphere.
Then,
you
will
need
the
formula
for
the
volume
of
a
sphere
V.
=4/3
=
r’
However,
this
feature
is
clearly
NOT
a
sphere.
it
is
approximated
by
being
a
half
sphere.
So
the
formulae
you
would
use
would
be
V=2/3*JT
*
¥V
*
'
*
I
You
know
the
value
of
pi
(you
can
use
3.14).
You
just
need
the
radius.
The
radius
is
the
depth
of
the
hole!
If
you
are
in
Google
Earth
you
simply
move
the
cursor
to
the
top
of
the
hole
on
the
side
and
read
the
elevation.
Then,
move
the
cursor
to
the
bottom
of
the
hole
and
read
the
elevation.
Just
subtract
them
(top
-
bottom). Then,
round
the
elevation
difference
in
meters
to
the
NEAREST
10
(10,
20,
30,
or
40).
This
will
make
the
math
easiest.
The
volume
will
have
to
be
measured
in
cubic
meters,
obviously.
Since
this
is
a
multiple-choice
question,
you
only
have
to
get
close
in
terms
of
the
volume
calculation.
This
is
a
doline
made
by
the
collapse
of
limestone
into
a
cave
system
underneath
with
a
volume
of
about
5,000
cubic
meters.
This
is
a
volcanic
maar
made
by
the
explosion
of
a
steam
eruption
with
a
volume
of
about
20,000
cubic
meters.
This
is
a
doline
made
by
the
collapse
of
limestone
into
a
cave
system
underneath.
Its
volume
is
about
5,000
to
22,000
cubic
meters
—--
depending
on
the
version
of
Google
Earth
you
use.
