Earth's
gravity
interacts
with
other
objects
in
space
,
especially
the
Sun
and
the
Moon
,
Earth's
only
natural
satellite
.
axis
of
rotation
is
tilted
with
respect
to
its
orbital
plane
,
producing
seasons
on
Earth
.
orientation
on
its
axis
,
and
gradually
slows
its
rotation
.
lithosphere
is
divided
into
several
rigid
tectonic
plates
that
migrate
across
the
surface
over
periods
of
many
millions
of
years
.
surface
is
covered
with
water
,
mostly
by
oceans
.
polar
regions
are
covered
in
ice
,
including
the
Antarctic
ice
sheet
and
the
sea
ice
of
the
Arctic
ice
pack
.
interior
remains
active
with
a
solid
iron
inner
core
,
a
liquid
outer
core
that
generates
the
Earth's
magnetic
field
,
and
a
convecting
mantle
that
drives
Set chart data parameter as a string
plate