hey there welcome to the life noggin we
live in a part of the solar system
called the Goldilocks zone where it's
not too hot that all the water
evaporates away but it's also not too
cold where it freezes instead and unless
you're an astronaut the big spherical
Rock will be your home for life but what
if that home suddenly changed what if in
a split second the earth doubled in size
let's assume that the density remains
constant so the mass of the earth
increased as well how would that change
things
well first off gravity would be very
different the earth would have eight
times as much mass and gravity would be
twice as strong so if you stepped on a
scale you'd suddenly weigh twice as much
as before it would be much harder for
you to walk and you get tired much more
easily after all you'd feel like you
were giving another version of yourself
a piggyback ride all day every day which
would look very funny
over the years human bones especially in
the legs would have to become stronger
to support this increased weight
meanwhile trees would start to collapse
and any new trees that grow in their
place might not grow as tall see there's
a limit for how tall a tree can grow
usually around 400 feet or so this limit
is determined by gravity
since the taller the tree is the more
energy is required to transport water
from the roots to the top if the amount
of energy of the tree gains from
photosynthesis is more than the energy
it takes to transport the water it'll
keep growing otherwise it'll stop so if
the earth suddenly got twice as big the
trees like the California redwood may
not be as impressive luckily even though
the gravitational pull of the earth will
be stronger it still won't be enough to
break the moon apart see in order for
that to happen
would have to be within the Earth's
Roche limit this is the minimum distance
the moon can approach the earth without
being torn apart by tidal forces this
happens because the near side of the
moon is pulled in harder than the far
side when the moon gets close enough to
the earth the gravity holding it
together is overcome by this cosmic tug
inside that limit Earth's gravity will
tear the moon apart giving us a ring
like those around Saturn oh and the more
Earth there is the more it will heat up
see if there are more unstable elements
in the crust and interior more heat will
reach the surface and there may be much
more volcanic activity and I don't know
about you but I'd rather not live in a
world where there's a constant threat of
an exploding volcano oh we re already
living in that I'm looking at you
Yellowstone anyway if you could live
anywhere in the universe no limitations
where would it be and why if I could I
totally live in Jupiter's Great Red Spot
it'd be pretty dangerous but I'm an
animation I can totally handle it make
sure you come back every Monday for a
brand new video as always I'm black oh
this has been life noggin don't forget
to keep on thinking