2. The sea floor
• The sea-floor of earth
is one of the most
unique things in the
whole world.
• Seafloor-spreading is
one of the many
things that happens in
the seafloor
3. What is seafloor-spreading?
• Seafloor-spreading is the formation of new
areas of oceanic crust, which occurs
through the upwelling of magma at mid-
ocean ridges and its subsequent outward
movement on either side.
4. What does it do?
• Seafloor spreading helps explain
continental drift in the theory of plate
tectonics
5. How does it occur?
• Sea floor spreading starts with volcanic
activity on the ocean floor. When the earth
cracks apart at the plates, magma rises to
the surface and pushes the plates farther
apart.
