1.  It is difficult to study the ocean floor because of the
a.  high pressure        b.  lack of light        c.  cold temperatures        d.  all of the above

Name the following seafloor features.
2.  A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent        _________________________

3.  A smooth, nearly flat region of the deep ocean floor.  _________________________

4.  A mountain on the ocean floor that is completely under water.  _________________________

5.  A steep incline leading down from the edge of the continent shelf.  _________________________

6.  The continuous range of mountains on the ocean floor that winds around the Earth.  _________________________

7.  A deep canyon in the ocean floor.  _________________________

8.  New seafloor is formed at mid-ocean ridges as plates
a.  converge           b.  diverge            c.  sink                d.  collide

9.  Old seafloor is consumed at trenches as plates
a.  converge            b.  diverge            c.  separate

10.  Seafloor rocks near the mid-ocean ridge are ______________ than the rocks far from the mid-ocean ridge.
a.  younger              b.  older