At a convergent boundary, plates come together and collide. Which
is often formed at this type of
boundary?
A. a mountain
B. a mid-ocean ridge
C. a sandbar
D. a barrier island

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

How do oceanographers measure the salinity of ocean water?

In order from largest to smallest what are earths five main oceans