Compared to continental rocks, some of which are more than 4 billion years old, the rocks of the ocean floor are:.

These factors threaten north americas ecosystems

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

What is an example of a line segment