To make up for the differences in water levels between the ocean and the great lakes, the st. lawrence seaway includes a series of

Abag contains purple marbles and red marbles, 114 in total. the number of purplemarbles is 6 more than 5 times the number of red marbles. how many purplemarbles are there?

How much water is in the ocean in cubic kilometers

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.