The mississippi-missouri-ohio river system is the river system in the world.

What causes the cyclical changes in the appearance of the moon?

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.

In the figure, polygon abcd is transformed to create polygon a′b′c′d′. this transformation is a by a factor of .