As water in the oceans cools down, it tends to
a. rise
b. sink
c. form a gyre
d. create tides

Drag the tiles to the correct boxes to complete the pairs. match the stages to their features. low birth rates, death rates are constant high birth rate, and death rate high birth rate and low death rate pre-modern mature industrial industrialization

Distance that the transcontinental railroad covered from omaha to san francisco.

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?