People were able to specialize in specific jobs because

Which phrase best describes surface currents? 1. up-and-down ocean movement caused by wind 2. waves that hit the shore at an angle and transport sand 3. streams of warm water flowing through the ocean and caused by wind 4. waves that approach the shore and cause their crests to fall into their troughs

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.