What is the total salt content of seawater as measured in parts per thousand (ppt)? . a. 3.5 ppt. b. 350 ppt. c. 3 ppt. d. 35 ppt.

Iknow the answer is a but i don't know why

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.