WHOEVER ANSWEERS FIRST WILL GET BRAINLIEST

A student conducted a scientific investigation on the magnetic properties of iron. She used a magnet to try to pick up iron nails.

After making several observations, which question can she answer?

Which part of a magnet is strongest at attracting iron?
How fast does iron lose its magnetism?
What is the importance of studying the magnetic field of a magnet?
How does the color of iron change with exposure to air?

How do temperature and salinity affect deepwater currents? question 15 options: 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.