What occurred while the lunar surface was melted by radioactive heat ?

a) lava flows formed maria.
b) earth and a planetesimal collided.
c) the moon became geologically inactive.
d) bombardment by meteoroids formed the highlands.

What does all of the organ system in a human form

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

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.