Why is radar useful when mapping areas that tend to be covered in clouds

Radar uses waves of energy to map a surface. The waves can move through clouds and water, so a cloudy area can be mapped.

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.