Anyone who answer will get brainlest

In what direction does the medium move relative to the direction of the wave? explain.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

What is the measure of a change in an objects velocity?