What causes surface currents in the ocean A• wind blowing across the surface

B• upwelling

C• salinity diffidences { not it

D• water density difference

State the formula for density in words and mathematical symbols

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory