If you think she only did it for the money, you haven't even 'scratched the surface'. [=there are many other factors, reasons, etc., involved]
Despite the 'surface' differences between the two candidates, they are very similar in most ways.
The tension between them is beginning to 'rise to the surface'. [=it is becoming easy to see]
(..) And there are magnetic forces and frictional forces, And it's just a witch's brew, a nightmare, What's going on right above the surface of the black hole. Narrator: The new black hole in the middle Keeps feeding on the body of the star around it. It eats the gas so fast, (..)2010 TvShow: How the Universe Works Title: Black Holes Season: 1 Episode 2
(..) Narrator: If a black hole approached earth, All that gravity would rip asteroids from their orbits And hurl them toward our planet. The earth's surface would become an inferno. It would be the beginning of the end. First, it would swallow up the atmosphere, (..)2010 TvShow: How the Universe Works Title: Black Holes Season: 1 Episode 2