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]
(..) The sun influences life in the oceans just as it does on land. Its richest parts are those where waves and currents bring fertilising nutrients to surface waters that are bathed in sunlight. The seas off the Cape in South Africa have this magic recipe and are hugely productive. (..)2006 TvShow: Planet Earth Title: From Pole to Pole Season: 1 Episode 1
(..) more or less constant all year round. That is why the jungle grows so vigourously and supports so much life. This forest covers only percent of the planet's surface, but it contains more than percent of all its plants and animals. The canopy is particularly rich. There are monkeys, birds (..)2006 TvShow: Planet Earth Title: From Pole to Pole Season: 1 Episode 1