SAN FRANCISCO — Everybody knows Google is working on a lot of things besides search. Wall Street wants to know when all those projects will start making a lot of money.

In the last three months of 2014, Google’s net revenue growth slowed to 10 percent when compared with the same quarter a year ago, according to an earnings report released Thursday. While impressive for a company with more than $60 billion in revenue, it is well short of the recent results of other tech industry standard-bearers, like Apple and Facebook.

The report stoked fears that while Google has a broad range of interests, from self-driving cars to insurance recommendations, it is still highly dependent on the business it essentially started with: selling ads against its Internet search results.

Google’s search business would still be the envy of most companies. Revenue from Google’s own sites, which includes things like its search engine and YouTube and accounts for a little more than two-thirds of the company’s business, increased 18 percent compared with a year ago. Indeed, Google’s share of search ad spending in the United States, including desktop and mobile devices, was 71.6 percent in 2014, according to eMarketer.