The Internet as a Resource for News and Information about Science (pdf) from the Pew Internet & American Life Project:

“40 million Americans rely on the internet as their primary source for news and information about science,” second to TV.

Another interesting piece of data: “59% of Americans have been to some sort of science museum in
the past year.” I find this unlikely but… That rises to79% for those that have visited a science website.

The respondents also reported extremely positives views of science, such as (see page 26-28):
To be a strong society, the United States needs to be competitive in science 39% strongly agree 50% agree 8% disagree 1% strongly disagree
Developments in science help make society better 31% 58% 8% 1%
Scientific research is essential to improving the quality of human lives 35% 56% 7% 1%
Science creates more problems than solutions for us and our planet 3% 19% 52% 19%