Arriving at a good research question takes lots of exploration. These databases are good places for exploration.
Science in Context: This database contains news, magazine, reference and web articles organized around various science topics.
World Book: This database is an online encyclopedia.
Britannica: This database is an online encyclopedia.
ProQuest: This database is a good source of popular periodical articles (ex. National Geographic, Popular Science, Washington Post and New York Times)
These databases contain science papers that capture experimental data and design.