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UC Library Search is a good place to start your research since it allows you to search across articles, books, and more. You can find and request books from UCB and the other UCs (UCB Law Library not included). Use filters to narrow your results.
Most science books and articles will be online, so you'll need to be on Eduroam wifi or to use the proxy or VPN from off campus.
Your textbooks may be online through the Library's e-reserves program (if not, ask your instructor!)
In addition to UC Library Search, there are other tools (databases) for finding articles. Many are optimized for particular subject areas. Whatever tool you are using, you should look for links to get to the full text.
Get help with your technology at several campus locations or via phone or email.
Getting more specific
Here are other guides to look at when you want library resources specific to your major or subject area - for example, recommendations for article databases are listed in the 'articles' tabs. The guides are geared towards grad students and others doing research in these subject areas, so they tend to be a bit information-dense.