<p>Luckily for you, I don't think Cal Tech is "the US in general (culturally/socially/politically/what-have-you)", exactly. Most of the U.S. kids there will have been significantly outside the U.S. mainstream in one or more dimensions, probably in some of the same ways a 16-year-old Indian girl who is going there is not exactly typical of "India in general". Also, of course, the U.S. is a pretty diverse place -- both more and less diverse than India, depending on what you're looking at -- so that in many important areas there is no "U.S. in general".</p>
<p>That said, you undoubtedly have access to more information than you could possibly digest, in the form of American popular culture that permeates the world. American movies, books, music are all perhaps only slightly more accurate in depicting American society than their Indian equivalents are with respect to Indian society -- which is to say, not very, but you can learn a lot by thinking intelligently about the nuances and discounting the dramatic elements. There is also a considerable and growing body of literature and film dealing with Indians' reactions to the U.S. Those may not all be your reactions, but they can serve as some sort of guide to what people you are familiar with are likely to notice. I'm thinking of books by Jhumpa Lahiri, Vikram Seth, and Ved Mehta, and parts of some of Salman Rushdie's more recent books (and, at one remove Khaled Hosseini's The Kite Runner), and Mira Nair's movies. Also, lots of Bollywood-type movies now take place in the U.S. and feature Indian protagonists' (and the filmmakers') reactions to America (which are very interestingly different from the equivalent material about Britain). A number of Indian students I have met enjoyed a movie that came out 5 or 6 years ago called American Desi, about Indian (U.S.-born and immigrant) students at an American university (not much like Cal Tech); it is far from completely realistic, but I know lots of it resonated with them.</p>
<p>Pay attention to regional differences, and understand that there are no absolutes: religion, and especially evangelical Protestantism, is very important in the American South, much less so in California, but there are plenty of people in the South who don't care about it and plenty of people in California who do.</p>
<p>A few things I believe are things you may notice:</p>
<p>-- In the U.S., there is something of a cult of creativity and genius. In academia and elsewhere, rote memorization and comprehensive knowledge are comparatively less valued than innovation, "thinking outside the box", etc.</p>
<p>-- There is less automatic respect for elders and authority. To some extent, it is a difference of superficial style, but to some considerable extent it is also real. By their late teens, most U.S. teenagers either expect to make their own decisions free of parental influence and to live independently, or believe that that's the norm whether or not they follow it.</p>
<p>-- People are more open about sexuality -- again, partly as a matter of style, but also partly as a matter of substance. In most contexts, especially in most universities, it would be considered wrong to react negatively to homosexuality in any way. If you are 16, your personal relationship to your own sexuality is bound to get more complex for a few years no matter where you live, and cultural differences won't make anything easier. Whether you think it's relevant to you or not, you should understand birth control and the prevention of sexually transmitted diseases. (Those things tend to have been drummed into the heads of educated American youth from a very early age. It may not occur to people that you aren't thoroughly familiar with them, if you're not.)</p>
<p>-- Americans "in general" are shockingly ignorant about the rest of the world, and even more shockingly ignorant that they are missing anything. Most of the world is forced to pay attention to America, to try to understand it. Most Americans don't feel forced to pay attention to the rest of the world much, and when they do it's often in very simplistic, American terms. There's a reason George W. Bush got elected President twice.</p>
<p>-- Social class matters in America, but in very complex ways. Americans tend to believe in democratic ideals, and to dislike snobs. Class-marking behaviors can get very confused: wealthy, educated people will sometimes imitate underclass or working-class culture, striving poor people will imitate the rich. Wealth and class are not identical. Americans also believe in social mobility, more than the facts warrant, perhaps, but that belief is critical to American culture.</p>
<p>-- The health care system is fragmented and horribly expensive, and there is no universal health care. Take time to understand your health insurance situation now.</p>