In grad school it's not much but the perks are nice.
Most scientists need a Master's or PhD (doctoral) degree, which I like to call "college after college." During this time, a scientist-in-training usually is paid very little, from minimum wage to $12 an hour, kind of like a fast food or retail store job. In some cases, they aren't paid at all because it is "school." However, on the bright side, you are getting paid to go to school, which is a lot better than when we had to pay for the college degree! Another fun benefit is getting to travel for free; for example, I have some friends who were paid to go to Germany to do research for a summer. I have travelled to Germany also, and to cities in the USA for conferences. My uncle, a bird researcher, has gotten to travel the entire world; North and South America, Asia, Australia, Africa, Europe, and even Antarctica, all to see rare birds!
A few grad students can also get something called a fellowship. It is similar to a scholarship, but usually has some expectations. For example, I work with the Symbi GK12 program, where I get 40% more pay while going to a middle school once a week to teach science. But in all of these cases, we don't take this type of job with the expectation to do it forever.
Then you get a choice...
Once you finish your degree, you then choose between three routes: professor, industry, or starting a business.
The professor makes a pretty good living, and based on the data for Iowa, the total range is ~$60,000-$600,000, and in my experience around $100,000 or so is common. For the industry direction, a scientist will usually get a job at a corporation, and here, the top end of the salary range is longer. In some companies scientists can become top executives and earn millions, but in most cases a good scientist or engineer will earn in the $80,000-$200,000 range, depending on the demand for his field.
In the last case, some scientists start a business based on their research. This is the riskiest path, but as the old saying goes, "Risk gets rewarded, hard work only gets a paycheck." If the business fails he gets nothing, but if it takes off... well, Google was a grad student's project to make searching websites easier and faster, and look how big that company is now! There are a number of cases where a scientist or engineer will get a normal job so that he can still eat if the business fails, but also start a business to take a chance on it being successful.
Do you want to use science to up your pay?
Not only can you do the traditional route and go to college, you can also go to groups like MakerSpaces, HackerSpaces, and various Meetups to get some scientific literacy, and then use that to get a better job or start a technology-related business. Keep in mind that the founder of Tumblr, for example, started in middle school, teaching himself how to code.