Risk and Uncertainty have a specialized meaning in the financial world.
The Wikipedia article on Risk has an extended quote from Risk, Uncertainty, and Profit by Frank Knight (1921). He implies that risk is sometimes mathematically quantifiable, but uncertainty is never quantifiable.
By Knight's reasoning, you would use risk when examining a stock's previous return to predict its future return. If a stock were volatile in the past, one might expect that it would be more volatile in the future and thus have a higher risk. If the price changes of a stock were small and predictable, then one might expect that the price changes would continue to be less volatile in the future and thus have a lower risk.
There is a mathematical concept called expected value that can be used to quantify the risk. It may be based on a probability (such as a coin turning up heads 50% of the time). It may instead be based on statistics (using a concept of variance, which is related to standard deviation). Financial risk is based on expected value, and is quantifiable.
In contrast, by Knight's reasoning, uncertainty would not be quantifiable. The returns of both the volatile and the steady stock in the future are neither knowable nor quantifiable, so the returns are uncertain.
The face that turns up on a die before it is cast is unknowable and therefore uncertain. The probability that it will turn up a 1, 2, or 3 is quantifiable (it will happen in half the cases). So there is a known risk in casting the die and winning $10 if it turns up 1, 2, or 3 while losing $10 if it turns up 4, 5, or 6.
Wikipedia explains that the difference between jam and jelly is that jam uses whole pieces of fruit, while jelly uses the juice:
Properly, the term jam refers to a product made with whole fruit, cut into pieces or crushed...
Jelly is a clear or translucent fruit spread made from sweetened fruit (or vegetable) juice and set using naturally occurring pectin.
Best Answer
Aged means that the person or people you are referring to is/are of the given age. It's always referring to someone. In this case what follows the verb to be is an adjectival phrase acting as a complement, and since it is talking about the subject, it's specifically called a subjective complement. But the important thing is that the main form of [aged 12] is that of an adjectival phrase.
Aged can usually be replaced with of age:
Now, when talking about age alone, age is a noun and [age 11] is a noun phrase. In the case of your examples, [college aged students] and [college age students] represent two different cases of noun modification.
[College aged] is clearly an adjectival phrase.
[College age] is clearly a noun phrase.
In the first case, [[college aged] students] you are modifying a noun [students] with an adjective, which is correct.
In the second case, [[college age] students] you are modifying a noun [students] with another noun, which is also correct.
Summing up: for the specific case of the question, it would be the same and would have almost the same exact effect to use either [college age students] or [college aged students].