I know that there are four dimensions. The first dimension is a straight line I think. Then to get to the second dimension, you square the line and it becomes a square, right? Then you square that, and it becomes a cube, or three-dimensional, which is the dimension we exist in. Am I right so far? Then you cube that again and the fourth dimension is now time, correct? Is it possible to cube that fourth dimension and create a fifth dimension? Just curious.

Your post is just fine in this forum, and your question is a very thoughtful one.

Your analysis of the first 4 dimensions is not quite correct. There are 3 space dimensions and one time dimension in our familiar 4-dimensional space-time universe. Each of the 3 spatial dimensions are not "squares" of the other; they each extend in directions perpendicular to each other in the form of depth, width and height, which each have unit dimensions of length. A rectangular building, for example, might be 20 meters wide, 30 meters deep, and 50 meters high. (Note that I have used meters as the length unit out of respect for your Canadian heritage). Thus, the building extends 20 meters in the first dimension, 30 meters into the 2nd dimension, and 50 meters into the 3rd dimension, as measured by a stationary observer. This is where the time dimension, the 4th dimension, comes in. Time is not a spatial dimension, it is , well, a time dimension. (As an aside, imaginary time can be considered as spatial dimension of unit length, perpendicular to the other 3 dimensions, but this is off subject right now). A person who is moving with respect to the building will measure oh ever so slightly different dimensions of the building in the direction of his/her motion. Now for the 5th dimension. It does exist. It is a spatial dimension. But where is it?

Please visualize a 2-dimensional flat surface, like a very thin piece of paper(since the paper has some thickness to it, it is actually 3 dimensional, but from a distance, it looks like only 2 dimensions because it is so thin. So let's call it a 2 dimensional surface. I hope you're still with me.) Now curve the paper back on itself, bringing its 2 long edges together, so as to form a cylinder. Behold!, the paper surface still has only 2 dimensions, but it has curved into the 3rd dimension, forming the 3 dimensional cylinder. The two dimensional surface now bounds the third dimension, which exists in the inside of the cylinder perpendicular to points in the the other 2-dimensions.
And so it is with the 5th dimension, and the 6th dimension, etc., but according to "M" theory (Membrane Theory or the Mother of all theories), you can't have more than 11 dimensions. Some say the 5th dimension and other higher order dimensions of the universe are curled up so small that they cannot be detected, nor penetrated. When I say small, I mean smaller than the shortest light wave, and smaller than a quark, the basic most tiny particle of matter known. Others say that the 5th dimension, once penetrated, is very large, even perhaps infinite, the gateway to other universes. Unfortunately, not even light waves can escape our 4 dimensional universe, so we can never hope to see the 5th. But gravity waves, the great mystery, might be able to do so, where its high energy may be transformed to matter in the other universes. Heavy Stuff! waves

Thanks gerry, I think I got it. It's pretty complicated stuff. Thanks for using metres.