Area density

Have you ever heard of pancakes? When you cook pancakes, you pour batter onto a flat surface and spread it out to make a round pancake. The thickness of the pancake is like its density. The more batter you pour into the same size pan, the thicker the pancake will be, meaning it will have a higher density.

Now imagine that the flat surface you spread the batter onto is different sizes. You can spread the same amount of batter onto a small pan or a big pan. The same goes for area density, which is a measure of how much stuff (like mass) there is in a certain area.

Think of it like putting a bunch of puzzle pieces on a table. If you put all the puzzle pieces in a small area, they will be more crowded and closer together than if you spread them out over a bigger area. The small area has a higher area density because the same number of puzzle pieces are crammed into a smaller space, while the bigger area has a lower area density because the same number of pieces are spread out over a larger area.

So, in summary, area density is a way to measure how much stuff there is in a certain amount of space. It's like measuring how much batter you pour into a pancake pan or how many puzzle pieces you put in a certain area. The more stuff there is in a certain area, the higher the area density.