Hi Lsavagecurry
The mass of an object relates to weight. The definition of mass is weight, like how heavy something is, say for example I have a balance scale which is the picture below and I put a rock on one side and 4 more smaller rocks on the other side, of course its balanced, u might have thought one or the other is stronger but its equal because the 4 rocks were not as big as the one on the left, they were smaller but due to their quantity it equaled their same mass, but another ex is I put a elephant and a mouse on a scale, who has more mass, answer is elephant because it weighs way more than a mouse, and a mouse barely weighs anything, but its not because of mass only, if maybe there were a billion mouses against that elephant on a scale maybe they could balance it, quantity can also help as well. I hope this helps you with your question and I take no credit for the images below I got them from google.com