in this activity you have to use the appropriate method for measuring the density of matter. you will measure the density of both an iron ball and a piece of gold. remember that first you have to measure their mass using the scale, and then you have to use the measuring cylinder to calculate their volume. finally, use the mathematical formula to calculate the density. and that is all! 

if you do not remember this formula you can look for it in the page "measuring density). 

when you have the results write them and check if they are correct!