How do you find the volume of the rock? - Answers

By its mass sweety. :) * * * * * It depends on the size of the rock. If you can lift it, find a container that is big enough to hold it. Put that container inside a collecting tray. Fill the container with water (or another liquid) to a level at least as high as the rock. Mark that level. Put the rock in the container gently. Measure the rise in the level of water and, if appropriate, collect the water that overflowed into the collecting tray. Calculate the difference in the two water levels. Add the overflow volume if appropriate. That sum is the volume of water displaced by the rock and so the volume of the rock. If the rock is too massive to lift or be contained in something you will need to estimate its volume. That can be done by profiling its shape and partitioning that into smaller, more regular shapes. Calculate the volumes of all those shapes and sum the answers.