This report should adhere to a more formal lab report structure. You can see what that entails here.
Compare the results of these two methods in in your report.
How large a mass would have to be placed on top of the wooden block when floating in the water so that the block would be completely submerged, i.e. its top would be level with the surface of the water?
Use the table of densities to make a guess as to the composition of the unknown liquid.