You can use the 'greater than' (>) , 'equal to' (=) or 'less than' (<) signs to help you compare the mass of two objects. On this set of scales you can see there is a small unlabelled mark halfway ...

When you compare the mass of objects, you can use the words 'heavier' and 'heaviest, or 'lighter' and 'lightest' Now look at these two animals. If you are comparing them you might say ...