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Speak to usIn this unit, the students will investigate the concept of mass. They will choose some objects and identify and prove which is the heaviest. The students will use equipment such as an equal arm balance and scales to prove their results. Students will record the mass of objects using formal units of measurement. The students will then order a range of objects according to their mass. They will estimate and prove their order using scales. The students will appreciate the need for a unit of measurement smaller than a kilogram.