Some students think that for the same mass of a substance, the liquid will weigh less than the solid

They may think that all substances are denser in solid state than in liquid.

References

• Andersson, B., (1990) Pupils' Conceptions of Matter and its Transformations, Studies in Science Education, 18, 53-85.

  This research shows that some of the misconceptions students have about matter are reinforced by the learning materials and approaches used in classrooms. Textbook illustrations can give false impressions about sizes, scales and movement and the limitations of models can give misleading ideas. This paper explains why teachers need to be aware of the misconceptions that can be produced and how to tackle some of them.
  
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