Week 7 formative task

4 year old Ibrahim and his auntie go to café for a drink. His auntie buys two cartons of apple juice which are identical in size. She pours Ibrahim's carton into a tall narrow glass. She pours her own carton into a short wide glass. Ibrahim says to his auntie 'I have got more juice than you'

Briefly describe Piaget's concept of conservation. Refer to Ibrahim in your answer.