Cole watches his mother pour milk from a small glass into a taller glass. Then she pours it back. Cole not only realizes that the amount of milk didn't change as she poured it from one glass to the other, it stayed the same when she poured it back. Cole must be at least between the ages of:

Question

Quizplus · Accepted Answer

Cole's understanding that the amount of milk remains the same despite changes in the shape of the container indicates he has developed the concept of conservation, which typically occurs during the concrete operational stage, between the ages of seven to eleven years.

Cole Watches His Mother Pour Milk from a Small Glass