What Your Child Needs To Know
In this question, the ball of plasticine is taken out, separated into four smaller balls and placed back into the jar.
Students have to identify that this question is looking at the properties of plasticine, which is
Solids have a definite volume.
Plasticine is a solid and has a definite volume.
Hence, the total volume occupied by the plasticine, which is still a solid, remains the same, even when it was reshaped into four smaller balls.
Therefore, it would still occupy the same volume in the jar with the water, causing the new water level in the jar to remain at 100ml.
Solids have definite shapes and yet, we are able to change the shape of plasticine easily by exerting a force.
So, is plasticine a solid or a liquid?
Even though plasticine can be reshaped easily, it has a particular shape when left alone and would not take the shape of the container it is in. Conversely, liquids would always take the shape of the container which contains it.
On the other hand, plasticine can only be reshaped only when there is a force acting on it.
Therefore, plasticine is a solid.
I hope that this article has helped to clarify some misconceptions on the topic of Matter, especially with regards to the example of Plasticine!