Through this chemical reaction, the substance crystallises.

This compound crystallises when cooled.

In this experiment, we will observe the crystallization of naphthalene.

He was observing the behavior of birds.

He was observing the behavior of the birds.

This crystal has a very beautiful shape.

His thoughts finally crystallized.

We conducted a new experiment in science class.

He has the ability to change into a wolf.

We will conduct a new chemistry experiment tomorrow.