Question

Both sand and water take the shape of the vessel in which they are placed yet sand is called a solid .

Answer 1

In the above case both sand and water take the shape of the container in which they are kept yet sand is called a solid and water on the other hand is called a liquid as particles of the sand are very small so they take the shape of a container but each of its particle has a fixed shape so it is a solid on the other hand water molecules are loosely packed and it can flow so it is a liquid.

Answer 2

because the sand's particles are very small