Why does a sponge get bigger in water?

Sponges get bigger in water due to a process called absorption. Absorption is the process by which a liquid is taken up or soaked into a solid material, in this case, the sponge. When a sponge is placed in water, the water molecules are attracted to the sponge's fibers and are drawn into the sponge's pores. This causes the sponge to expand and become larger in size. The sponge will continue to absorb water until it reaches its maximum capacity, at which point it will stop expanding.

The ability of a sponge to absorb water is due to its unique structure. Sponges are made up of a network of interconnected fibers that form a porous material. These pores are very small, allowing water molecules to enter but preventing larger particles, such as dirt and sand, from entering. The pores also create a large surface area for the water to come into contact with, which increases the rate of absorption.

Sponges are made from various materials, including cellulose, polyester, and polyurethane. Cellulose sponges are made from plant fibers, while polyester and polyurethane sponges are made from synthetic materials. Cellulose sponges are biodegradable and environmentally friendly, while polyester and polyurethane sponges are more durable and can withstand repeated use.

Sponges have many uses, including cleaning, absorbing spills, and personal hygiene. They are commonly used in kitchens, bathrooms, and other household areas.