Sponges are used by humans every day, from washing the dishes to cleaning up a mess! Some sponges are natural, but others are artificially made. In this post, we will be focusing on the artificial or synthetic sponges. Sponges are able to absorb water because they retain or keep in water very well. This is because of the fibers and holes in the sponge. The sponge has many small holes and passages that may have dead ends. When you put the sponge in water, the water goes inside of the holes and gets trapped in the passages by the fibers. Those fibers give the sponge its unique properties. Then, when you squeeze a sponge, the passages get smaller and the fibers start to let go of the water. That is how sponges absorb water!