Because a great part of a sponge is air.
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Sponge is solid because its particles are closely packed together, but it is compressible due to the nature of its porous structure. The empty spaces or pores within the sponge allow it to easily deform and compress when pressure is applied, making it squishy and flexible.
A sponge is a flexible solid with many air holes. because it is flexible the sponge can be pressed into the air holes when the pressure is released shape memory returns it to its former shape.
Sponges are compressible because they are porous and made up of interconnected air pockets. When pressure is applied to a sponge, the air within the pores is forced out, allowing the sponge to compress.
A sponge is considered a solid because its particles are closely packed together, giving it a fixed shape and volume. However, it is compressible because the particles can be forced closer together under pressure, allowing the sponge to reduce its volume when squeezed.
Yes, pebbles are compressible to some degree. When force is applied to a pebble, it can experience compression, leading to a decrease in volume. However, due to their solid and dense nature, pebbles are not as compressible as, for example, a gas or a sponge.
A sponge is usually in a solid state of matter.