Solid

Real World Example

Imagine trying to fit your mismatched Tupperware lids onto their containers after a big meal. Just like how each lid has a specific shape and size that only fits its matching container, solids have a definite shape and volume that don’t change regardless of their surroundings. The Tupperware container represents the solid, maintaining its shape and size, while the lid is like the environment, which cannot alter the form of the solid unless it fits perfectly.