Breaking glass
reversible
Making a shape from playdough
Reversible
Folding paper
reversible
Rust on metal
Irreversible
Melting wax
Reversible
Boiling water
Reversible
Burning wood
Irreversible
Cutting hair
reversible
Cooking an egg
Irreversible
Freezing an ice cube.
Reversible
Baking a cake
Irreversible