Question

give as many as possible examples (all the changes - reversible, irreversible, fast, slow, desirable and undesirable)

Answer 1

Irreversible

tearing of paper

cutting of apple

cooking food

Reversible:

melting of ice

freezing of water

Slow

growing of crops

Answer 2

Answer:

1. reversible chanhe: melting.
2. irreversible change: burning of wood.
3. fasr: running.
4. slow: walking .