Analogy:
1. Germination of seed : slow change. Breaking of glass : _____
2. Irreversible change : Making idly front batter. Reversible change: _____
3. Melting of ice : Physical change. Popping of popcorn : _____
4. Melting : ice into water on heating, freezing: _____
5. Changing of phases of the moon : Natural changes. Cultivation of paddy : _____