Answer:1. Ice to water – Melting ice cubes.2. Butter to melted butter – When heated in a pan.3. Chocolate to melted chocolate – When used in baking.4. Candle wax melting – When a candle is lit.5. Cheese melting – On top of pizza or burgers.6. Metal melting – In foundries (e.g., iron or aluminum).7. Plastic melting – In recycling or molding.8. Sugar to syrup – When heated for caramel.9. Glass melting – In glass-making industries.10. Crayon melting – Under the sun or heat.11. Snow to water – During warm weather.12. Lead melting – In bullet casting or soldering.13. Ice cream melting – Left out of the freezer.14. Gelatin cubes melting – When heated.15. Lard or fat melting – During cooking.16. Cocoa butter melting – Used in cosmetics.17. Tar or asphalt melting – On hot roads.18. Wax crayons melting – Used in art techniques.19. Sulfur melting – In science experiments.20. Glue stick melting – In a hot glue gun.