30 state changes

1. Water drops on summer sorbet (melt)

2. Ice particles turn into raindrops and fall (melt)

When repairing asphalt road, use melting furnace to melt asphalt.

When ice is placed in the sun, it will become water (melt) in a short time.

Put steel into the steelmaking furnace and it will soon become molten steel.

6. Pure water condenses into ice (solidification)

7. Casting molten steel into wheels (solidification)

During the snowstorm, icicles formed on telephone poles.

9. Molten steel is cast into train wheels (solidified)

10. Volcanic eruption (melting before solidification)

1 1. In autumn, the morning fog disappears after the sun comes out (vaporization-evaporation).

12. The water spilled on the ground disappeared (vaporization-evaporation)

13. The alcohol rubbed on the skin dries immediately (vaporization-evaporation).

14. I feel cold after swimming ashore (evaporation-evaporation)

15. Boil a pot of water (boil by vaporization)

16. In summer, white gas (liquefaction) will be emitted around the popsicle.

17. In summer, the outer layer of the water tank "perspires" (liquefies).

18, in the morning, water droplets on vegetation (liquefied)

19. Fog and dew in the morning (liquefaction)

20. In summer, the beverage cans taken out of the refrigerator will "sweat" (liquefy).

2 1. After taking a hot bath, the glass in the bathroom becomes blurred, and then becomes clear (first liquefied and then vaporized).

22. When the electric water heater is used to boil water, "white steam" is constantly emitted when boiling (first vaporized and then liquefied).

23. When iodine is heated at high temperature, the volume of iodine becomes smaller (sublimated).

24. The mothballs in the suitcase gradually become smaller (sublimated).

25. Clothes frozen outdoors in winter will also dry (sublimate).

26. In the cold winter, the snowman becomes smaller (sublimated).

27. The filament (tungsten filament) is thinned (sublimated)

28. Dry ice (solid carbon dioxide) is used for artificial rainfall (sublimation before liquefaction).

29. In winter, ice flowers (or "window grilles") (sublimation) are formed on the inner surface of glass windows.

30. The tiles on the roof are covered with frost.

3 1. Hanging Trees in Northern Winter (Ninghua)

32. Wusong (Ninghua) in the snowstorm in the south.

33. The light bulb (tungsten wire) is black (Ninghua).

34. "White powder" found in ice cream paper (Ninghua)

35. Dry ice (solid carbon dioxide) is used to create a wonderful stage effect (sublimation before liquefaction).

36. The formation of rain: ① vaporization (or evaporation) → liquefaction → solidification → melting; ② Vaporization (or evaporation) → sublimation → melting.

③ Vaporization (or evaporation) → liquefaction

Three names for water:

Solids: ice (solidification), frost (condensation), snow (condensation), glaze, "window grilles" (condensation), hail (solidification) and Bai Bing.

Liquid state: water, dew (liquefaction), rain (liquefaction), fog (liquefaction) and "white gas" (liquefaction).

Gaseous: water vapor Note: Water vapor is invisible, and water droplets formed by water vapor liquefaction are visible.