Across
- 4. Auroras, lightning, and welding arcs.
- 5. Drying clothes under the sun.
- 8. particle model has four main tenets: All substances are made of particles.
- 9. Water turning into ice when the temperature drops below 0˚C.
- 12. change phase changes include melting, freezing, condensation, evaporation, and sublimation.
- 14. A liquid at high pressure has a higher boiling point than when that liquid is at atmospheric pressure.
- 15. Particles do not change. The infinitive 'to' in 'to fly' is an example of a particle.
- 17. ice cube melting into liquid water.
Down
- 1. Dew, Fog, Frost, Mist.
- 2. Dry ice, camphor, naphthalene etc.
- 3. The higher the dew point rises, the greater the amount of moisture in the air.
- 6. Air Helium Nitrogen Freon Carbon dioxide Water vapor Hydrogen Natural gas.
- 7. Freezing of water to form ice in an ice cube tray.
- 10. The most familiar examples of phases are solids, liquids, and gases.
- 11. when warm moist air inside a house comes into contact with a freezing cold windowpane, water vapor in the air changes to tiny ice crystals.
- 13. The melting point of ice is 0°C.
- 16. common table salt, table sugar, water ice, frozen carbon dioxide (dry ice), glass, rock, most metals, and wood.