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Answer:
1. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor. Evaporation is a very important part of the water cycle. Heat from the sun, or solar energy, powers the evaporation process.
2. When water is cooled, the water molecules move slower and get closer together. This makes cold water more dense than room temperature water. Since cold water is more dense, it sinks in the room temperature water. When water is heated, the water molecules move faster and spread out more.
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Answer:
1:when the water is heated it evaporates and turn into gas
2:when the water is cooled it turns into solid like an ice
3: just combined the answer in no1 and 2