Water is very special because it can change its form.
水是非常特别的，因为它可以改变形态。
It can be a liquid, a solid, or a gas.
它可以是液态、固态或气态。
Liquid water is the water we drink and use every day.
液态水就是我们每天喝的和使用的水。
When the temperature gets very cold, water turns into ice.
当温度变得很低时，水会变成冰。
Ice is the solid form of water.
冰是水的固态形态。
If we heat the ice, it melts back into water.
如果我们加热冰，它会融化成水。
This happens when the temperature is above 0°C.
这种情况发生在温度高于 0°C 时。
When we heat water even more, it changes into steam.
当我们继续加热水，它会变成水蒸气。
Steam is the gas form of water.
水蒸气是水的气态形态。
This happens when water reaches 100°C.
当水温达到 100°C 时，就会发生这种变化。
The process of water turning into steam is called "evaporation."
水变成水蒸气的过程叫做“蒸发”。
When steam cools down, it turns back into liquid water.
当水蒸气冷却后，它会变回液态水。
This process is called "condensation."
这个过程叫做“冷凝”。
Water moves through these changes in nature all the time.
水在自然界中不断经历这些变化。
Rain comes from clouds, where water vapor turns back into liquid.
雨水来自云层，那里水蒸气变回了液态水。
Ice melts in the sun and becomes water again.
冰在阳光下融化，又变成了水。
Water on the ground evaporates and becomes clouds in the sky.
地面的水蒸发，变成天空中的云。
These changes happen because of temperature.
这些变化是由温度变化引起的。
Now you know that water can be a liquid, solid, or gas, and it changes with heat and cold!
现在你知道水可以是液态、固态或气态，并且它会随着冷热变化而改变形态了！
