Water is always on the move. This movement is called the water cycle(循环).
Water is all around us. It is under the surface(表面) of the ground. It is on the Earth’s surface. It is in the air. Water becomes different as it moves from place to place.
Water can turn into ice if the weather is very very cold. Water turns into a liquid(液体) or a vapor(蒸汽) when it is warmed by the sun. As vapor, it moves slowly in the air. It falls back to Earth as rain or snow. Then the cycle starts all over again.
本时文内容由奇速英语国际教育研究院原创编写,未经书面授权,禁止复制和任何商业用途,版权所有,侵权必究!(作者投稿及时文阅读定制请联系微信:18980471698)