Water

Water is one of the four substances (ground , air , flame , water ) . It can be at three properties . There are fluid , ice and gas properties . They can recycle another other . The water cover of Earth calles hydrosphere . The water system of our planet include rivers , lakes , underground sources , seas , oceans . Clouds acumulate water and it flows at land such as rain , snow , storm , hail . Human body consist of 70 per cent of water . Even all alive organisms contain this substance . We must like it at all it forms , because this is ours life .