星期天,爸爸带小光到三楼房顶的阳台上去玩。小光看见阳台上长满了小草,就奇怪地问:“爸爸,是谁在阳台上种了这么多草?”爸爸笑着说:“是风爷爷。”小光更奇怪了,“风爷爷怎么会种草呢?”爸爸说:“草种很小,刮风时,风把泥沙、草的种子都带到空中,吹到四面八方。有的草种落到阳台上,而阳台上的薄薄的一层泥沙、灰尘,正好成为长草的土壤。下雨天,阳台上能淋到雨,晴天,能晒到太阳。这样,种子就发芽了,长 On Sunday, Dad took a little light to play on the balcony on the third floor of the roof. Small light to see the balcony covered with grass, weird to ask: “Dad, who is the balcony so planted so much grass?” Father said with a smile: “The wind is the grandfather.” Little light even more strange, “the wind Grandpa how to plant grass? ”Dad said:" The grass is very small, windy, the wind to the sand, grass seeds are brought to the air, blowing in all directions. Some grass fell on the balcony, and on the balcony The thin layer of sediment, dust, just become the grass of the long grass. Rainy day, the balcony can be rain, sunny, sun to the sun. In this way, the seeds germinate, long