soil

Soil

土壤

What is soil? The land is covered with a layer of dirt. This dirt is called soil. Soil can be sandy. Soil can be rocky. Soil can be like clay. Do you know how soil is made?

什么是土壤? 陆地被一层泥土所覆盖。这些泥土叫做土壤。 土壤可以是沙状的。土壤可以是由岩石形成。土壤可以像粘土一样。 你知道土壤是怎么形成的吗?

How is soil made? It takes a very long time for soil to be made. Soil is made from pieces of rock. The pieces of rock are mixed with animalsand plants that have died and rotted.

土壤是怎么形成的? 土壤的形成需要很漫长的时间。土壤是由岩石的碎片形成的。这些岩石碎片中混杂着死亡和腐烂的动植物的躯体。

Some rocks lie on top of the ground. Rain falls on them. Snow and ice cover them. The wind blows them. After a long time, the water, the cold, and the wind help break the rocks into pieces.

有些岩石位于地表，雨水落在他们上面。冰雪覆盖着它们。 风吹着他们。 过了很长一段时间，经过水，寒冷和风的共同作用岩石破裂成一块块的碎片。

These pieces of rock then breakinto smaller and smaller pieces. After thousands of years, the tiny piecesof rock become soil.

这些岩石的碎片会越来越小。 几千年后，微小的岩石碎片变成了土壤。

Plants and animals also help make soil. Fallen leaves and dead plantslie on the ground. When animals die, their bodiesalso lie on the ground. Hot sun shines on them. Cold rain falls on them. Snow and ice cover them.

植物和动物也有助于土壤的形成。落叶和枯死的植物堆积在地面上。 当动物死去，他们的身体也会堆积在地面上。炽热的阳光照射着他们。 冰冷的雨水浇在他们身上。冰雪覆盖着它们。