How does Earth change?
地球是如何变化的？
The weather can change the Earth in many ways.
天气可以在许多方面改变地球。
If it rains too much, it can flood.
如果雨下得太多，就会泛滥。
If there is too much water in the rivers and streams, water can flow onto the land.
如果河流和溪流中的水太多，水就会流到土地上。
A drought happens if there is no rain.
如果没有雨，就会发生干旱。
The land gets very dry and sometimes it cracks.
土地变得非常干燥，有时会开裂。
Weathering can also change the land.
风化也会改变土地。
Weathering happens when rocks break and change.
风化发生在岩石破裂和变化时。
Erosion happens when wind or water moves rocks and dirt.
当风或水移动岩石和泥土时，就会发生侵蚀。
To prevent erosion, you can dig the Earth and plant a tree.
为了防止侵蚀，你可以挖开地球，种一棵树。
The land can change quickly or slowly.
土地可以快速或缓慢地变化。
The shape of the land is always changing.
土地的形状总是在变化。
Rain, wind and ice can all make the land change.
雨、风和冰都能使土地发生变化。