外力感化对地表形状的影响(国外英文资料).docVIP

外力作用对地表形态的影响(国外英文资料) Effects of external forces on surface morphology Zhu lei of qingyuan middle school Lesson guide: T: this picture should be familiar to you. Which is the scenery Sheng: three gorges, guilin landscape This is the scenery of the three gorges. Do you know how the landscape of guilin is formed? S: I dont know New lesson: T: it seems that there are many questions. In this video, were going to study the effects of external forces on surface morphology. Through this study, we can solve the causes of the landscape in guilin. I will give you a few minutes to read the textbook for a few minutes. T: are you finished? Its all in the textbook, and it should be done by reading the textbook. So lets review what we did in the last video, and think about what is the effect of internal forces on surface morphology? Life: internal forces make the surface of the earth rise and fall Teacher: is the landscape of the mountains around us only formed by internal forces? S: not Teacher: if you build a house, you build the frame and then decorate it. The surface landscape we see is not simply a matter of internal forces. It also requires an external force. In this lesson we will focus on the effect of external forces on surface morphology. Teacher: first think: what are the energy sources and expressions of external forces? The energy derived from the external forces is derived from the energy of the solar radiation, and the main form is: weathering, erosion, carrying, deposition, and solidification. T: what is the connection between the forms of these forces? Student: a rock that is exposed to the surface of the earths surface is cooled by heat, and becomes a detritus. The rock becomes a detritus and is eroded, transported, deposited. The process is about the same as the sedimentary rocks we talked about. This is called mechanical weathering, and in addition to biological weathering and chemical weathering. Teacher: what are the common external forces in our natural worl