Geography knowledge quiz, geography question answering

Agree with the answer of the 'doorman'.

The biggest natural disaster on the Loess Plateau must be the cold wave, and this year's Chongqing college entrance examination questions have.

Summary. The lateral erosion of the current widens the river channel and slows down the flow rate, and the sediment carried by the river is deposited on the riverbed, and a layer of sediment accumulates at the bottom of the water. Later, due to factors such as climate change, crustal uplift or erosion datum decline, the down-cutting erosive force of the water flow increased dramatically, and this layer of sediment was cut by the water flow to form a terraced slope.

As the water continues to erode downward, the accumulation on both sides is completely exposed to the water, above the flood level, forming a terraced floor. The river then continues to repeat the processes of lateral erosion, accumulation, and down-cutting erosion to form the next terrace.

The crustal uplift causes a sudden increase in the elevation of rivers in this area, and the down-cutting erosion force of the water flow will increase sharply when the erosion datum does not change, resulting in the outcropping of terraces and the formation of terrace slopes. After the crust is intermittently uplifted, the river continues to erode and accumulate the process, and multi-level terraces appear.

Geography Q&A.

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The lateral erosion of the current widens the river channel and slows down the flow rate, and the sediment carried by the river is deposited on the riverbed, and a layer of sediment accumulates at the bottom of the water. Later, due to factors such as climate change, crustal uplift or erosion datum decline, the down-cutting erosive force of the water flow increased sharply, and this layer of sediment was cut by the water flow to form a step gap slope. As the water continues to erode downward, the accumulation on both sides is completely exposed to the water, above the flood level, forming a terraced floor.

The river then continues to repeat the processes of lateral erosion, accumulation, and down-cutting erosion to form the next terrace. The crustal uplift causes a sudden increase in the elevation of rivers in this area, and the down-cutting erosion force of the water flow will increase sharply when the erosion datum does not change, resulting in the outcropping of terraces and the formation of terrace slopes. After that, the earth's crust was intermittently uplifted, and the river continued to erode and accumulate the process, and there were multiple stages of watery land.

When the crust is raised, the riverbed is relatively raised, the groundwater level is relatively lower, and then the water level difference is formed, which is eroded, and the river is cut down. The main reason for Qingxian is the frictional erosion of the rock at the bottom of the river and the difference in the water level (i.e., the erosion of the old erosion datum or the groundwater level) during the flow of the river, and the frictional erosion of the river is the force caused by the physical kinetic energy acting on the rock mass for frictional erosion.

The difference in water level is the potential energy caused by the height difference between the river and the groundwater level to drive the erosion of the water flow, because the river continues to cut down and erode, and finally erodes to the groundwater level, the river slag water body and the groundwater body directly have no other geological bodies, it will stop erosion, and then produce side hail and erosion (which is why the downstream of the river is dominated by side erosion), and there is an ultimate erosion datum is the sea level. Down-cutting erosion: The process of the river cutting the rock downwards under the action of the water flow, deepening the river channel and lowering the river bed.

Trouble the teacher, the above is simply admired.

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These two questions. It's a question.

Resend it**, this picture is too blurry to see clearly.

Question 8 B7c

I really can't see it clearly.

It's okay. A meal to zoom in.

With the increase of altitude, the green transition zone on the birch forest A tree diameter becomes larger, B coniferous forest zone appears, C becomes sparse, D The shrubs gradually decrease.

Tell me one more of this.

I'll take a look. The shrubs are gradually decreasing.

The forest belt is growing, and the shrubs are decreasing.

Summary. Question 1: The atoll journey: The calcareous bones that accumulate after the coral dies will form this kind of atoll, and it may also be an island. Affected by various factors such as **, ocean currents, volcanoes, etc., the atoll may change shape.

Students, please provide the following questions?

The above five questions help me to answer them in points, thank you.

Good. Question 1: Atoll travel process: The calcareous skeletons that accumulate after the death of the coral will form such an atoll, or it may be an island. Affected by various factors such as **, ocean currents, volcanoes, etc., the atoll may change its shape.

Second, the degradation of coral reef ecosystems is due to mariculture, invasion of alien species and overfishing, which are the main causes of ecosystem degradation.

Question 3: The reason for the large wave is that it is located in a narrow sea area, where the circulation converges, and the wind increases through the middle of the sea area.

Fourth, the role of the tidal channel is the channel for the entry and exit of the tide, which is a natural fishery farm, which is conducive to the development of the fishery.

Question 5, do not agree to vigorously develop fisheries, overdevelopment and overfishing will cause imbalance in the surrounding ecosystem, damage the ecology of the reef, is not conducive to the development of fisheries.

The above 4 questions are answered point by point, thank you.