1. What is the total length of the Yellow River?
2. Which mountain does the Yellow River originate from?
3. Which provinces and regions does the Yellow River flow through?
Where does the Yellow River flow into the Bohai Sea?
Chapter 3: Save the mother river-the future of the Yellow River.
A, students discuss memories with each other and understand the current situation of the Yellow River.
Cut-off: During the 25 years from 1972 to 1996, the lower Yellow River was cut off in 19, with a cumulative cut-off of 57 times, accounting for 682 days, with an average annual cut-off of 36 days. In the 1990s, this interruption was particularly serious. On February 7th, 1997, the Lijin section of the lower Yellow River was cut off for the first time. The cut-off section once extended to Liuyuankou section of Kaifeng City, Henan Province, with a cut-off length of more than 700 kilometers.
Pollution: The water quality of the 7,247-kilometer-long main stream and main tributaries was evaluated. The results show that more than 70% of the river reaches have completely lost the function of drinking water source, of which 1.779 km is seriously polluted; Inferior to the standard of five types of water, this water has actually become a "venom."
At the end of June, 1995, the Jinan section of the Yellow River was cut off for more than 40 days, hoping to have a chance to flow. However, what comes slowly is not the long-awaited sweet river, but a mass of black sewage. There are a lot of bubbles and poisoned fish floating on the river, emitting a pungent smell. ...
At the beginning of 1999, the largest, heaviest and longest-lasting serious water pollution occurred in the reach below Tongguan of the Yellow River, which caused water supply difficulties in some cities and posed a serious threat to people's production and life. The deterioration of water quality not only directly affects people's life and health, but also greatly aggravates the shortage of water resources.
In Sanmenxia City, many citizens feel that tap water smells bad, so they have to spend money to buy well water and spring water in neighboring areas, resulting in the strange phenomenon of "guarding the Yellow River to buy water to eat".
Soil erosion: The Loess Plateau used to have fertile soil and high forest coverage. However, due to logging in past dynasties, the soil lost its protection and was washed away by heavy rain, which led to serious soil erosion and siltation of downstream rivers, leading to flooding. In addition, the bare ground also accelerates the concentration of surface runoff to rivers. The Yellow River is now the river with the largest sediment concentration in China and even the world.
B. Love my Yellow River, and I will do something for it.
(1) Let students speak freely and express their ideas.
1, do you know the main reason why the Yellow River is prone to floods?
Reference answer: The upstream flows through the Loess Plateau, bringing a lot of sediment, which makes the downstream riverbed gradually rise, even higher than farmland, villages and cities. When there is a flood, it will inevitably flood.
Do you know the main reason why the Yellow River is cut off?
Reference answer: It is a violent reflection between human consumption of water resources exceeding its natural limit and human demand and fragile ecological environment.
What do you want to say to the Yellow River most?
Nowadays, the present situation of the Yellow River is worrying. What do you want to do most for the Yellow River?
Please provide a scheme to transform the Yellow River.
(2) Students work in groups of four to complete the following two questions:
1, please design a public service advertisement to protect the mother river.
Please design a public service advertisement for the Yellow River Mother.
Excellent advertising language, such as:
1, every drop of water that the mother river disappears is every regret in our hearts-it is urgent to protect the mother river!
The mother of the Yellow River was crying, and Chinese children saved her.
3. Protect the Yellow River and cherish life.
Wan Li Yellow River roared, and the motherland burst into tears. The wind and rain hit the loess slope, and the more serious the soil erosion is. The descendants of the Chinese people join hands to actively protect greening.
5, the heart is the Yellow River, * * * builds a home.
Appreciation of excellent public service advertisements;
1, the Yellow River is deep, the turbid waves are rolling, and the map of the motherland is devastated: a residual tree drifts with the tide in the flood, and a stump cries helplessly. In the picture, a small building is in danger under the impact of big waves, and people in the small building cry and throw a broken axe.
Slogan: I "love" Mother Yellow River, cut off all stumbling blocks and stay in her arms forever!
Comments: The layout of the picture is reasonable, the meaning is clear at a glance, and the color is bright, which makes people feel shocked. The slogan is concise and ironic.
2. Title 1: Once-
A blue river winds and flows, trees are shaded, and birds fly happily under the blue sky and white clouds. Accompanied by pleasant music, the ancient name "River" emerged in the river.
Title 2: Now!
In the harsh flash sound, the current situation of the Yellow River was photographed: among the shocking stumps, the turbidity current was surging, the sky was no longer clear, the birds stopped singing, and the dust filled the picture. The appearance of the name "Yellow River" is thought-provoking.
Title 3: Future?
There is only a dry and cracked land.
Comments: The rhythmic picture has a strong contrast effect. Using three words to express the change of time is concise and clear, and the use of punctuation marks is also quite clever.
Activity summary: Our trip to the Yellow River will soon end, but our long-term love for the Yellow River and the earth will never end. In this activity, we organically combined Chinese with geography, history and other disciplines, broadened the field of Chinese learning and application, and enabled students to broaden their horizons, increase their knowledge and strengthen their awareness of environmental protection in interdisciplinary learning. The form of group report stimulates students' subjective consciousness, which is participatory, cooperative and innovative. In the process of learning, students not only learn the methods of obtaining information, but also learn the methods of sorting out information, and subtly cultivate the spirit of inquiry, innovation, unity and cooperation.
In the meantime, please choose one of the following questions to complete.
1. Write a composition on the topic "Yellow River in My Heart", express your feelings for the Yellow River, and write your hopes and wishes for the Yellow River.
In view of the serious ecological crisis of the Yellow River cut-off and water pollution, please design a public service advertisement to appeal to people to protect the mother river. Advertising elements should include pictures or photographs, advertising words and design ideas. You can use hand-drawing or computer design to be creative.