At present, with the rapid development of the world economy, people pay more and more attention to environmental protection. But around us, there are still many phenomena of wasting and destroying water resources.
Activity purpose:
1, through activities, let students know about the lack of water resources and some water-related knowledge in China.
2. Understand the hard-won tap water and the urgency and importance of saving water.
3, master some water-saving tips, and can be publicized and applied in life.
4, through activities, improve students' ability of investigation and practice, as well as the ability to collect and process information.
5. Accumulate some idioms and public service advertisements related to water saving, and create several public service advertisements to improve Chinese literacy.
Activity level: Grade 5
Activity flow:
First, dialogue import
1, (showing the photos of the earth taken in space) Teacher: Looking at the earth from space, the surface of the earth appears charming blue, which is a display of water on the earth. There is water on the earth, which is one of the important characteristics that distinguish the earth from other planets in the solar system.
2. Is the water on the earth inexhaustible? (Show relevant pictures and written materials)
Our country has a large population, and the per capita water consumption is even less, which is about a quarter of the world's per capita, only about 2300 cubic meters. Among more than 660 cities in China, more than 400 cities are short of water, and 1 10 cities are seriously short of water. (Show chart)
4. What do you want to say after reading these materials?
(Health: Be sure to save water. )
5. exposure topic: save water.
Second, the "water saving" survey
1. However, in China, water resources are seriously wasted and the utilization efficiency is low. Students, please see:
(1) The national industrial water consumption per 10,000 yuan output value is 9 1 m3, which is more than 0/0 times that of developed countries.
(2) As long as families pay attention to getting rid of bad water habits (such as washing their faces or brushing their teeth, always leave the water on). ), they can save about 70% water.
(3) When irrigating farmland, the water lost along the way will generally account for 50%~60% of the water delivery.
2. Looking at these materials, what do you think?
(Health: It turns out that water has been wasted by us. )
3. Yes, how can we improve the utilization rate of water and reduce the waste of water? Let's do a life survey first.
4. (display):
Select a project for investigation and study, and reflect the results in the form of words or charts.
(1) As long as families pay attention to getting rid of bad water habits (such as washing their faces or brushing their teeth, always leave the water on, etc.). ), they can save about 70% water. Investigate, what other bad habits do families have to waste water?
(2) When irrigating farmland, the water lost along the way will generally account for 50%~60% of the water delivery. how
How can we improve the utilization rate of water and reduce the waste of water? You can visit experienced farmers or water conservancy technicians.
(3) Design water-saving research plan.
5. Students can freely form investigation and research groups to select and determine investigation items.
6. Each group discussed and designed the investigation and research scheme. (instructed by department patrol)
7. Each group exchanges and improves the investigation and research plan. (collective review)
8, after class, group investigation and research.
Third, talk about "saving water"
(A) my "water saving" survey.
1, "Household Water" Investigation Team
Student 1: There are 10 students in our group. According to the survey plan, each of us surveyed 10 households, and * * * collected and sorted out the water consumption of 100 households. Finally, a statistical chart is made. (display)
Health 2: From this picture, we can clearly find out the bad habits of wasting water in the family and their respective proportions.
Teacher: How did you come up with such a bar chart to show the research results?
S3: We asked our math teacher and he told us.
Teacher: It seems that in many cases, Chinese learning should be combined with other subjects such as mathematics.
Health 4: We also kept an activity diary. (Original reading)
Teacher: During the activity, if we can record the activity process, feelings and thoughts in time with a diary like this classmate, we can leave our most authentic and detailed activity track. As this classmate said, the tap water we use is not "spontaneous" but "hard-won"! Some are taken from hundreds of meters underground, and some are taken from rivers or reservoirs dozens or hundreds of kilometers away. They must be purified, precipitated and disinfected by the water plant ... how many procedures and people need to work hard!
Teacher: Do you know where the tap water we use here comes from?
Health: Taihu Lake.
Teacher: However, some time ago, serious cyanobacteria broke out in Taihu Lake. (Show pictures and text: On the evening of May 28th, the blue-green algae broke out in Taihu Lake, causing the tap water to stink, and there was a water supply crisis in Wuxi, which seriously affected the daily water consumption of urban residents! ) What do you want to say at this point?
Health: It is urgent to save water and protect water resources.
Teacher: Yes, we should keep in mind the old adage-(show the idiom: dripping water becomes a river, and dribs and drabs converge into a long stream of ocean water, thinking about its source).
Health: (Read these idioms)
2, "agricultural water" investigation team
Health 1: In fact, our group found that there are many ways to reduce water waste. (The lens shows all kinds of "water-saving" farmland irrigation maps, and introduces them while showing them: this is a faucet connected with water pipes, which regularly sprays water on farmland and waters crops; This is to pour water directly into the root of sugarcane through pipes, and only a small amount of water is needed to maintain the normal growth of sugarcane.
Teacher: Where did you get these photos?
Health 2: Some of these pictures were taken during the interview and some were downloaded from the Internet.
Teacher: Good. With photos, the method can be displayed intuitively.
Health 3: In order to fully understand the methods of farmland irrigation, we specially wrote to the technicians of Xibei Town Water Conservancy and Agricultural Machinery Station for advice. (showing the letter) In addition, I received their reply. (Reading reply)
Teacher: Good for you! Writing letters, although seemingly outdated, can explain the situation in detail and express feelings in words and words. I believe that your strong research enthusiasm must have touched the hearts of water conservancy technicians.
3. "Campus Water" Investigation Team
Student 1: Our group conducted a water survey in school after class, and found that the water consumption in our school is good, but there are also some phenomena of wasting water. We also made a situation table-(show it)
Statistics of Bad Water Use Habits in Bashi Experimental Primary School
bad habit
Account used for investigation
The proportion of people is too large. Forgot to tighten the tap and throw away the clean water you haven't finished drinking. The canteen wastes water and the toilet tank flushes too much water.
50% 10%20% 10% 10%
Teacher: Through investigation, we found that many people didn't notice a small faucet. What a pity!
Student 2: Yes, we have written a proposal to solve these problems and distributed it to all classes. (This proposal)
Health 3: We also put forward suggestions to the general affairs department of the school, asking them to adjust the water used in toilets and strictly supervise and manage the water used in canteens.
Teacher: Your activities are very effective. When problems are found, they can be solved immediately.
Summary: Just now you reported the investigation in the previous stage, and you can see that everyone gained a lot in the activity. Then let's enter the "knowledge first".
(B) "water saving" knowledge answer. Show the questions one by one, and the students answer them first. )
1, the water in the human body accounts for about the weight.
a、45% B、60% C、85%
2. In connection with World Water Day, China has designated the week where it is located as "China Water Week", with specific publicity themes every year.
A, March 22nd b, May 22nd c, July 22nd
3. In many places, the water package fee system is implemented, that is, no matter how many people and how much water is used, every household pays the same amount of water fee. Such a charging system.
A, simple, and worth popularizing. B, it is unscientific and unreasonable to cause serious waste of water resources. C, it is still feasible. The water price is relatively cheap, so why haggle over every ounce.
Fourth, I contribute to "saving water"
Teacher: What can we do to save water?
Health 1: We should start from ourselves and always pay attention to saving water in our daily life.
Teacher: Yes, if everyone can start from himself, the world will be a better place.
Health 2: We should also publicize the urgency of saving water to others.
Teacher: It is necessary. In fact, in our life, there are some tips that can help us save a lot of water resources. Please have a look-
(A) my "water saving" tips
1 (playing video) One day, my father found a brick from the outside and was carefully stuffing it into the toilet tank. ...
2. Are there any similar water-saving tips in life?
3. Student communication:
Health 1: Many people are used to washing their faces with tap water, thinking it is convenient and hygienic. In fact, as long as the washbasin is cleaned regularly, it is recommended to wash your face with the washbasin. Brush your teeth too. Many people are used to brushing their teeth while running tap water. This continuous drainage for 30 seconds, the water consumption is about six liters. If the tap is on for 5 minutes, 60 liters will be wasted.
Health 2: Don't leave the shower nozzle on all the time when taking a bath, and turn off the water in time when taking a bath. When the head and feet are wet, turn off the nozzle, wipe it with soap or bath, and rinse it off at one time. Don't fill the bathtub with bath water, one-third to one-quarter basin is enough.
Hygiene 3: oil stains on cookware and tableware should be wiped off with paper before washing; When washing vegetables and fruits, control the flow of the faucet and change the uninterrupted washing into intermittent washing. After the family finished eating, they washed all the dishes and chopsticks immediately. In fact, at present, the commonly used vegetable pots at home are all stuffed. Plug in the plug, put in water, pour in detergent, then wash all the dishes at once, and then rinse them with water together.
Health 4: ...
(B) my "water saving" public service advertisement
Transition: Just now, everyone mentioned propaganda. In fact, in order to improve the public's awareness of water conservation, our country often plays some public service advertisements on TV, radio and other media. Please have a look-
1. The video shows several public service advertisements:
(1) Water is the source of life, the lifeblood of agriculture and the blood of industry.
(2) Cherish water resources as you care for your eyes.
(3) If human beings don't cherish water, the last drop of water on the earth will be human tears.
Students read these public service advertisements aloud.
3. Can you try to make up several such public service advertisements? (Written by students)
4. communication:
Health 1: Protect water resources and make life last forever.
Health 2: Save water and start from a little bit.
Health 3: Now, human beings are thirsty and have water to drink. What will happen if the earth lacks water in the future?
Life 4: Cherish the source of life and turn it off bit by bit.
……
Five, after-school exercises
Water is the source of life, and human survival and development cannot be separated from water. After class, please introduce and publicize these "water saving" tips and public service advertisements to your parents, relatives and friends, so that more people can know how to save water. Let our earth always have water of life!
Activity evaluation and reflection:
In this activity, students really realized the preciousness of water resources and the urgency of saving water through investigation, research and communication, and learned some tips on saving water. At the same time, during the activity, students comprehensively used the knowledge and ability of Chinese, mathematics, science, comprehensive practice and other courses to carry out investigation and research, and their ability to collect and process information was improved, and their Chinese literacy such as listening, speaking, reading and writing was comprehensively improved.
I'll save water first (for example)
Next: Saving Water (Comprehensive Chinese Learning)