1. Use dots to explain the following meanings.
(1) Only with deep roots can it flourish. (From top to bottom, the longitudinal distance is large)
This cave is very deep. (From the outside to the inside, the lateral distance is large)
This kind of cloth is very dark. (strong color)
2. Sentence training.
if
Peel off the bark and the tree won't get food.
as soon as...
Will die.
if
Take exercise as dispensable, and your body can't get exercise.
You can't work and study better.
3. Write the sentences they see.
Exodus: When the trunk is broken, the tree will produce many side branches, which are neither beautiful nor useful.
If the body is decomposed, people will not have enough strength and spirit, neither can they live healthily and happily, nor can they better serve and contribute to society.
4. Find a phrase that can summarize the main content from the short passage and make a fuss on this basis.
If you plant trees, you should love them.
5. On the horizontal lines of the second, third, fourth and fifth paragraphs, add a central sentence that can summarize the content of this paragraph.
Water it often.
Don't shake.
Take care of Buck.
Protect the trunk.
6. Question and answer: Why do you say "trees are afraid of peeling"?
Because there are many small tubes conveying nutrients in bark, it is called "sieve tube". If the bark is stripped, the tree will die without nutrition. In addition, if the bark is broken, bacteria will invade the tree and the tree will get sick.
7. How can we guarantee to plant one or one new young tree?
Newly planted young trees should be watered frequently, not shaken, and the bark and trunk should be protected. In order to ensure that one species lives.
2. Information about caring for flowers, trees and protecting the environment
Case: Take care of flowers and trees.
Before class, I assigned the students the task of collecting the benefits and special functions of flowers and trees to human beings.
It is understood that many students have flowers at home, and there are many kinds of flowers and trees on campus, on streets and in communities. So, I instruct students to observe the plants around them, understand the characteristics and functions of their favorite flowers and trees, draw their favorite plants, write down the knowledge and information they have learned and make a beautiful card.
During the investigation, I found that Zhang Yuhan, a student in Class 2, Grade 2, Senior High School, not only painted flowers vividly, but also clearly described their varieties, places of origin, habits and characteristics. As soon as I learned, it turned out that her parents opened a big flower shop in the flower, bird, fish and insect market next to the school. Impressed, the children not only became more and more interested in flowers and plants, but also learned a lot of knowledge. With this information, I had a brainwave. Why not take students on a field trip? So, during the activity class, a group of 365,438+0 teachers and students came to the flower shop.
Seeing so many beautiful flowers at once, the students were so excited that they could not help but admire: how beautiful! It smells good! How beautiful! ..... I asked the small host Zhang Yuhan to introduce them one by one, and the students listened with relish. Then, I let the students observe and know all kinds of flowers and trees in their favorite way, and tell them what they found. At this time, the students can be said to be "zero distance" from the flowers. The freshness, elegance, delicacy and gentleness of flowers make everyone's heart full of pity and emotion. At this time, there is no need for the teacher to remind them: don't touch! Don't break it. These words are superfluous.
After returning to school, I encourage you to understand the benefits of flowers and trees to human beings by reading books, reading newspapers, watching TV or surfing the Internet, and bring relevant books and written materials recorded by yourself to the school to communicate with your classmates.
In class, the students are very active. Kan Kan talked about the benefits of flowers and trees. This shows that flowers and trees can beautify life, absorb noise, prevent wind and fix sand and create wealth for mankind. Some students also explained the ability of flowers and trees to purify the air in combination with the Chinese lesson "Clouds that don't want to land" ... At this time, they can realize that students go deep into life and collect and sort out information.
At this time, a classmate said, "I have a potted flower." It's not very expensive, but it's my own. The first thing to do when I go home every day is to look at this potted flower. Is it time to water? " Is it time to loosen the soil? Mom says I have a sense of responsibility in raising flowers. I think this should also be regarded as the benefit brought by flowers and trees, so I will take good care of it. "I immediately affirmed his opinion, which suddenly opened the students' minds. Everyone is talking about it. Some people say that flowers and trees can give people a good feeling and make people's hearts beautiful. Some say that sending flowers to friends can enhance feelings; Some people say that people in a bad mood can be happy when they see beautiful flowers and trees; ..... All kinds of answers came into being, and I couldn't help being stunned by their imagination. Another student stood up and said, "I think I am very kind." When I visited that day, I saw the petals so tender and the leaves so green. I thought of a small flower, a grass and life, so I should cherish it. " Hearing this, I really sigh that students can think so widely and so far. They got rid of egoism and raised the principle of caring for flowers and trees to respect and awe for life, which made people sincerely admire their innovative thinking.
Through this lesson, I deeply feel that life is a big classroom. Teachers can only succeed if they choose appropriate educational opportunities, organize appropriate educational resources and improve their innovative spirit and practical ability on the premise of students' acceptance.
3. Green tips
Some scholars abroad have calculated the ecological value of trees: the cumulative value of a 50-year-old tree is about196,000 USD.
Whether this calculation is accurate or not is obvious from the practical value of trees. A tree can produce 200 kilograms of pulp. If these pulps are to produce toilet paper, there must be at least 750 rolls100g of toilet paper.
In the city, a tree can store the pollutants emitted by a car driving for one year 16 km. Many trees can absorb harmful gases, such as 1 hectare Cryptomeria fortunei forest, and can absorb 60 kilograms of sulfur dioxide every day. Others, such as Ailanthus altissima, oleander, Ginkgo biloba, Sycamore, etc., all have the function of absorbing sulfur dioxide.
When the urban green area reaches more than 50%, the pollutants in the atmosphere can be effectively controlled. Urban forests can increase air humidity, and an adult tree can evaporate 400 kilograms of water a day, so the air humidity in forests is obviously increased.
According to calculation, the local summer temperature can be reduced by 0. 1% for every increase in urban green area. Urban forest belts and hedges can reduce noise.
A 30-meter-wide forest belt can reduce noise by 6-8 decibels. There are 3.5 bacteria per cubic meter of air in forest areas, while there are 34,000 densely populated cities lacking greening.
Urban streets with trees contain about 80% less bacteria than urban streets without trees. Urban shelterbelt can slow down the wind speed, and its effective range is less than 40 times of the tree height, and the best effect is in the range of 10~20 times, which can reduce the wind speed by 50%.
In farmland forest network, wind speed usually slows down by 30%~40%, relative humidity increases by 5%~ 15%, and soil water content increases by 10%~20%. According to the measurement, the canopy can intercept about 20% precipitation, which greatly weakens the influence of raindrops. As long as there is litter with a thickness of 1 cm on the surface, the surface runoff can be reduced to less than 1/4 of the bare land, and the sediment can be reduced to less than 7% of the bare land.
Compared with bare land, a hectare of woodland can store at least 3000 cubic meters more water. The storage capacity of 1 10,000 mu of forest is equivalent to a reservoir with storage capacity of 1 10,000 cubic meters, and the construction of such a reservoir requires an investment of more than10,000 million yuan.
Some experts predict that if forests are lost on the earth, about 4.5 million biological species will cease to exist, 90% of fresh water on land will flow into the sea in vain, and human beings will face serious water shortage. The loss of forests will increase the wind speed in many areas by 60%~80%, and hundreds of millions of people will be killed by wind disasters.
4. Ask about 300 words for information about caring for flowers and trees.
The earth is the only home for human beings, and green life is the main body of our home.
Without flowers and trees, how can the air be moist and fresh? Without flowers and trees, how can you feel the flowers and birds? Planting a tree and caring for every grass and tree can dye an oasis of life. Only the beautiful phoenix tree can attract golden phoenix! Only a green home can shelter the vigorous growth of life.
Our life is changing with each passing day. When campus greening and beautification directly affects our study and life and becomes an inseparable part, caring for and protecting the environment will become a healthy and upward attitude and lifestyle. Creating a green environment requires not only a beautiful hardware environment, but also good self-cultivation and quality, and the enthusiasm and seriousness of all teachers and students.
We shouldn't spit everywhere, and we shouldn't throw away garbage such as food packaging. Starting with saving every drop of water and cherishing every tree; Starting from caring for flowers and greening the environment. Everyone strives to be an angel to protect the green and care for the clean environment. Start with me and use your own practical actions to influence people around you.
In order to provide a clean, warm and healthy learning and living environment for ourselves, the school proposes the following initiatives to all teachers and students: 1. Establish the concept of green civilization, consciously care about the living environment, abide by environmental laws and regulations, and regard personal environmental protection behavior as an organic part of personal civilization cultivation; 2. Take care of campus greening, take immediate action, care for, support and actively participate in the construction and management of campus greening, take care of flowers, trees and facilities, and dare to stop and report acts that damage greening facilities. Third, develop good hygiene habits, and do not throw fruits, skins, cigarette butts, food packaging, etc. Feel free and don't spit everywhere.
Reach out your hand, pick up a piece of waste paper, a waste plastic bag and a cigarette butt on the ground, and give your love to the cleanliness of the campus. Four, support and participate in the recycling of waste paper, waste plastics, scrap metal, as far as possible to reduce domestic garbage.
5. Abide by public morality, advocate civilization, maintain public order, care for public health, protect the health of oneself and others, advocate harmony between teachers and students, friendship among classmates, civilized language and code of conduct, and build a harmonious and civilized campus. Teachers and students, "don't do it with small good, don't do it with small evil"; Every grass and tree shows spring scenery, and every move shows character; Flowers are red and willow green, the country is highly respected and beautiful; An oasis, a poem, a hope.
Students! Let's start with the little things around us, and start with me to make our campus more beautiful and our home more warm and elegant. Pupils like flowers and plants. Tips: feet don't run around, flowers smile slightly.
Let Xiao Shu grow up happily with us! The school belongs to you, and the green color belongs to you. Green plants are our babies, and babies need us to love them.
Do you love life? Please take care of beautiful flowers and plants! How beautiful the green grass is, the children's behavior is more beautiful. Please take good care of flowers and trees, it will give you green life! May green be with us! How lovely the little flower is. Please don't hurt it.
For your health and mine, please take good care of the trees. Flowers and plants are smiling, please don't hurt her; Your concern makes me more beautiful; Give me a space to show my beauty; One less footprint, one more green space; The flowers and plants are tender, please don't climb; Your civilization nourishes my life; No footprints, no garbage.
Take care of the grass under your feet and don't fold the flowers. The grass smiles slightly, please walk around.
5. Who has environmental protection knowledge about trees?
Four benefits
1. Trees can regulate climate and keep ecological balance. Through photosynthesis, trees inhale carbon dioxide and exhale oxygen, making the air clean and fresh. An acre of forest releases enough oxygen for 65 people to breathe.
2. Trees can prevent wind and fix sand, keep water and soil, and absorb all kinds of dust. An acre of forest can absorb 20-60 tons of dust a year.
3. Forests can reduce noise pollution. A 40-meter-wide forest belt can reduce noise 10- 15 decibels.
The secretions of trees can kill bacteria. There are 34,000 bacteria per cubic meter of air in the open space, while there are only 3,400 bacteria in the forest.
Planting trees is the obligation of every citizen, and the state has designated March 12 as Arbor Day. Planting trees is of great benefit to our study, work and life.
Afforestation can purify the air, beautify the environment and green the motherland. It can also make oxygen in the carbon dioxide exhaled by people for people to absorb and breathe. If a large number of trees are not planted, the oxygen on the earth will be difficult to meet the needs of human beings and all kinds of creatures.
Afforestation can also reduce noise. Noise pollution has caused great harm to human life, study, work and rest, and can be said to be people's "enemy". Therefore, we should pay more attention to afforestation. Noise can also lead to hearing loss, deafness and stupidity, as well as heart, blood pressure and nerve abnormalities in long-term life. Even, it can make people die under long-term noise. In this way, afforestation can reduce noise by four or five times.
Afforestation not only has very important environmental benefits for human survival, but also has great economic benefits for human production and life.
The unreasonable exploitation and utilization of natural resources by human beings is the main reason for ecological imbalance. Deforestation, deforestation, overgrazing, etc. It will destroy forests and grasslands, cause soil erosion and land desertification, and make sandstorms occur frequently. Unreasonable development and occupation of land make the cultivated land area decrease day by day.
Afforestation plays an important role in maintaining ecological balance, with the functions of producing oxygen, purifying air, conserving water, conserving soil and water, regulating climate, preventing wind and fixing sand, and eliminating noise. Now that we know so many benefits of afforestation, we should consciously fulfill the obligation of afforestation and lay the foundation for creating our beautiful home.
6. There is an urgent need for environmental knowledge about trees.
Reducing the felling of forest trees and sowing green is sowing hope. In learning, we should try our best to save stationery and put an end to waste. Pencils are made of wood, and wasting pencils is equivalent to destroying forests.
Take care of flowers and trees, do not destroy urban greening, and actively participate in greening and tree planting activities. The sharp decline of forests is an important part of the ecosystem on which human beings depend. There used to be 7.6 billion hectares of forest on the earth, but it has been reduced to 5.5 billion hectares in this century and to 2.8 billion hectares in 1976. Due to the growth of the world population, the demand for cultivated land, pasture and wood is increasing day by day, which leads to excessive deforestation and reclamation, causing unprecedented damage to forests. According to statistics, about120,000 hectares of forests disappear every year in the world, most of which are tropical rainforests that are crucial to the global ecological balance. The destruction of tropical rainforests mainly occurs in developing countries in tropical areas, especially in the Amazon region of Brazil. Amazon forest ranks first in the world's tropical rain forest, but by the early 1990s, the forest coverage in this area had decreased by 1 1%, equivalent to 700,000 square kilometers. On average, a forest the size of a football field disappears every five seconds. In addition, rainforests in the Asia-Pacific region and Africa are also being destroyed.
7. Green tips
Some scholars abroad have calculated the ecological value of trees: the cumulative value of a 50-year-old tree is about196,000 USD. Whether this calculation is accurate or not is obvious from the practical value of trees.
A tree can produce 200 kilograms of pulp. If these pulps are to produce toilet paper, there must be at least 750 rolls100g of toilet paper.
In the city, a tree can store the pollutants emitted by a car driving for one year 16 km. Many trees can absorb harmful gases, such as 1 hectare Cryptomeria fortunei forest, and can absorb 60 kilograms of sulfur dioxide every day. Others, such as Ailanthus altissima, oleander, Ginkgo biloba, Sycamore, etc., all have the function of absorbing sulfur dioxide. When the urban green area reaches more than 50%, the pollutants in the atmosphere can be effectively controlled.
Urban forests can increase air humidity, and an adult tree can evaporate 400 kilograms of water a day, so the air humidity in forests is obviously increased. According to calculation, the local summer temperature can be reduced by 0. 1% for every increase in urban green area.
Urban forest belts and hedges can reduce noise. A 30-meter-wide forest belt can reduce noise by 6-8 decibels.
There are 3.5 bacteria per cubic meter of air in forest areas, while there are 34,000 densely populated cities lacking greening. Urban streets with trees contain about 80% less bacteria than urban streets without trees.
Urban shelterbelt can slow down the wind speed, and its effective range is less than 40 times of the tree height, and the best effect is in the range of 10~20 times, which can reduce the wind speed by 50%.
In farmland forest network, wind speed usually slows down by 30%~40%, relative humidity increases by 5%~ 15%, and soil water content increases by 10%~20%. According to the measurement, the canopy can intercept about 20% precipitation, which greatly weakens the influence of raindrops. As long as there is litter with a thickness of 1 cm on the surface, the surface runoff can be reduced to less than 1/4 of the bare land, and the sediment can be reduced to less than 7% of the bare land.
Compared with bare land, a hectare of woodland can store at least 3000 cubic meters more water. The storage capacity of 1 10,000 mu of forest is equivalent to a reservoir with storage capacity of 1 10,000 cubic meters, and the construction of such a reservoir requires an investment of more than10,000 million yuan.
Some experts predict that if forests are lost on the earth, about 4.5 million biological species will cease to exist, 90% of fresh water on land will flow into the sea in vain, and human beings will face serious water shortage. The loss of forests has increased the wind speed in many areas by 60%~80%, and hundreds of millions of people will be killed by this wind disaster. ...
8. Who has environmental protection knowledge about trees?
1. I believe everyone wants to spend their old age in a good living environment! If you want to create a good living environment for yourself and others, you should pay attention to the life around you.
Due to the poor environmental protection and sanitation in the world, these are manifested in the treatment of domestic garbage, which will bring environmental pollution to human beings. So I sincerely make the following suggestions: 1. Don't litter and spit. 2. Save paper: printing paper is used as draft paper; Print on the back of the printing paper.
3. Contribute to environmental protection: all kinds of flowers and trees. 4. Take care of your surroundings.
5. Turn off the water or power supply in time. I know that these small measures are not enough to represent my patriotism, so I decided to write more proposals for my motherland. I hope you can accept my opinion, and I hope more people will be patriotic.
From now on, start from me, don't litter, don't spit everywhere, and be a good example for young master. From now on, from me, wherever I go, I will not litter, spit, be a small guest and not be teased.
Let's take action, starting from me and starting now. In the new century, we are eager for a beautiful earth, a green home, a blue sky and fresh air.
However, due to human wanton destruction, pollution and waste, the earth has become riddled with holes. Mankind has been punished by nature and gradually realized the importance of environmental protection.
In my hometown of Luchuan, a Kyushu River runs through the county seat. According to the old man, in the past, the water in the Kyushu River was crystal clear, and hot springs kept pouring out from the beaches along the river, attracting tourists from all directions. In summer, people often go swimming in rivers.
Now, Kyushu River has become a "sewage river". The river is muddy and smelly. All kinds of garbage float on the river, and the number of hot springs is greatly reduced. It needs a pump to pump it up. People dare not swim in the river anymore.
Isn't this the result of people destroying the environment? We should learn lessons, protect the environment, clean the environment and beautify the environment, starting from me, starting from now, for the earth, for the future of mankind, and for us to have a beautiful living environment forever. I sincerely send you the following proposal: 1. * * * Let's build a "conservation-oriented society", saving a drop of water, saving electricity and saving a piece of paper. Save water, tighten the faucet in time after use, avoid opening it, and advocate washing hands and faces with washbasin; Save electricity, turn off the power supply when electrical appliances are not in use; Save paper, use handkerchiefs and rags, and try to use paper on both sides.
2. In order to reduce air pollution and save energy, try to use public transportation, bicycles or walking. 3. In order to protect natural resources such as forests and minerals, try to buy commodities made of renewable materials that can be used for many times and for a long time; Reduce the use of disposable paper cups, disposable wooden chopsticks and lunch boxes.
Reduce the use of plastic bags, which are the culprit of white pollution. Developing economy should not be at the expense of destroying the environment, but should be placed in the same position as protecting the environment.
6. Strengthen environmental publicity and education, cultivate environmental awareness from an early age, and actively participate in environmental protection activities. 7. Consciously protect the ecological environment and actively participate in greening and beautifying activities.
There is only one earth, and her life is fragile. We can't lack "degree" because of our rampant behavior, for the sake of immediate development and small interests, and make our already fragile body more fragile! Remember, protecting the earth means protecting ourselves! I care about campus environmental protection: I am willing to actively participate in school environmental protection activities and maintain the campus environment. Second, to achieve a balanced diet: I want a balanced diet, advocate drinking boiled water, and avoid eating packaged drinks and snacks.
Third, save water and electricity: I will save water and form a good habit of turning off the lights. Fourth, be a green consumer: I advocate green consumption, bring my own lunch tableware and reduce the use of disposable tableware.
Verb (abbreviation for verb) Shopping with your own shopping bag: I would like to shop with my own shopping bag and use less plastic bags or products that are over-packaged and difficult to recycle. Sixth, public transportation is good: I am willing to use public transportation.
Seven, * * pollution small ads: I am willing to * * spam ads, and will not post posters to advertise pollution. Eight, etiquette, environmental protection, quiet: I want to tell my parents to worship their ancestors on the first day of the New Year, use less paper bags and firecrackers, and don't make noise pollution.
9. Treat animals and plants with love: I will refuse to eat, buy or raise wild animals and plants and products, and care for flowers and trees. X. Green leisure is beautiful: I would like to advocate green leisure life and reduce the load of the natural environment.
Start from yourself, start from your side, please put your garbage into the sorting bucket in turn; Tree resources in China is extremely scarce. To protect tree resources, please reduce the use of disposable chopsticks. Please turn off the tap consciously when you leave the bathroom, and turn off the lights when you leave the room. Please put your used waste batteries into the nearest battery recycling box, and don't let them sleep in the soil; Protecting the environment is everyone's responsibility. Protecting the environment means protecting yourself. Do you love yourself? Although today's developed earth environment looks optimistic, there are very serious hidden dangers, which are all man-made: cutting down trees at will, setting up chemical plants, and discharging harmful liquids at will. "The annual emissions of gases that pose a greater threat to mankind in the world exceed 600 million tons ...; It is estimated that by the middle of the next century, one third of the earth's surface will be in danger of desertification, and 6 square kilometers of land will be desertification every year, threatening more than 60 countries ... "What do people think of these shocking figures? From 23 million years ago to the appearance of forest apes180 thousand years ago, and then to the highly developed civilization era of human beings, nature has always been "responsive" to everyone, which has further bred human greed.
For example, the Mulan River in China was originally a crystal clear river in the early 1950s, but now it has become a polluted river, and fish and shrimps have disappeared, adding another scar to our mother earth. Isn't this a wake-up call for mankind? Therefore, I solemnly suggest to those who haven't realized it: First, if human beings want to conquer the terrible nature, they must respect it.
We should be cautious in transforming nature, but we should also be bold, brave in practice and brave in improvement.