1. Natural safety tips

Knowledge of natural safety 1. Small knowledge of saving water and protecting harsh environment. Water-saving knowledge is beneficial to the present, and the merits are in the future. Here, we have collected the following water-saving tips for your reference: First, washing vegetables with rice washing water and then washing them with clear water can not only save water, but also effectively remove pesticide residues on vegetables; Second, wash the mop, mop the floor and then flush the toilet.

The second washing water for washing clothes cleans doors and windows, furniture, shoes and socks, etc. Third, flush the toilet after urinating, try not to open the big water pipe for flushing, and make full use of the used "dirty water"; 4. Sprinkle water on the indoor and outdoor ground in summer to cool down, try not to use clear water, and use washing water after washing; 5. When cleaning bicycles and family cars, don't wash them with water, but wipe them with a wet cloth. If it is too dirty, wash it with the water left over from washing clothes. Six, special car wash, should establish recycling water facilities; Seven, family watering flowers, appropriate use Taomi water, tea, laundry water, etc. ; Eight, household washing towels, small objects, fruits and other small amounts of water. It is advisable to use a basin to hold water instead of turning on the tap to flush; Nine, factories, enterprises, production water, advocate the use of recycling water, cooling water, filtered water, precipitation water recycling, repeated recycling; Ten, faucet used for a long time leaks. You can cut the rubber cover of the small penicillin bottle open to ensure no water leakage; 1 1. Adjust the floating ball in the toilet water tank down by 2 cm, saving nearly 3 kg of water each time; If you use it four times a day at home, you can save 4380kg of medicine a year.

Twelve, washing vegetables: a pot of a pot, do not run the faucet, a meal can save 50kg；; 13. Shower: If you turn off the tap to wipe soap, you can save 60kg of water by taking a shower; 14. Hand-washing clothes: If you use the washbasin to wash clothes, you will save 200kg of water each time compared with turning on the tap; 15. Washing clothes with a washing machine: I suggest you fill a bucket before washing. If washed twice separately, it will consume120kg; More water. Sixteen, car washing: scrubbing with a rag can save at least 400kg. Compared with washing with a faucet, the water consumption is much less each time; 17. flushing toilets: if water-saving equipment is used, 4-5 kilograms of water can be saved each time; 18. floor washing: scrubbing with a mop can save more than 200 kilograms of water than washing each household with a faucet; 19. Reuse of domestic water: The new device is equipped with a two-way valve switch, through which reusable water is stored in the water tank for standby, and the water that cannot be reused or the water tank is directly discharged into the sewer after it is filled. Environmental protection knowledge environment is the place where human beings carry out production and life activities, and it is the material basis for human survival and development.

Major environmental problems: mainly refer to earthquakes, floods, droughts, typhoons, collapses, landslides, mudslides, endemic diseases caused by poor regional natural environment quality, etc. Secondary environmental problems: mainly lead to environmental pollution and environmental destruction.

Environmental carrying capacity: also known as environmental carrying capacity or environmental endurance. Earth's atmosphere: the layer of air surrounding the outside of the earth.

From low to high, it can be divided into troposphere, stratosphere, mesosphere, ionosphere and escape layer The thickness of the atmosphere is about 2000-3000 kilometers.

The formation of the biosphere is the result of long-term interaction between the biological world and the hydrosphere, atmosphere and lithosphere. The source of pollutants that cause environmental pollution usually refers to places, equipment, devices or human bodies that discharge harmful substances or have harmful effects on the environment.

According to attributes, it can be divided into natural pollution sources and man-made pollution sources. The main sources of environmental pollution are industrial "three wastes", industrial wastewater, industrial waste gas environment and industrial waste residue.

Acid rain is also a global environmental problem. Acid rain refers to rainfall with PH less than 5.6, and its harm mainly lies in: making the water quality of lakes sour and endangering fish; Acidify the soil and harm crops; Causing corrosion damage to buildings and cultural relics; It may also endanger human health. The main pollutant causing acid rain is sulfur dioxide.

Noise refers to the sound with irregular and chaotic changes in sound intensity and frequency. From a biological point of view, as long as it is annoying and unwelcome, it can be regarded as noise.

Ozone is an allotrope of oxygen, an unstable gas with a special "fresh" smell. Carbon monoxide, hydrocarbons, nitrogen oxides, lead compounds and carbon particles are the most harmful to people.

Heavy metal pollution mainly refers to environmental pollution caused by mercury, cadmium, lead and chromium. Soil pollution refers to the phenomenon that pollutants produced by human activities enter the soil through various channels, which leads to the imbalance of soil natural functions and the deterioration of soil quality.

It is generally believed that the unwanted or worthless sound is noise. Noise pollution is harmful to people.

Public nuisance is a regional disease caused by environmental pollution. War is a killer that destroys the living environment of mankind.

Forest ecosystem refers to the terrestrial ecological environment with forests as the main producers. Nature reserve.

In order to protect the natural environment and natural resources and promote the sustainable development of the national economy, the state, with the approval of people's governments at all levels, divides a certain area of land and water into special protection and management areas. There are three types of nature reserves.

1 natural ecosystem nature reserve; 2 wildlife nature reserve; 3 Natural Heritage Nature Reserve. Eco-city.

An ideal urban model is characterized by the full integration of science and technology with nature, the maximum display of human creativity and productivity, the maximum protection of residents' physical and mental health and environmental quality, the high utilization of materials, energy and information, and a virtuous ecological cycle. Renewable resources.

Natural resources that human beings can regenerate and reuse through natural activities or artificial activities. Such as soil, plants, animals, microorganisms and various natural biological communities, forests, grasslands, aquatic organisms and so on.

Non-renewable resources. Natural resources that cannot be regenerated for a long time after human development and utilization.

Mainly refers to all kinds of minerals, rocks and fossil fuels in nature, such as peat and coal. Mainly refers to all kinds of minerals, rocks and fossil fuels in nature, such as peat, coal, oil, natural gas, metal minerals, non-metal minerals and so on.

The total amount of fresh water resources in China is 272,654.38 billion cubic meters, which is one of the 13 water-poor countries in the world. Protect groundwater.

Forest coverage. The horizontal area of forest in unit land area.

2. Knowledge about nature 1 A very strange small gas analyzer, which was successfully copied from annoying flies. It has been installed in the cockpit of the spacecraft to detect the composition of the gas in the cabin.

2。 From fireflies to artificial luminescence;

3。 Electric fish and volt batteries;

4。 The windward ear of jellyfish imitates the structure and function of jellyfish ear, and designs a storm predictor of jellyfish ear, which can predict the storm 15 hours in advance, which is of great significance to navigation and fishery safety.

5。 According to the visual principle of frog eye, people have successfully developed an electronic frog eye. This kind of electronic frog's eyes can accurately identify objects with specific shapes like real frog's eyes. After installing electronic frog eyes in radar system, the anti-jamming ability of radar is greatly improved. This radar system can quickly and accurately identify aircraft, ships and missiles with specific shapes. In particular, it can distinguish between true and false missiles and prevent false confusion.

Electronic frog eyes are also widely used in airports and traffic arteries. At the airport, it can monitor the take-off and landing of aircraft, and call the police in time if it is found that the aircraft is about to collide. On the main road, you can direct the vehicles to prevent them from colliding.

6。 According to the principle of bat ultrasonic locator, people also copied "Pathfinder" for the blind. This pathfinder is equipped with an ultrasonic transmitter, which blind people can use to find telephone poles, steps, people on bridges, etc. Nowadays, "ultrasonic glasses" with similar functions have also been made.

7。 By simulating the incomplete photosynthetic mechanism of cyanobacteria, a bionic photolysis device was designed to obtain a large amount of hydrogen.

8。 According to the study of human skeletal muscle system and bioelectricity control, a human strength enhancer-walking machine is copied.

9。 The hook of modern crane originated from the claws of many animals.

10。 Corrugated roofs imitate animal scales.

1 1。 Paddles imitate the fins of fish.

12。 Saw mantis arms, or saw grass.

3. Environmental protection and safety knowledge and environmental protection

Environmental protection industry is a variety of production and business activities aimed at preventing pollution and improving the environment.

environmental safety

People began to use the term environmental safety because the environmental pollution and destruction associated with production technology activities have all kinds of harmful effects on people's health. At this time, the environmental safety problem mainly refers to the harmful effects of environmental pollution and destruction on people's health, that is, the safety of environmental problems on people's physical and mental health; This kind of environmental security still refers to people's health and safety, not to environmental security, and the environment is just an intermediate that transmits unsafe effects to people. With the increasingly serious problem of environmental resources and the deepening of people's understanding of environmental resources, some environmental science experts and environmental protection organizations have begun to give environmental safety a new meaning different from traditional labor safety and health safety, that is, they first regard environmental safety as a harmful influence on the environment or nature, and at the same time confirm that environmental safety is also a harmful influence on people's health. In this way, environmental safety has become a new concept of safety, which is both related and different from the original labor safety and health safety. Of course, this kind of environmental security generally belongs to the category of technical security.

4. Safety tips 10 1. What things in life can cause throat to get stuck?

(1) Fighting with food in their mouths, running and jumping.

(2) When doing homework. Always put pen caps, pins, etc. In your mouth.

(3) When eating snacks, throw the food out and open your mouth to pick it up.

(4) Laugh while eating.

(5) When eating fish.

2. What should I do if I am bitten by a puppy while playing with it?

(6) Wash the wound carefully and thoroughly immediately, and rinse it with running water for more than 20 minutes.

(7) Ligate the upper end of the wound (near the heart end) with a cloth belt to prevent blood from flowing back. Don't cover the wound.

(8) Send to the hospital quickly and timely, and inject rabies vaccine and tetanus vaccine.

3. What should I do if my classmates faint from heatstroke?

(9) Take him to the infirmary immediately and find the school doctor.

(10) Help him to the shade, loosen the button, cold compress his neck with a towel, and replenish water in time.

5. What is the safety knowledge? First of all, walking instructions.

1, pedestrians must take the sidewalk, and those without sidewalks must take the roadside;

2. Pedestrians are not allowed to chase and run in the roadway, and they are not allowed to suddenly turn and cross when the vehicle approaches;

3, are not allowed to pick up the car on the road, chasing the car, are not allowed to forcibly pulled up or parabolic hit the car;

4, are not allowed to play on the road, frolicking;

5. Preschool children must be led by adults when walking on streets or highways;

Second, the travel instructions

1, vehicles are not allowed to call in the middle of the road;

2, motor vehicles are not allowed to be any part of the body out of the window; 3, when riding, are not allowed to stand, not allowed to eat in the car;

4. Don't get on or off by force, get off first and then get on, wait in line and get on in order; After getting off the bus, wait for the vehicle to leave. If you want to cross the road, you must walk safely.

5. Do not take overloaded vehicles or vehicles without passenger and sports licenses;

Third, riding instructions.

1, children under the age of twelve are not allowed to ride bicycles or tricycles on the road;

2. Before turning, slow down, turn around, reach out and don't turn suddenly;

3. Hands are not allowed to leave the handle and climb other vehicles or objects;

4. Vehicles are not allowed to drive in parallel, chase each other or meander;

5. Always check the performance of the car. You can't ride a bike when there is something wrong with its bell, brakes or other parts. You should repair it in time.

6, no umbrellas, no cycling with people;

7, are not allowed to learn to ride a bike on the road;

8, are not allowed to park in the driveway or compete with motor vehicles;

Emergency treatment

Going up and down stairs, safety first; Don't chase or crowd.

Rough play, dangerous game; Life is precious, so cherish it.

Cross the aisle, not crowded; Do exercises and pay special attention.

Don't chase, don't make trouble, don't worry; Drive slowly on the right and be safe.

6. Nature's boats and submarines come from people's imitation of fish and dolphins.

Scientists have made the first batch of gas masks in the world according to the unique drug detection ability of wild boar nose. The rocket takes off by using the recoil principle of jellyfish and squid.

Researchers have developed many military camouflage equipment for the army by studying the chameleon's color-changing ability. Scientists studied frog eyes and invented electronic frog eyes.

The US Air Force has developed a miniature thermal sensor through the "hot eye" function of poisonous snakes. Humans also used the principle of leapfrog to design a toad ram (hang).

Humans imitate the highly sensitive sense of smell of police dogs and create "electronic police dogs" for investigation. Nature is beautiful, we should protect it, it gives us so much inspiration, we should not destroy it.

Scientists invented the plane that human beings dreamed of, but sometimes it became people's troubles: the plane crashed and people died, and the wing of the plane was broken! Why is this? In fact, dragonflies have already solved this problem. Dragonflies have a black spot at the end of their wings, which is a little heavier than the wings themselves. This point is used to stabilize the vibration of the wing. If scientists had known this, there would have been fewer accidents! Compared with a sharp boat, a whale with a round head will say that the boat is fast, but it is actually much faster than a whale, because engineers find that the whale's shape is extremely ideal-streamlined! What a revelation nature has given us.

7. Safety tips 10 1. What things in life can cause throat to get stuck? (1) Fighting with food in their mouths, running and jumping.

(2) When doing homework. Always put pen caps, pins, etc. In your mouth.

(3) When eating snacks, throw the food out and open your mouth to pick it up. (4) Laugh while eating.

(5) When eating fish. 2. What should I do if I am bitten by a puppy while playing with it? (6) Wash the wound carefully and thoroughly immediately, and rinse it with running water for more than 20 minutes.

(7) Ligate the upper end of the wound (near the heart end) with a cloth belt to prevent blood from flowing back. Don't cover the wound.

(8) Send to the hospital quickly and timely, and inject rabies vaccine and tetanus vaccine. 3. What should I do if my classmates faint from heatstroke? (9) Take him to the infirmary immediately and find the school doctor.

(10) Help him to the shade, loosen the button, cold compress his neck with a towel, and replenish water in time.

8. What are the natural science knowledge? 1. Basic knowledge of electricity: 1. The electricity generated by the power plant and sent to residents' homes through wires is 220V alternating current.

This amount of electricity is enough to cause an electric shock accident and cause death. High voltage is higher than 5500 volts.

The voltage of dry battery is1.5v2. Electricity can be divided into two categories: there is no danger of electric shock and there is danger of electric shock.

3. Don't hide under a tree when encountering a thunderstorm outdoors, let alone under a lonely tree. Trees are vulnerable to lightning.

Stay away from high-voltage lines, iron towers and substations. Electricity in these places is more dangerous.

High-voltage electricity above 5500V can shock people within a certain distance, resulting in electric shock death. The wires and sockets at school and home are dangerous 220V electricity.

Don't use the electricity from these wire sockets for experiments. When the current flows through the filament, the light bulb will emit light.

5. One end of the dry battery is a copper cap, and the other end is a zinc shell. When these two ends of the battery are directly connected by wires, a short circuit will occur.

When short-circuited, the wires and batteries will become hot in an instant, not only the light bulb can't emit light, but also the wires will break down quickly. 6. The current flows from one end of the battery, passes through the bulb and returns to the other end of the battery to form a complete loop, and the bulb will emit light.

The small light bulb doesn't light up, which means there is no current in the light bulb. A current loop consisting of batteries, wires and bulbs is called a circuit.

7. We can't use the circuit detector in our laboratory to detect the household 220V circuit. 8. The circuit is out of order. We can use a circuit detector to detect what is wrong.

We can also use the replacement method to troubleshoot and make the light bulb light up. 9. A substance that can conduct current, such as copper wire, is called a conductor.

Substances that cannot pass current, such as plastic wrapped in wires, are called insulators. We use conductors to send electricity where people need it.

We use insulators to prevent current from reaching places where people don't want electricity. 1 1. Don't wipe with a wet cloth, and don't touch electrical appliances and switches with wet hands.

12, we should protect the insulator. 13, the switch is to control the on-off of current.

14. There are two methods for circuit connection: series connection and parallel connection. The household appliances in our family are generally connected in parallel.

The voltage of one battery is 1.5V, and the voltage of two batteries in series is 3v. Therefore, if the batteries are connected in series, the small light bulb will be brighter.

When two batteries are connected in parallel, the voltage is still 1.5V, so the light bulb will not be too bright.

15, the voltage in the circuit exceeds 1.5V marked on the small light bulb, and the light bulb will burn out if it is too bright. Second, the new life 1, rape and impatiens are composed of six parts: root, stem, leaf, flower, fruit and seed.

2. Rape flower consists of sepals, petals, stamens and pistils. 3. Rape belongs to Cruciferae and has 4 petals.

The flowers of most plants are composed of sepals, petals, stamens and pistils, and the flowers with four parts are called complete flowers. There are four broken flowers, these broken flowers are called broken flowers.

5, only stamens, flowers without stamens are male flowers. A flower with only pistils and no stamens is a female flower.

Flowers with stamens and pistils are bisexual. 6, flowering, fruiting, there are seeds in the fruit.

Flowers of plants undertake the task of producing seeds and reproducing new life. 7. Stamens are generally composed of two parts, the anther above and the filament below.

There are a lot of pollen hidden in anthers. Pistil generally consists of three parts.

There is a stigma above, a style in the middle and an ovary below. The stigma is sticky and can be stuck with pollen.

8. Stamens and pistils of plants. Pollen produced by stamens spreads to the stigma of pistil, fertilizing the ovule in the ovary of pistil.

After the ovule is fertilized, fruits and seeds begin to grow and flowers begin to wither. 9. Insect-borne flowers such as rape, which are pollinated by insects such as bees, are called insect-borne flowers.

10, there are seeds in the fruit of things; In the fruits of different plants, the number, size and shape of seeds are different. The number of seeds in the fruit of the same plant is also different.

165438+ chestnut rolling propagation; Dandelion spreads seeds by wind, as well as reeds, willows, maples and so on. Their seeds are light, winged or fluffy. Lotus, coconut, etc. Spread through water flow; Xanthium sibiricum is spread by animals. 12, seed germination needs enough water and air and suitable temperature.

13, the structure of broad bean seeds is divided into seed coat, embryo, radicle, cotyledon and other parts. The seed coat is the "armor" of the seed and plays a role in protecting the seed.

The germ develops into stems and leaves of plants; The radicle grows and becomes the root of the plant. Seed germination usually means that the radicle first breaks through the seed coat and grows downwards to form roots, and then the germ breaks through the seed coat and grows upwards, and extends out of the surface to form stems and leaves.

14, many animals are divided into male and female. Eggs produced by female animals must be fertilized by sperm produced by male animals in order to develop into a new generation of life.

15. Eggs are composed of eggshell, eggshell membrane, egg white, yolk and embryo. Eggshell and egg white have the function of protecting egg cells, and egg white can also supply nutrients and water needed for embryo development.

Egg yolk stores nutrients for embryo development, and the air chamber stores air for embryo development. Iii. Food 16. According to people's living habits, food can be divided into grains, vegetables, fruits and condiments. According to the source of food, it can be divided into food from animals (meat food) and food from plants (vegetarian food).

17. The nutrition of food mainly includes protein, sugar, fat, vitamins and minerals. 18, protein is the main component of human muscle, skin, viscera, hair, nails and blood.

Protein-rich foods include chicken, duck, fish and broad beans. Protein smells burnt after burning.

19, starch is a food rich in sugar. Foods such as fat and sesame are rich in fat.

Sugar and fat can be converted into heat and strength. Provide energy for our activities.

Food smeared or pressed on white paper leaves oil stains, indicating that this food contains fat. Food changes after iodine injection.

9. For the survival of natural resources, it is absolutely necessary to develop and utilize resources and energy resources, but all development and utilization should be comprehensively and scientifically considered from the balance of the whole nature, especially the ecosystem of the earth's environment, that is, the so-called biosphere, in order to achieve harmony between man and nature on the basis of protecting the natural environment and maintaining ecological diversity.

At present, we should not only strengthen and expand those ecosystems with primitive characteristics, that is, those ecosystems that are less affected by human beings, but also maintain their original natural characteristics and balance various elements in the ecosystem through artificial protection and reconstruction, and attach importance to the valuable experience gained by human beings in understanding the toxicity of chemical substances. For various comparative substances, from production to waste, we should consider a safety measure to prevent environmental pollution, and also seek pollution-free production methods to produce non-toxic chemical products. Obviously, this is a higher and more arduous task for chemists.

Article 26 of the Constitution of China clearly states: "The state protects and improves the living environment, prevents pollution and other public hazards, and organizes and encourages afforestation to protect trees." In this way, under the attention and leadership of the Party and the state, we should vigorously publicize and popularize the knowledge of "environmental protection", and Qi Xin should work together to create a balanced, beautiful, pollution-free and pollution-free environment.

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How to protect the earth environment

Hello, Grandpa Earth, we are compassionate and caring pupils. I am sad to see what human beings have done on TV. You have always cared for us so much that the outside world can't use it, but people still overdo it and use it to hurt you. Although I can't make a great contribution to you, we can start from ourselves and call on our classmates to protect you together. Please rest assured. Here are some suggestions to protect you. I wonder if it is possible to:

1, no spitting.

2. Protect life on earth

3. Turn off the faucet in time after using water.

4. All kinds of flowers and trees make you more beautiful.

5. Protecting the ozone layer

6. Don't throw rubbish casually

7. Garbage classification

8. Recycle waste batteries

9. Try not to smoke black smoke.

10, don't waste paper.

Speech on "Protecting the Earth"

Friends:

When humans left the earth for the first time and looked at their hometown in space, people were surprised to find that among the known cosmic stars, only our hometown, the earth, was a blue planet.

Life means blue, and blue means life; The atmosphere and water that enable all life on the earth to survive also make our earth a blue star, a star full of life. However, in front of human beings, nature sometimes becomes bizarre and more and more difficult to control.

From the snowstorm in California to the flood in Bengal Plain, from the high-temperature heat flow sweeping the Mediterranean coast to the large-scale drought that has not been alleviated for many years in the African Plateau, the earth seems to be shaking like malaria, and human helplessness seems to have returned to 10,000 years ago.

If human beings are threatened by nature, it is somewhat a sigh of "helpless flowers falling"; Isn't it a great sin for human beings to "threaten"? Lop Nur, once one of the largest waters in Central Asia, was still a big lake in the * 0s of this century, but by the * 0s, a lake full of water has been replaced by terrible bird carcasses everywhere. No wonder Peng can't find water! For another example, Baiyangdian Lake, known as the "Pearl of North China", dried up again in the spring and summer of * * *, and the sparkling water surface disappeared, and the bottom of Baiyangdian Lake was covered with yellow sand. How can this man-made consequence not be deplorable? In the pursuit and exploration of nature, human beings, as "conquerors", have taken ruthless revenge before celebrating victory.

"There is only one earth", which was a resounding slogan put forward at the human environment conference held in Stockholm in. At last year's World Conference on Environment and Development, heads of state once again called on people to pay attention to "there is only one earth". Friends, when you hear this, you should suddenly realize that "it is everyone's responsibility to protect the environment"! Don't let a lot of forests be cut down, vegetation be destroyed and soil erosion. The earth, a beautiful home, who doesn't want the blue sea breeze to turn into rain, re-moisten the dry lakes and cracked land, and who doesn't want the fresh air blowing head-on, with green mountains and green waters, blue sea and blue sky, to show vitality to mankind forever.

Since ancient times, from the flood control in Yu Xia to the preparation of the Three Gorges Project today, from the goddess mending the sky to building a green city, all these have reflected the ambition of the people of China to protect and transform nature. Friends, we should also actively join the ranks of "environmental protection" and take active actions to make the blue sky always blue, the natural forests always lush, and the rippling rivers always clear ... Work hard!

Friends, let us always remember that there is only one earth for human beings!