Contents of popular science knowledge handwritten newspaper:
1. How many tons of water does a person drink in his life? (80 tons).
2. A faucet drips water, 15 minutes drips 200 ml, and nearly 20 liters of water every day. How many tons of water are wasted a year? (7 tons)
3. Give examples to illustrate several methods of power generation. (Thermal power generation, hydroelectric power generation, wind power generation)
4. What are the principles of environmental protection law? (prevention first, the principle of combining prevention with control; Polluter burden principle; Principle of environmental rights; Principle of coordinated development; Principle of public participation; The principle of sustainable development)
5. Which level of protected animals does the white-headed langur belong to in China? (level 1)
6. Please tell us 1998 the cause of the flood in the Yangtze River basin. It is the result of the interaction between "natural disasters" and "man-made disasters". The direct causes of natural disasters are abnormal climate and excessive rainfall; There are three main reasons for man-made disasters: first, the destruction of surface vegetation and serious soil erosion. Second, the number of rivers and lakes is decreasing, which further reduces the flood storage and discharge capacity. Third, the necessary flood control measures can't keep up, and the urban flood control standard is low)
7. From 1980 to 1995, how much has the world forest area decreased? (65438+800 million hectares)
8. The shortage of water resources has become a major problem in the urban development of China. According to statistics, more than 300 cities in China are short of water. What is the annual economic loss caused by water shortage in China? How big is the economic loss caused by water pollution? (654.38+more than 0 billion yuan, more than 40 billion yuan)
9. What is the percentage of freshwater resources in global water resources? (3%)
10. What is the proportion of polluted rivers in China at present? (90%)
Life common sense
0 1
Is it easy to get gallstones without breakfast? It's true!
Even if you don't eat breakfast, you will secrete bile, which will cause bile accumulation and easily form gallstones.
In addition, it is easy to get stones if you don't eat lunch and dinner.
Therefore, in order to lose weight and not eat, it is best to change the method!
02
Can eating big bone soup supplement calcium? It's fake!
Calcium in bones is difficult to dissolve, and as a result, there is still little calcium in soup.
Even less than one tenth of calcium in milk, it is impossible to really supplement calcium.
03
Can cactus be put in front of the computer to prevent radiation? It's fake!
Cactus has no radiation protection function.
In fact, no plants have been found to have radiation protection ability.
04
Wear contact lenses during barbecue, will it melt and lead to blindness? It's fake!
Qualified contact lenses are still very stable at high temperatures.
Don't worry about melting at high temperature. You can abandon the frame glasses and barbecue generously!
If you feel uncomfortable, blink more and squeeze some tears. Contact lenses are more resistant to high temperatures in the presence of water.
05
Can a snakehead bite after being cut off? It's true!
Because snakes are warm-blooded animals, their heads need little oxygen after being beheaded, and they can survive for a while!
So everyone must pay attention to safety. If you encounter a similar situation, don't be careless
After the snakehead is cut off, chop it up, burn it or bury it. Don't go near it easily!
06
There is bisphenol A in the supermarket receipt. Can touching too much cause cancer? It's fake.
Although the supermarket receipt contains bisphenol A, every 1g receipt contains 0.0 139g bisphenol A, and its migration to human body is very small. Take the cashier as an example. The cashier's daily contact time with the receipt is 10 hour, and the intake of bisphenol A is 42 times lower than the allowable intake.
Therefore, consumers who touch several shopping receipts a day will not affect their health and will not cause cancer.
07
Is "Drip Guanyin" poisonous? It's true!
The dripping Guanyin itself will not release toxic gas, but the dew oozing from leaves or the endocrine juice from stems are toxic.
Different degrees of poisoning symptoms will appear after accidental contact or eating.
It is best not to plant it indoors. If you plant it, you should be careful not to break it and get its juice out. Friends with children or pets should be careful!
08
Does the scented eraser contain poison? It's true!
Fragrant erasers may contain more toxic and harmful chemicals than ordinary erasers!
This substance is not formaldehyde, but benzene chemical reagent, which can bring fragrance.
At present, the scented erasers used by students belong to new stationery, and the state has no corresponding testing standards for these stationery.
Don't buy it until you see the formal packaging on the rubber!
09
Sweet Q-bomb taro balls may contain paint ingredients? It's true!
In order to make taro taste q-elastic, there are indeed merchants in the market who add "maleic acid" to taro, which is an industrial raw material for paint.
So when choosing, we should pay attention to the price and quality of taro.
Experts suggest that we'd better choose something original instead of pursuing the texture, color and taste of food excessively.
10
Snoring is actually a disease? It's true!
Snoring is very common, but it should not be underestimated!
Especially intermittent snoring is caused by airway obstruction and then hypoxia, which is long-term and chronic.
Can lead to brain, heart, lungs, liver, kidney hypoxia, and can cause obesity, and then aggravate snoring.
After the vicious circle, the condition becomes more and more serious, which can lead to sudden death. When snoring is serious, you should go to the hospital for professional examination and treatment.
1 1
Plastic wrap can't be reused and heated? It's true!
Repeated use of plastic wrap will cause cross-infection of food and breed bacteria.
So don't use it repeatedly, it will accelerate the spoilage of food!
In addition, only the plastic wrap marked "Microwave available" can be heated or disinfected, but the time cannot be too long.
12
Eating pig blood can remove dust from the lungs? It's fake!
Although some protein can indeed combine some pollutants, it is done in the digestive tract after all.
Inhalable dust is inhaled into the lungs, so it is impossible for us to eat the lungs and trachea.
So the role of pig blood is still very limited. But the iron supplement effect of pig blood is still good.
13
Can smoked moxa sticks and onions remove formaldehyde? It's fake!
None of these methods can remove formaldehyde. As for charcoal and bamboo charcoal, although the adsorption capacity is good, it is easy to reach saturation, and it must be dried at intervals to restore the adsorption capacity.
In in addition to formaldehyde's method, the most reliable method is ventilation. It is best to ventilate the house for more than three months after renovation.
14
Some cell phone covers can cause cancer? It's true!
Cheap and inferior mobile phone cases are made of some waste plastics and contain harmful substances such as formaldehyde and benzene.
It will also volatilize and release toxic substances such as benzene series.
So friends try to choose those mobile phone cases with clean and transparent colors and single material, and don't buy those with pungent smell, choking eyes and fading when touched!
15
It's true that cutting peppers can be alleviated by oil or alcohol!
The main component of pepper is capsaicin, which is oil-soluble and insoluble in water.
It is a better method to pour oil or alcohol on your hands and wipe them off with paper when you feel the pepper is spicy.
If you need to touch a lot of peppers, it is more reliable to wear thick gloves.
16
Radiation suit can shield pregnant women from radiation? It's fake!
In normal living and working environment, electromagnetic radiation does not need to be protected by radiation protection clothing. The radiation value of household appliances is low,
Moreover, it will be greatly attenuated one meter away, and it is difficult to exceed the national safety standards.
Although the radiation protection suit can shield the cell phone signal, the measured radiation value has not changed, not to mention it can prevent radiation.
17
Hand sanitizer is cleaner than soap? It's fake!
Soap has stronger sterilization ability!
Because the content of surfactant in soap is much higher than that in hand sanitizer, in the process of washing hands, surfactant removes oil stains and stains on the skin surface as well as bacteria, which makes soap have strong decontamination ability.
So you'd better wash your hands with soap!
18
Can eating too much chicken essence or monosodium glutamate cause cancer? It's fake!
This statement has no scientific basis. Both do increase the sodium content in the diet. Monosodium glutamate is a kind of high sodium food, because it contains sodium glutamate, and chicken essence contains salt, monosodium glutamate, spices and additives.
The main danger is actually that it is not good for hypertensive patients, and it may also interfere with the amino acid balance of young children.
Therefore, patients with hypertension and children should try not to eat these two kinds of high sodium seasonings.
Don't say I don't know, I was shocked when I said it.
Emma, when I was young, I had many scented erasers.
It's all poisonous!