What is the title of the 29th International Science and Peace Week National Golden Key Competition for Primary and Secondary School Students (Jiangsu)?

First, multiple choice questions (multiple choice questions. Fill in the brackets with the letters of the correct options. 2 points for each question, ***30 points)

( ? ) 20 17 Year of the Rooster, the following description about the chicken is correct:

Chicken's taste is very sensitive, both salty and sweet can be tasted.

B domestic chicken has better eyesight than the original chicken (the ancestor of domestic chicken) because of human domestication.

C chickens, like people, have mental stress. When the pressure is great, chickens lose their hair.

( ? The growth direction of some plants always seems to turn to the light source, and climbing plants always grow up along the scaffolding, which is the phototropic growth of plants. The main reasons for phototropic growth of plants are:

Can a lamp accelerate the synthesis of auxin? B light accelerates photosynthesis in plants? Unilateral illumination affects the distribution of auxin.

( ? "Ultra-high-speed train" is an ultra-high-speed train that scientists are exploring, with a speed of 1200 kilometers per hour. Regarding the "super high-speed rail", the following statement is wrong:

The "super high-speed rail" runs in a completely vacuum pipeline.

B The propulsion and acceleration technology adopted by "Super High Speed Rail" is similar to that adopted by the second generation vacuum tube maglev train in China.

C "super high-speed rail" is cheaper than high-speed rail, unaffected by the weather, and safer than general modes of transportation.

() Which of the following substances will make purple cabbage water turn red? A white vinegar? b？ Edible alkali? suds

() The secretion of a certain hormone is influenced by the circadian rhythm cycle and secreted by the pineal gland in the brain. At present, the long night light in the city inhibits the secretion of this hormone in birds, leading to precocious puberty in birds. This hormone is:

A growth hormone? b？ Melatonin c gonadotropin

( ? Nowadays, 3D printing has been well known by adults, and 4D printing has gradually entered people's sight. The following statements about 3D and 4D printing are false:

Answer? Compared with 3D printing, 4D printing adds a spatial dimension.

b？ 4D printing is essentially 3D printing using composite materials.

c？ 4D printing technology can automatically deform and combine printed objects.

( ? ) 2016 65438+February 1 1, China successfully launched Fengyun-4 satellite in xichang satellite launch center, which means that the weather monitoring and early warning in China will be more accurate in the future. Regarding Fengyun-4 satellite, the following statement is wrong:

Fengyun-4 is a stationary satellite.

B Fengyun-4 satellite belongs to polar orbit satellite.

C Fengyun-4 satellite belongs to meteorological satellite.

( ? Blood is like a rushing river, flowing in all organs and tissues of the human body. About blood, the following statement is wrong:

Answer? Blood cells in human blood are composed of red blood cells, white blood cells and platelets, among which red blood cells have the longest life span.

b？ ABO blood group system matching can be used for blood transfusion without cross matching.

c？ The total blood volume of a healthy person accounts for 7%~8% of body weight.

( ? ) Mercury thermometer can measure body temperature by using the following principles:

A expands with heat and contracts with cold? b？ Law of conservation of energy? c？ law of conservation of mass

( ? In today's high-tech era, we can identify human body information in many ways. Among the following human body information recognition technologies, what is the highest accuracy?

Fingerprint identification B facial recognition? c？ Iris recognition

( ? ) of the eight planets, the closest to the earth is:

Answer? Venus? b？ Jupiter? c？ launch

( ? ) 20 16 On August16, the world's first quantum science experimental satellite developed by China was successfully launched at Jiuquan Satellite Launch Center, which is expected to realize global quantum secure communication. Quantum satellites are named after which of the following people?

Answer? Meng Ziyi? Confucius c? Mozi

( ? ) AG600 is a large-scale amphibious aircraft for fire fighting and water rescue independently developed by China. The following statement about AG600 is wrong:

Answer? AG600 is a large-scale special military aircraft developed to meet the urgent needs of forest fire fighting and water rescue in China.

b？ AG600 is the largest amphibious aircraft being developed in the world today.

c？ At present, turboprop engine, turbojet engine and turbofan engine are mainly used as power devices in the world. The AG600 uses four domestic turboprop engines.

Tianzhou-1 cargo spacecraft was successfully launched in April 20 17, and will carry out three independent rapid transportation and docking, three in-orbit propellant replenishment, and experimental projects in space applications, aerospace technology and other fields. The following description about the rendezvous and docking of Tianzhou-1 cargo spacecraft and Tiangong-2 cargo spacecraft is wrong:

A cargo ship Tianzhou-1 is bigger than Tiangong-2 and Shenzhou, and it is the largest and heaviest ship in China?

B Tianzhou-1 was sent into space orbit by Long March 7, and then began to rendezvous and dock with Tiangong-2?

Floating disconnector of liquid circuit C and space compressor are two main technical problems to be solved when Tianzhou-1 refuels Tiangong-2 in space.

( ? ) In our eyes, there are two kinds of photoreceptor cells: rod cells and cone cells. We can see color mainly because of cones. Among the following animals, the tip of cone cells is the least:

Answer? Mantis shrimp? b？ Butterfly? c？ dog

Judge whether it's true or not (mark "√" for the correct one and "×" for the incorrect one). 2 points for each question, ***30 points)?

( ? In the northern hemisphere, you can tell the direction by the tree rings when you get lost. The broad side of the halo points south and the narrow side points north.

( ? ) The 5G technology being developed around the world refers to the fifth generation of mobile phones.

( ? You can't change your position on the plane at will, because all planes must follow the principle of balance when flying in the sky. According to the requirements of the center of gravity of the aircraft, passengers and luggage are dispersed, so as to calculate the most suitable flight parameters of the aircraft, such as altitude, speed and fuel quantity. Changing seats at will destroy the overall balance of the aircraft and endanger flight safety.

( ? ) 100 yuan The front is blank on the left, and Chairman Mao's head can be seen through the light. This is what we often call watermark, which mainly plays the role of anti-counterfeiting.

( ? ) The secretion of melatonin in the human brain will change with age, and the secretion of melatonin will increase with age.

( ? ) Our most common fire extinguishing method is to put out the fire with water, but not all fires can be put out with water, such as fires caused by high voltage electricity and oil fires.

( ? ) The glow stick will emit light in the bending process, mainly because the oxidant and reductant in the glow stick meet after bending and have a chemical reaction, and the generated new substance will be transmitted to the fluorescent dye to emit light.

( ? As a transgenic crop, the biggest difference between sea rice and ordinary rice is that sea rice can grow in saline-alkali land or be irrigated with seawater.

( ? ) We can't remember the things in infancy, mainly because the memory area in the brain is not yet mature, and language is very important for the formation of memory, so we just can't speak in infancy.

( ? The concept of autophagy was first put forward by yoshinori ohsumi, a Japanese scientist who won the Nobel Prize in Physiology or Medicine in 20 16.

( ? ) 2016165438+10 3, China's "Long March V" carrier rocket successfully made its first flight at Wenchang Space Launch Site in Hainan. The "Long March 5" carrier rocket is a rocket dedicated to launching cargo spacecraft in China.

( ? When he met the smoke from the fire, he quickly left and ran to the top of the building for help.

( ? ) The deer pulling the sleigh for Santa Claus is reindeer, which is the only deer with horns.

( ? ) Not all the plants successfully planted by astronauts in space can be eaten.

( ? Standing in the water, the legs look shorter than those on the shore because of the refraction of light.

Third, comprehensive application questions (***2 questions, each question 10 ***20 points)?

Terrible flu (please fill in the letter of the correct option in brackets, with 5 points for each question, *** 10)?

Spring is the high incidence of influenza, and many friends around me have symptoms of cough, runny nose, headache and fever. Question: (1) What causes the flu? ( )?

Answer? B caused by virus infection caused by catching a cold and infecting C bacteria?

(2) Very bad, the science teacher was also hit by a stray bullet, and his voice became hoarse. If we do a simulation experiment: stretch rubber bands with different thicknesses on the plastic box cover to make a rubber band piano. You can find different tones by plucking the rubber band. In the following phenomena, similar to the teacher's vocal cord lesions, the truth of hoarseness is (? )

Answer? When you pluck a thin rubber string, the tone becomes lower? b？ When you pluck the thick rubber string, the tone becomes lower? Nothing above C.

Jump into the water?

When summer comes, Xiaohua often goes swimming in the swimming pool. He found that he could jump higher than usual by lightly stepping on the bottom of the pool. Question:?

(1) What is the reason why Xiaohua can jump higher than usual in the swimming pool?

Answer? When people enter the water, they lose the gravity of the earth on their bodies, so they can jump higher than usual.

b？ The buoyancy of water helps Xiaohua jump higher.

When person C is in the water, his jumping ability is greater than that on land, so he jumps higher.

(2) The following description about the buoyancy of water is correct ()

Generally speaking, objects put into water will be affected by the buoyancy of water.

b？ Objects that sink to the bottom are not affected by buoyancy.

c？ When a piece of wood is put into water, it will float on the water, and when pressed hard, it will also be immersed in the water. When it floats on the water, it will be as buoyant as when it is immersed in water.

Fourth, divergent thinking questions (20 points in this question) What can balloons do?

What can you do with balloons? ?

Here are 1~2 balloons for you. What scientific experiments or interesting tricks can you do with them? With balloons as the main body, other experimental equipment or articles can be added. Write at least two experimental schemes in the third and fourth grades, and at least four experimental schemes in the fifth and sixth grades, and describe them in simple words.

Fifth, research exercises. ?

Do plants have phototaxis?

At the beginning of the new semester, the teacher brought a pot of money and planted it in several glasses with clear water. Several cups are on the south windowsill, several cups are on the north windowsill, and one cup is on the podium. Two weeks later, careful Xiaoming found that the money grass on the windowsill turned into a "crooked head": the money grass on the south windowsill tilted to the south, the money grass on the north windowsill tilted to the north, and the tree near the podium by the window tilted slightly to the north, which was very interesting!

Experimental equipment:

3 large cartons and 3 cups of locally cultivated mung bean seedlings.

Experimental process:?

On the top of the three large cartons, choose the left, middle and right positions, and cut a round hole with similar size and light transmission.

Put 1 cup of locally cultivated mung bean seedlings in the same position in the middle of three cartons, and then put them in the sunshine in the corridor.

1 week, open the cartons and observe the growth of mung bean seedlings in three cartons. Experimental record:

Experimental conclusion: The slanting growth of mung bean seedlings is affected by light, which shows that all plants have phototaxis. ?

Question:?

Is the conclusion of Xiaoming's experiment reliable? Why? (8 points)

Do you think Xiaoming's experiment needs to be improved? (Write at least 4 improvement methods, each with 3 points, *** 12 points)