I. Foundation and ability (2 points for each question, *** 100)
1. The following statement about scientific research is incorrect ()
A. Be careful in scientific research and be good at asking questions.
B. To carry out scientific research, we should do experiments seriously and collect relevant information.
C. To conduct scientific research, we should be good at analysis and induction, and find out the answers to questions.
D. scientific research is a scientist's business, and we can't study it.
2. The following research belongs to direct observation ()
A. Observe the virus with an electron microscope B. Smell the gas with your nose.
C. Diagnose the patient's condition with B-ultrasound D. Observe the space with Hubble telescope.
3. The following units are arranged correctly from big to small ()
A. meter, centimeter, decimeter, nanometer. Decimeter 3, millimeter 3, centimeter 3, meter 3.
C. tons, kilograms, grams, milligrams, minutes, hours, seconds, days.
4. A student forgot to write the unit in the measurement record. Which of the following data is in centimeters ()?
A. The diameter of a pencil is 7 b. The height of the teacup is 10.
C The length of the physics book is 2.52d, and his own height is 16.7.
5. What are the units of nanometers and light years? ( )
A. length and temperature; B. length and time; C. they are all units of length; D. it's all time units.
6. A classmate uses the adjusted tray balance to weigh the mass of an object. After adding several weights to the right plate of the balance, when the weight with the smallest mass is put in, the pointer tilts to the right; If the smallest weight is removed, the pointer goes to the left. The correct way to measure the mass of an object is ().
A take out the minimum weight and adjust the beam nut to the right.
B. Adjust the beam nut to the right without taking out the minimum weight.
C. Adjust the roaming code at the zero scale position to the right without taking out the minimum weight.
D, take out the minimum weight, and adjust the travel code of zero scale position to the right.
7. Before weighing the mass of the object with the balance, it is found that the beam pointer of the pallet balance is as shown on the right, so it should be ().
A. Adjust the roaming code to the left B. Adjust the roaming code to the right.
C. adjust the balance nut to the right. Adjust the balance nut to the left.
8. The mass of an egg and the thickness of a test paper are about () respectively.
A.60，0.8mm B.60，80μ m C.6g，0.8μ m D.6g，80μ m
9./kloc-The world record for the 0/00 meter dash is about ().
A.20 seconds B.5 seconds C. 10 seconds D. 15 seconds
10.6 students measured the length of the same natural science textbook with a scale, and the measured data were 26.02 cm, 26.09 cm, 26. 10 cm, 26.00 cm, 26.08 cm and 3 1.38 cm respectively. One of the closest to the true value is ()
A.26.02 cm b.26.09 cm c.26.08 cm d.cannot be determined because the true value is unknown.
1 1. Accurately measure 45 ml of tap water, and the measuring range of the selected measuring cylinder is ().
50 ml b. 10 ml c. 100 ml D.200
12. The mercury level of the thermometer means that at 37.5℃, a classmate measures the temperature of a sick classmate without shaking, and the measured results are 37.5℃ for the first time, 38.5℃ for the second time and 38.5℃ for the third time. Then ()
A.only the first time is right. Only the second time is right.
C. Only the third time is correct. D. the second time must be right, and the first time and the third time may be right.
13. Intermittent exercise starts at 9: 00 every day, ends at 9: 30, and lasts for ***20 minutes. The correct statement in the following statement is ().
A 9: 00, 10, 9: 30 refers to the time, and 20 minutes is the time interval.
B 10 at 9: 00 and 9: 30 refers to the time interval, and 20 minutes is the time.
C 9: 00, 10, 9: 30 and 20 minutes all refer to time intervals.
D. 19 o'clock 10, 9: 30 and 20 minutes all refer to time.
14. In the cockpit of a spacecraft running in space, the mass of an object is measured with a balance, and the result is ().
A. the measured quality is the same as that on earth. B.the measured mass is larger than that on the earth.
C. the measured mass is less than that measured on the earth. The mass of an object cannot be measured with a balance.
15. In the four pictures shown below, the method to correctly measure the diameter of the cylinder section is ().
17. Chlorella and willow belong to the plant kingdom, and they are very different and have few similarities. Corn and roses belong to the phylum of seed plants and have many similarities. This fact shows that ()
A. The higher the classification level, the more * * * similarities among the included organisms.
B. The higher the classification level, the smaller the differences among the included organisms.
The lower the classification level, the greater the similarity between the organisms involved.
D. The lower the classification level, the greater the difference between the included organisms.
18. Immature grapes taste sour, and this acidic substance mainly exists in ().
A. In the nucleus B. On the cell membrane C. In the vacuole D. Cell wall
19. In cell division, the most striking thing is ().
A. Cells become smaller B. Chromosomes appear in the nucleus C. Cells become more D. Cell morphological changes
20. Fungi and green plants are very different in structure ().
A. No vacuole B. No cell wall C. No chloroplast D. No nucleus formed.
2 1. The real plant with roots, stems and leaves is ().
A. viviparous golden retriever, centipede, pumpkin and kelp
22. The main organ of plant photosynthesis is ().
A. Chlorophyll leaves of mesophyll cell leaves
23. The following understanding of the meaning of "amphibian" in amphibians is correct ()
A. larvae live in water and adults live on land.
B. Sometimes I live in water, and sometimes I live on land.
C larvae live in water, and adults can live in water or land.
D. mainly lives in water and also lives on land.
24. When observing the slide specimen printed with the word "B" under the microscope, the image seen in the field of vision is ().
A.q.b.d.c.p.d.b
25. The main reason why Pasteur disinfection is "fresh" is ()
A. slow high temperature kills microorganisms in food B. rapid high temperature kills microorganisms in food.
C, rapidly killing microorganisms in food at low temperature D, slowly killing microorganisms in food at low temperature.
26. The structural level of human fertilized eggs developing into fetuses is ().
A. Cell, tissue and organ system, human body
B. Organs, tissues and cells of human system
C. Tissue, cell, organ system, human body
D. Human cells, tissues and organ systems
27. The main reason for classifying mesophyll as vegetative tissue is ()
A. mesophyll cells can perform transpiration. B. mesophyll cells can carry out photosynthesis.
C. mesophyll cells can breathe. Mesophyll cells can be transported.
28. The human skin belongs to ()
A. cell b, tissue c, organ d system
29. The body color of stick insects is consistent with the color of the surrounding environment, which is beneficial to ()
A. avoiding natural enemies is also beneficial to catching food. B. growth and response to environmental stimuli.
C. catching food, but not conducive to avoiding natural enemies D. avoiding natural enemies, but not conducive to catching food
30. In order to study the influence of sunlight on soybean germination, a classmate planted the same soybean seeds in two identical flowerpots and designed the following experiment: The mistake that should be improved in this experimental design is two flowerpots ().
Flower pot lighting conditions temperature water
20℃ is enough for nails facing the sun.
20℃ in the shade is not enough.
A.they should be placed in sunny places. They should be watered enough.
C. The temperature should be 0℃. D. don't water it.
3 1. As shown in the figure, the latitude and longitude coordinates of point P are () 30.
A. latitude 200 south, longitude 300 west, latitude 200 north and longitude 300 west.
C 200 S, 300 D E, 200 N, 300 40 30 20 E10.
32. Xiaoming wants to draw a plan of the school. Before drawing, he must determine the size of the scale. The following four sets of scales are more suitable ()
a . 1:500 b . 1:5000 c . 1:50000d . 1:500000
33. "The water in Qian Jiangchao is a wonder of the world." On August 18th of the lunar calendar, when there is no wind, the Qiantang River will set off waves several meters high. Its formation is related to the moon, and the following statement is true ()
A, related to the shape of the moon B, related to the absence of air on the moon.
C, related to the lack of water on the moon D, related to the attraction of the moon.
The starry sky changes with the four seasons of the earth. There is a star whose position remains unchanged all the year round. This star is ().
A. Sirius arcturus Polaris Antares
35. Eclipses don't happen every month. Once it happens, it can only be in the lunar calendar ().
A. Grade 1 B. Grade 8 C. XV D. XVIII
36. When the total lunar eclipse occurs, when the moon is completely covered, the moon we see is ().
A. red B. bronze C. yellow D. invisible
37. Seen from the satellite, there are many white eddies on the earth's surface. These white material are ().
A. glaciers B. clouds C. land D. waves
38. The longest latitude circle on the earth is ().
A. Equatorial B. North latitude C. Tropic of Capricorn D. Arctic Circle
39. Xiao Zhang and Xiao Wang, who live in Hangzhou, plan to travel around Zhejiang by car. When they leave, they must take away all kinds of daily necessities ().
A. Zhejiang administrative map B. Zhejiang water system map C. Zhejiang traffic and tourism map D. Zhejiang tourism map
40. At eight or nine o'clock in the evening, the season when the Cowherd and the Weaver Girl appear near the zenith is ().
A. spring, summer, autumn and winter
4 1. In the poem "On the willow tip, people meet after dusk", the moon phase is ().
A. First quarter moon B. New convex moon C. Full moon D. Last quarter moon
42. 1999, China successfully launched an unmanned spacecraft, and after many tests, manned space flight was realized in 2003. The name of this series of spacecraft is ().
A. Long March B. Dongfanghong C. Shenzhou D. Excalibur
43. The following are four kinds of moon phases that we often see. The order in which they appear within a month is ().
① ② ③ ④
A.④③②① B.④①②③ C.②③④① D.②①③④
44. The following phenomena can prove that the earth is round ()
A. solar eclipse B. lunar eclipse
C. When the sailboat is far away, the mast disappears in front of the hull. None of the above is true.
45. The hierarchy of celestial bodies system, from small to large, the correct order is ().
A solar system-galaxy-earth-moon system-whole galaxy
B. Milky Way-Extragalactic Galaxy-Solar System-General Galaxy
C. earth-moon system-Galaxy-General Galaxy-Extragalactic Galaxy
D. Earth-Moon System-Solar System-Galaxy-General Galaxy
46. At seven or eight o'clock in winter, you will see that the brightest star in the whole sky is ().
A. Polaris B Sirius C Vega D Altair
47. The following festivals are determined according to the lunar calendar ()
A. National Day, Mid-Autumn Festival B. New Year's Day, Children's Day.
C. Spring Festival, May Day International Labor Day D. Dragon Boat Festival and Double Ninth Festival
Xiao Ming put a piece of ice in an empty cup and put it in a room at 25℃. After a period of time, there is still a small amount of ice in the glass that has not melted. The following statement is correct ().
A. The temperature of ice is 0℃, and the remaining ice continues to melt. B the temperature of the ice is 0℃, and the remaining ice stops melting.
C. When the temperature of ice is higher than 0℃, the remaining ice continues to melt. D the temperature of ice is lower than 0℃, and the remaining ice continues to melt.
49. In summer, people standing in front of running electric fans feel cooler than those who don't use electric fans, because ()
A. the wind blew away the temperature of the air. B.the wind blew away people's temperature.
C. The wind blows away the heat in the air D. The air flow is accelerated, which accelerates the evaporation of sweat and absorbs the heat of the human body.
50. In the cold winter, there are often "ice flowers" on the glass window, so ()
A. "Ice flower" is a solidification phenomenon B. "Ice flower" is usually outside the glass window.
C. "Ice flowers" are usually stuck in glass windows. D. "ice flowers" are found inside and outside the glass window.
Second, the experiment and inquiry (2 points each, ***20 points)
5 1. When making temporary cover glass, first make one side of the cover glass contact with the liquid on the glass slide, and then gently put it down. The purpose of this operation is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
52. In the experiment of "Conditions for Microbial Growth on Food", we should explore the relationship between microbial growth and moisture.
Put dry bread in Petri dish A, bread moistened with water in Petri dish B, and only distilled water in Petri dish C; Excuse me, in these experiments, Petri dish C plays the role of _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
53. The picture above shows the electronic scale for measuring the quality of apples, and its unit is _ _ _ _ _ _ _ _ _. Excuse me: The quality of this apple is _ _ _ _ _ _ _ _ _ _ _
54. The moon keeps going around the earth, but its side (front) always faces the earth. The other side (back) always faces away from the earth. Scientists have found that there are more craters on the back of the moon than on the front. Please analyze the reasons _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
55. In severe winter, yellow wine is often poured into inkstone to grind ink instead of water. Try to analyze the benefits of this _ _ _ _ _ _ _ _.
Read the following.
In Colorado, one day, seven children suddenly fell ill, accompanied by diarrhea, stomach pain, fever, vomiting and other symptoms. A few days later, 43 people had the same symptoms. The test results show that all patients are infected with a bacterium, which can be spread through infected meat or eggs. So how do children get infected with germs? Why are some children infected and others not? Researchers believe that these bacteria come from some contaminated food. They questioned the children. But the children said: they didn't eat together!
So what activities did the children participate in together? The investigation found that they went to the zoo to visit a lizard exhibition. After examination, the researchers found that a lizard was indeed a carrier of pathogens. But the animals on display are not allowed to touch, so how can it be transmitted to children?
So, the researchers carefully asked the children about their activities in the exhibition area and compared the information they provided with those children who were not sick. It turned out that the children who washed their hands were not sick, and the children who didn't wash their hands were sick.
Further screening and analysis of the data showed that all the children who touched the wooden fence and didn't wash their hands were sick. Examination of the wooden fence did find pathogens. It turns out that children get sick like this: they climb the wooden fence around lizards, eat directly without washing their hands, and germs enter the body through their mouths.
In studying the above reasons, the researchers:
(1) The problem is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
② The hypothesis is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
③ The evidence collected is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
The first semester of the 2004 school year, the final answer sheet of the first grade science competition in junior high school.
I. Foundation and ability (2 points for each question, *** 100)
1 2 3 4 5 6 7 8 9 10
1 1 12 13 14 15 16 17 18 19 20
2 1 22 23 24 25 26 27 28 29 30
3 1 32 33 34 35 36 37 38 39 40
4 1 42 43 44 45 46 47 48 49 50
Second, the experiment and inquiry (2 points each, ***20 points)
5 1.______________________________________________.
52.______________________________________________.
53.___________; _______________; ________________.
54.________________________________________________.
55.________________________________________________.
56.①______________________________________________.
②______________________________________________.
③______________________________________________.
Reference answer for the final exam of the first semester of the 2004 school year.
I. Foundation and ability (2 points for each question, *** 100)
1 2 3 4 5 6 7 8 9 10
D B C B C D C B C C
1 1 12 13 14 15 16 17 18 19 20
The 1st century A.D.
2 1 22 23 24 25 26 27 28 29 30
A D C A B A B C A B
3 1 32 33 34 35 36 37 38 39 40
B A D C A B B A C B
4 1 42 43 44 45 46 47 48 49 50
B C C B D B D A D C
Second, the experiment and inquiry (2 points each, ***20 points)
5 1._ _ Prevent bubbles from generating and affect the observation _ _ _ _ _ _ _ _ _.
52._ _ Contrast (or contrast) _ _ _ _ _ _ _ _ _ _ _ _.
53. Kilogram _ _ _ _ _; _ _ 0. 1kg _ _； __ 10___________.
54. The front of the moon always faces the earth, and the earth blocks the meteorites that hit the moon.
55._ Reduce the freezing point of water so that it will not solidify _ _ _ _ _ _ _.
56.( 1) How do germs enter children? _______.
(2) _ _ germs may enter the child's body from the child's mouth _ _ _ _ _ _.
③ _ Lizards are carriers of this pathogen. Children climb the wooden fence around lizards and eat directly without washing their hands. Bacteria enter the body through their mouths.
References:
I hope it helps you.