100,000 Reasons Why Questions 1. 100,000 Reasons Why Test Questions for Lower Elementary School
100,000 Reasons Why Test Questions
A. Fill in the Blanks
1. China's scientists known as the "Father of Hybrid Rice" is (Yuan Longping).
2, open the soda bottle, the inside will bubble, this is because the inside dissolved (carbon dioxide).
3, the marathon is a long-distance race, the whole (42.195) kilometers.
4, 1 nanometer is equal to (one billionth) of a meter.
5, China's self-developed space shuttle, named (Shenzhou), the first manned (Shenzhou 5). The astronaut named (Yang Liwei).
6. The largest desert in the world is the (Sahara) Desert in (Africa).
7. In daily life, the voltage of the lighting circuit is (220) volts.
8. The largest marine creature is the (blue) whale.
9, the most abundant metal element in the earth's crust is ( aluminum ).
10, light rain is defined as the amount of rainfall less than (10) millimeters in 24 hours.
11, the hardest substance in nature is (diamond).
12, World Environment Day is (6) month (5).
13, the inventor of the electric light is ( Edison ).
14, tides are seawater by the (sun) and (moon) the gravitational effect of the rising and falling movement, the daytime called (tide), the night called (tide).
15, the sound in the steel propagation speed up to (5000) meters per second.
16, a person's life about to drink (80) tons of water.
17, (Watt) invented the steam engine.
18、It is cooler to wear (white) clothes in summer.
19 The three primary colors in art are (red, yellow and blue).
20, penguins mainly live in the seven continents (Antarctica).
21, the gas in the air to support combustion is called (oxygen).
22, the longest organ in the human digestive tract is (small intestine).
23, the earliest crop is (wheat).
24, China's first Olympic champion is (Xu Haifeng).
25, the smallest and coldest star is (Pluto).
26, the outstanding astronomer in Chinese history is (Zhang Heng).
27, the inventor of the battery is (Volt).
28, the ancestor of the fish is called (Wenchang fish).
29, the world's most poisonous spider is (wolf spider).
2. Third Grade "100,000 Reasons" Science Knowledge Contest Questions and Answers
Third Grade "100,000 Reasons" Science Knowledge Contest
Class __________ Name __________ Score __________ (Total 100 points, time is 20 minutes, the maker: Zhang can talent)
I. Judgment questions, the right hit "√", the wrong hit "*". (3 points each, ***45 points)
( )1. Some trees don't lose their leaves in the fall, so they never age or die.
( )2. The body of a snail is similar to that of an ant in that it is divided into three parts: head, thorax, and abdomen. ( )3. I have only heard of worms eating grass, and absolutely nothing about grass catching worms. ( ) 4. Air has no weight, so it floats in the air. ( ) 5. The smallest bird in the world is called a hummingbird. ( ) 6. Paper, plastic, rubber, and moldy food can be recycled. ( ) 7. A measuring cylinder is a glass cylinder with a scale, specially designed to measure how much liquid is in it. ( ) 8, Cai Lun in the year 105 made the world's first plant fiber paper. ( ) 9, the head has a pair of antennae, the chest has three pairs of feet of animals are insects. ( ) 10, the larvae of silkworms (small silkworms) is born in the pupa. ( )11. When a seed sprouts, the root grows downward and then the stem grows upward. ( ) 12. Ants and spiders are insects. ( )13. Animals and plants are living objects and are both organisms. ( )14. The end of the magnet guide is called the North Pole, and the end that points north is called the South Pole. ( ) 15, metamorphosis is a very important feature of insect development.
Second, single-choice questions. (4 points per question, ***48 points)
1, in the case of not opening the black bag, we can find the bag containing ( ).
①, water ②, stone ③, milk ④, drink
2, a small group of paper towels fixed in the bottom of the cup, the cup vertical inverted buckle into the water, the paper towel ( ①, it will be wet ②, will not be wet ③, not necessarily
3, the iron block is heavier than the wood, put into the water, the iron ball will be ( ).
①, sink ②, may float or sink ③, float
4, the following properties, ( ) is not a property of water.
①, odorless ②, tasteless ③, white
)
5. The stem of a laurel tree belongs to ( ).
①, woody stems ②, herbaceous stems ③, herbaceous stems
6. Plants need ( ) to grow properly.
①, sunlight and air ②, air and water ③, sunlight, air and water
7, the ants will guide their companions to take the same route when they move forward, relying on ( )
①, antennae contact ②, foot contact
③, greetings in a special language ④, pheromones
8, earthworms like ( ) living environment.
①, dry and warm ②, wet and cold ③, dry and cold ④, wet and warm
9. Goldfish breathe with ( ).
①, stomata ②, nose ③, gills ④, lungs
10, the following materials, which are natural materials ( ).
①, wood ②, plastic ③, rubber ④, metal ==
11, the roots of plants have three major functions, the following is not the function of the roots ( ①, absorb water ②, absorb minerals ③, fixed plants ④, transportation of water
12, there are two periods in a person's life grows the fastest, which are ( ①, before and after birth and childhood ②, before and after birth and puberty ③, before and after birth and puberty ③, before and after birth and puberty ③, before and after birth and puberty. Before and after birth and pubertal development ③, childhood and pubertal development
Third, brief questions. (***7 marks)
Which four forms does the silkworm go through in its life? Describe them briefly.
Answers:
I. *√**√ *√√√* √*√*√
II.
Why the stomach does not digest itselfThe stomach secretes gastric acid and pepsin, which digests the proteins in meat and turns them into nutrients for the body. The stomach itself is made up of proteins, so why doesn't it digest itself? Scientists have discovered that the stomach secretes a thick, jelly-like mucus substance that covers the inner surface of the stomach and prevents erosion by stomach acid and pepsin. In addition, the epithelial cells of the mucous membrane on the inner surface of the stomach are a special layer of tightly packed structures that form a physiological barrier. This barrier prevents the invasion of gastric acid. As long as the mucus membrane and the physiological barrier of the gastric mucosa are sound, the two "lines of defense" can resist the decomposition of the stomach itself. Why are young people prone to acne? Some people to the age of 17 or 18 years old, often on the face will grow a grain of small bumps to the medical called "acne", generally also known as "pimples". This small bumps in 30 years of age after the gradual cessation of occurrence, so also called "acne". There are many sebaceous glands on the human face. During puberty, sebum production increases dramatically. The sebaceous glands open into the hair follicles, and sebum is discharged from the pores above the follicles. In some cases, the excess sebum secretion, combined with keratinization of the pores under the influence of various external *** and endocrine agents, leads to the accumulation of sebum in the follicles and the formation of small bumps on the face. The mouth of the follicle due to oxidization and the formation of small black spots, but also because the sebum can not be discharged freely, the invasion of bacteria in the pores to reproduce, causing inflammation and pus, so that the small pimples have become big pimples.
4. Primary school lower grades 100,000 Why test questions
"100,000 Why" science knowledge test question bank a. Fill in the blanks 1, known as "the father of hybrid rice" of China's scientists is (Yuan Longping). 2, open the soda bottle, inside will bubble, this is because the inside of the dissolution of the (carbon dioxide). 3, the marathon is a kind of long-distance running, the whole process of the (42.195) kilometers. (42.195) kilometers. 4, 1 nanometer is equal to (one billionth) meter. 5, China's self-developed space shuttle, named (Shenzhou), the first manned (Shenzhou 5). Astronaut named (Yang Liwei). 6, the world's largest desert is the (African) continent of the (Sahara) Desert. 7, in daily life, the voltage of the lighting circuit is (220) volts. 8, the largest marine life is (blue whale). 9, the Earth's crust is the most abundant metal element (aluminum).10, drizzle is defined as within 24 hours, the amount of rainfall is less than (10) millimeters. 11, nature's hardest substance is (diamond).12, the World Environment Day is (6) months (5). 13, the inventor of the electric light is (Edison).14, tides are seawater by the (sun) and (moon) the gravitational effect of the upward and downward movement, the daytime is called (tide), the night is called (tide).15, the sound propagation speed in steel up to (5000) meters per second. 16, a person's life to drink about (80) tons of water.17, (Watt) invented the steam engine. 18、It is cooler to wear (white) clothes in summer. 19、The "three primary colors" in art refers to (red, yellow, blue) colors. 20、Penguins are mainly found in the seven major cities in the world. 20, penguins live mainly in the seven continents (Antarctica). 21, the air to support the combustion of the gas called (oxygen). 22, the longest organ in the human digestive tract is (small intestine).23, the earliest crop is (wheat). 24、China's first Olympic champion is (Xu Haifeng).25、The smallest and coldest star is (Pluto). 26、The outstanding astronomer in Chinese history is (Zhang Heng).27、The inventor of the battery is (Volt). 28, the ancestor of fish called (amphioxus) .29, the world's most poisonous spider is (wolf spider) .
5. 100,000 Why Science Knowledge
Science Knowledge
1, during the day, the birds in the branches shuttle whimpering, flying freely in the blue sky, at night, they and we like people also want to rest, sleep, and regain strength, but they are sleeping in different positions.
2, ice-cream bubble because the outside air there are a lot of eyes can not see the water vapor, encountered a very cold ice-cream, a cold liquefied into a droplet surrounded by ice-cream, it looks as if the ice-cream in the "bubble" as.
3, sunflower stems contain a wonderful plant growth factor. This growth factor is very afraid of light. Once the light irradiation, it will go to the backlight side, at the same time it also *** back broad side of the cell rapid reproduction, so the backlight side than the light side of the growth of the fast, so that the sunflower produced to the spinning light bending.
4, the cicada's shell (exoskeleton) is hard, can not be expanded with the cicada's growth, when the cicada grows to a certain stage, the cicada's exoskeleton restricts the cicada's growth, the cicada will be the original exoskeleton off, is the cicada molt.
5, the bee first picked flowers sweet juice spit into an empty hive, at night, and then the sweet juice sucked into their own honey stomach for modulation, and then spit it out, and then swallowed, so that by turns swallowed, to be carried out 100 to 240 times, and finally brewed into sweet honey
6, we see the star shining, it is not because of the luminosity of the stars themselves appeared to change, but has to do with the obscuration of the atmosphere. The atmosphere separates us from the stars, and when the starlight passes through it, it is affected by the density and thickness of the atmosphere. The atmosphere is not absolutely transparent; its transparency varies according to its density. So when we look at the stars through it at ground level, we will see the stars as if they are twinkling.
7, when we feel tired, the body has produced a lot of carbon dioxide. When there is too much carbon dioxide, it is necessary to then increase the oxygen to balance the body needs. Because of these residual carbon dioxide, will affect our body's functional activities, then the body will send out a protective response, so the yawn. Yawning is a deep breathing action, it will allow us to inhale more than usual oxygen and discharge carbon dioxide, but also to eliminate the role of fatigue it.
8, the snake's body has a lot of scales, which is the most outside layer of armor on their bodies. Scales are not only used to protect the body, but also can be their "feet". When a snake crawls forward, its body will be in an S shape. Each of the scales on the outside of the S-shape will buckle up to help the snake grip uneven surfaces as it moves forward. These scales work with the snake's muscles and propel the body forward, so the snake can walk without feet!
9, our hair has a substance called "melanin", the more melanin hair color will be darker. The more melanin we have, the darker our hair will be. If we have less melanin, our hair will turn yellow or white. When human beings reach old age, their body functions will gradually decline, and the formation of pigment will become less and less, so their hair will gradually become white ah
10, when others tickle themselves, we will feel itchy, and constantly laugh; but when they tickle themselves, we will not only not laugh, and even less feel itchy. Because our mind is prepared, our brain sends out a message that there is no danger, and our nerves relax, so we don't laugh and we don't feel tickled!
11. When you look at the ocean, you often see that the water is blue or green. However, when you pick up the sea water, you can only see it like the water in the past, transparent and colorless. It turns out that seawater itself is not very different from the water we come into contact with every day, and it is also transparent. The green color we see is actually the seawater's ability to absorb light and produce the phenomenon. Only green light can be absorbed by the sea water, thus reflecting out; when the sea water is deeper, green light is also absorbed, the sea water looks blue.
12, the surface of our skin with sweat hair, and each pore has a vertical hair muscle, when subjected to nerve *** (eg: angry, afraid, cold and other situations), the body temperature will fall, and the vertical hair muscle will contract and make the hair stand up, the formation of goose bumps. In addition to the role of insulation, this physiological system can also make the animal's body size looks bigger than it actually is, so as to scare off the enemy
6.beg 100,000 reasons for the knowledge of the summary (a not more than 20 words, 10)
This book this book were introduced to the "mysterious universe", "the beautiful nature", "the", "the", "the", "the", "the", "the", "the", "the", "the", "the", "the" and "the". "Beautiful Nature", "Interesting Plants", "Lovely Animals", "Wonderful Human Body", "Secrets of Health". "The Secret of Health", "Science Around Us", "Amazing Science and Technology" and "Colorful Culture". Help me to understand the world, so that I have developed a love of brains, love to explore the good habits.
This book introduces the "mysterious universe", "beautiful nature", "interesting plants", "cute animals", "strange animals" and "mysterious world". ", "the marvelous human body", "the secret of health", "the science around", and "the amazing technology "and" colorful culture "to help me understand the world, so that I have developed a love of brains, love to explore the good habits. Don't introduce the "mysterious universe", "beautiful nature", "interesting plants", "cute animals ", "the wonderful human body", "the secret of health", "the science around", and "amazing science and technology "and" colorful culture "to help me understand the world, so that I have developed a love of brains, love to explore the good habits.
7. 20 multiple choice questions and 20 judgment questions about "100,000 Reasons"
2. Which fruit is known as the "king of fruits"?
(1) Apple (2) Kiwi (3) Cantaloupe
3. What color is the flower of Hibiscus sabdariffa? (1) Milky white (2) Pink (3) Milky white in the morning, pink at noon, and turning to crimson later in the afternoon
4. Why do people often involuntarily blink their eyes? (1) afraid of things flying into the eyes; (2) cornea and conjunctiva wet, blinking action can also make the retina and eye muscles to get temporary rest; (3) afraid of light.
5, people sweat in order to what: (1) too much water in the body (2) has the role of regulating body temperature, moisturizing the skin. (3) sweating in order to drink water.
6, why the bridge is always designed to arch up: (1) so beautiful and beautiful (2) easy to drive (3) so more solid 7, why the sink downpipe is often made into a curved? (1) can make the sewage flow faster; (2) so that you can stop the sewage in the sewer odor rise; (3) not easy to break.
8, 1 atmospheric pressure boiling water is how many degrees Celsius: (1) 60 degrees Celsius (2) 90 degrees Celsius (3) 100 degrees Celsius
9, the aircraft was shot down by a bird: (1) This is impossible (2) there is such a danger
10, many of the sewer cover why made into a round? (1) in order to beautiful (2) firm (3) not easy to fall into the sewer. 11, how can bats see mosquitoes? (1) bats have good eyesight; (2) bats are relying on ultrasound to see mosquitoes; (3) bats are relying on sensitive nose to determine the mosquito.
12, why stop signals with red: (1) because most people like red; (2) because the red color is conspicuous, in the fog can also be seen; (3) because the red color makes people afraid.
13, why are clouds white and black? (1) Because black clouds are dirty, white clouds are cleaner; (2) black clouds are closer to us, white clouds are farther away; (3) black clouds are thicker, white clouds are thinner.
14. Do plants need air to breathe? (1) need (2) do not need (3) sometimes need, sometimes do not need
15, why are there a lot of particularly beautiful flowers? (1) to show that they look good (2) beautiful flowers to bear delicious fruit (3) to attract insects to help them spread pollen, in order to better reproduce offspring.
16. Why can't you cook rice in an ordinary pot in the mountains? (1) low air pressure on the mountain; (2) low temperature on the mountain; (2) less oxygen on the mountain 1
7, why is the snake's body cold: (1) often live in wet places; (2) do not like to move; (3) snakes are not thermostatic
18, what is the human body's normal body temperature is how many degrees Celsius: (1) 45 degrees Celsius (2) 37 degrees Celsius (2) hot weather (2) When it's hot, it's high, when it's cold, it's low.
19. Why do swallows fly low before it rains? (1) When it is going to rain, it is afraid to fly high. (2) At this time, the small flying insects are flying low, and the swallows have to fly low in order to feed on these flying insects. (3) Because the swallows are covered with moisture and become heavy, they fly low.
20. Why do chickens always like to roll in the sand: (1) There are things to eat in the sand (2) Chickens are not afraid of dirt (3) In order to disinfect.
21, why the little kangaroo must live in the bag? (1) because the baby kangaroo just born has not developed, if not in the mother's bag in the life, it will die; (2) because the newborn baby kangaroo is very timid, so the body in the bag does not come out. (3) Because the kangaroo mom runs fast, afraid of the little kangaroo can not keep up, so to be put in the pouch.
22, which kind of cattle live in the western alpine grasslands? (1) buffalo (2) yak (3) yellow cattle
23, what is a coral polyp? (1) animals at the bottom of the sea (2) plants at the bottom of the sea (3) rocks at the bottom of the sea
24, why do rats like to bite things? (1) bite hard objects to grind the incisors, so that it does not grow too long, affecting the eating. (2) hungry, want to eat
25, the dog wagging his tail is expressed: (1) happy (2) hungry (2) angry
26, why do animals hibernate? Because: (1) lack of food, lower body temperature; (2) need to sleep; (3) afraid of being hurt by other animals.
27, the fastest animal: (1) cheetah (2) tiger (3) humpback
28, what is the heaviest animal? (1) whale (2) hippopotamus (3) elephant
29, when is the wire on the pole longer? (1) summer (2) winter (3) fall
30, sugar dissolves faster in boiling water or in cold water? (1) boiling water (2) cold water (3) as fast as
8. read the knowledge gained by 100,000 reasons.300 words
We will have some strange questions in life, ask mom and dad they can not tell a so and so, and the "100,000 Reasons Why" can help me to solve the problems of life. This book introduces lovely animals, interesting insects, the wonders of space. The blue ocean, and the little knowledge of life and the mysterious earth. It tells me the deep scientific principles, helps me to know the world, and lets me develop the good habit of using my brain, asking questions and exploring. The book "100,000 Reasons" introduces us to the process of the formation of celestial bodies. I know that Venus, Mercury, Saturn, Jupiter, Mars, Earth, Uranus, Neptune, Pluto are the nine planets in the solar system. The Milky Way is made up of many nebulae like our solar system. The Earth where we live is only a "small star" in the universe. Why is sea water bitter and salty? I didn't know why seawater is bitter and salty, but after reading "100,000 Reasons Why", I realized that it is because seawater contains a lot of salts. Chlorination is people usually eat salt, taste is salty; magnesium chloride and magnesium sulfate taste bitter, so the sea water is bitter and salty. In the "100,000 Reasons", it is also answered that shrimp and crab are green when they are alive, but become red when they are cooked? That's because uncooked shrimp and crabs have a lot of melanin, cooked shrimp and crabs have no melanin, only red pigment, so it becomes red. There is also a lot of scientific knowledge can be found in this book. Read "100,000 Reasons" I understand: there are many mysterious and unknown things around us waiting for us to observe, think, explore, it makes me realize that the world is so colorful, knowledge is so puzzle interesting; it lets me know that science is power, knowledge is wealth. I like the "100,000 reasons", when you open the volume, the interesting knowledge of the story allows you to confuse, "100,000 reasons" to enrich my knowledge, broaden my horizons, it is really my mentor and friend.