The science around you
As long as you pay attention, science is everywhere.
On Saturday, the teacher assigned an assignment to do a scientific experiment. I thought about it and finally came up with an experiment. I want to do a scientific experiment that eggs will float.
Prepare a cup, an egg and some salt. Put water, eggs and salt in the cup first. It's strange that the egg didn't float at this time. As soon as I thought about it, I added salt to the cup in spoonfuls. After adding a few spoonfuls, I found that the eggs began to float slowly. Gradually, the eggs rose to the surface like an elevator.
Why do eggs float from salt water? Because after adding salt to the water, the density of salt water becomes larger, and the buoyancy is greater when the density is larger, and the eggs can be held up when the buoyancy is greater.
This scientific experiment is really interesting. I'll try again.
Chapter 2: Science around us
One night, my mother bought a bag of shrimp. The shrimp is blue, but the cooked shrimp turns red. I asked my mother. My mother didn't tell me the answer directly, but gave me a book, Question and Answer, to find the answer by myself.
I looked for it and finally found it, because there is a pigment called astaxanthin in shrimp. Usually mixed with other pigments, it can't show its bright red color, but after heating, all other pigments are destroyed and decomposed, except astaxanthin, which is not afraid of high temperature, so shrimp turns red after cooking.
It turns out that there is science everywhere in life!
Chapter 3: Science around us
Speaking of science, in fact, many things that happen around us are solved by science. Let me give you a simple example.
I remember once, my mother asked me to open the vinegar bottle when I was cooking, but I just couldn't unscrew it.
Later, my mother told me that it was easy to unscrew the vinegar bottle by soaking it in hot water for five minutes and then washing it with cold water. In this way, I tried to do it in my mother's way. Sure enough, the vinegar bottle was easily unscrewed. My mother told me that this is the effect of heat expansion and cold contraction.
After this incident, I sincerely thank science, which makes me progress and helps me grow.
2. The teaching plan of "I will ask and you will answer" in the second volume of the kindergarten middle class.
Activity name: I ask you to answer.
Activity objectives:
1. By reciting poems, we can get a preliminary understanding of the structural characteristics and language style of the question-and-answer songs.
2. Let the children recite poems rhythmically and read the intonation of questions.
3. Consolidate relevant knowledge.
Activity preparation:
1, rhythm card.
2. Pictures of bees, butterflies, dragonflies and fireflies.
3. Courseware: skills and living habits of bees, butterflies, dragonflies and fireflies.
Activity flow:
1, the game "Little Honeycomb". Q: Who flew away? A: Bees. Look! The bees are flying again.
2. Show the rhythm card and guide the children to clap their hands according to the rhythm. Show pictures of four kinds of flying insects and guide children to say according to the rhythm of language: x x is coming, welcome x x sentence.
3. Create a scene to understand the content of the poem. Please tell those children who are there. What skills and characteristics do they have? Through the children's discussion, the teacher summed up four skills of this insect. See if we're together. Guide the children to see the courseware.
4, the game "see who flies fast", according to the different characteristics of flying insects fly to the corresponding screen.
5, learning poetry, the teacher asks questions with pictures, and the children answer questions in the form of filling in the blanks. The teacher demonstrates reading and pays attention to the intonation of the questions.
6. Appreciate in sections and guide children to read the intonation of questions.
7. Divide the children into two groups: one group reads the questions and the other group reads the answers.
8. Creation: Combining the above learning forms, teachers guide children to create a children's song "What is Round".
What is round and red? The sun is round and red.
What are round and banging? The small drum is round and drumming.
What is round and elastic? The ball bounced around.
What is floating in the air? The balloon is round and floats in the air.
Use nursery rhymes:
What bugs are busy collecting honey every day?
What bugs love to wear flowery skirts?
What insect flies like an airplane?
What bug has a small lantern?
Bees are busy collecting honey every day.
Butterflies like to wear flowered skirts.
Dragonflies fly like airplanes.
Fireflies carry a small lantern.
9. You can also use the melody of music to organize children to sing and answer.
3. When someone asks you, "Who are you?"
When someone asks you, "Who are you?" How to answer depends on who the other person is.
1. If the other person is a leader, just answer your name directly and briefly introduce your work unit.
2. If the other person is a relative of the elder, then directly answer his name, or his nickname, and introduce his relationship with the elder.
3. If you have never met before, you should introduce your name and position for work, mutual visits, parties, dinners and other occasions.
4. If the other person should know himself or ask "You are" rudely, the answer at this time should be: "What, don't you know me?" .
In short, under such circumstances, we should be flexible and witty, and we should neither lose grace nor lose face.
4. Ask questions quickly. Ask more questions about common sense of life.
Part I: Simple questions
1
Japanese shoe size
240
What is the size of our shoes in Europe? (
B
)
A
、
$3.75 billion
、
38 degrees celsius
、
40
2
, carbohydrate refers to (
C
)
A
carbon dioxide
B
, protein
C
, sugar
three
The net content of a can of Sprite is (
A
)
A
、
355 ml boron
、
320 ml c
、
325 ml
four
、
Where is the folk song "Shandandan Blossoms Red" (
B
)
A
, Sichuan
B
, northern Shaanxi
C
, Shaanxi
five
The trace elements in apples that enhance memory are
(
C
)
A
, iron
B
, iodine
C
, zinc
six
Eating too much popcorn from the hand popcorn machine will lead to (
A
)
A
lead poisoning
B
iron poisoning
C
Mercury poisoning
seven
In order to prevent heatstroke, work in the hot sun or sweat too much in summer.
Drink more (
B
)
A
, sugar water
B
Salted boiled water
C
, boiling water
eight
When is the best time to add iodized salt in cooking to reduce iodine loss? (
C
)
A
After cooking and adding water
B
Use iodized salt to explode the pot before boiling water.
C
When the dishes are about to be cooked.
nine
In a person's life, the most critical period of brain development is (
A
)
A
Fetal period and infancy
B
, infancy and childhood
C
Puberty and infancy
5. Ask 100 questions, geography, history, life, computers, anything.
1. What does Bo Gongying rely on to spread seeds? -The wind,
2. What is the most abundant life in the ocean? -plankton,
When was the electronic computer invented? - 1946,
4. According to the latest achievements of modern physics research, the smallest constituent unit of matter is:-quark,
5. What's the name of the "meter" box on China chessboard? -Jiugong,
6. When did China's labor law come into effect? -1995 65438+ 10/0/,
7. The anthology in "The anthology is bad, the scholar is half" refers to:-A book,
8. The famous heroic epic "Jianger" is the work of which nation in China? -Mongols,
9. Why are most white people blond? -There's a lot of titanium in your hair,
10. The largest freshwater lake in China is:-Poyang Lake,
1 1. The earliest country in the world to make wine is:-Egypt,
12. China dinosaur museum is located in Zigong, Sichuan.
13. The largest plain in the world is:-Amazon Plain,
14. The birth and death years of Lu Xun are-188 1, 1936 respectively.
15. Isn't one of the eight masters in Tang and Song Dynasties-Li Bai,
16. what is called the "reptile age" is the Mesozoic.
17. The letter with the highest frequency in English words is -e,
18. What animals do bats belong to-mammals,
19. The region with the highest natural population growth rate is sub-Saharan Africa.
20. The first unequal treaty in China's history was the treaty of nanking.
2 1. The Mariana Trench, the lowest point in the world, is located in the Pacific Ocean.
22. When we look at the crystal clear water, we feel that the water depth is shallower than the actual depth.
23. The ancestor of the Qing Dynasty was Kangxi.
24. The following book is not China's famous condemnation novel in the early 20th century-The Scholars.
25. Cancel the Prime Minister and set up six departments. Which dynasty was it:-Ming Dynasty,
26. What color clothes to wear in the sun can reduce the damage of ultraviolet rays to the skin. Red,
27. What kind of material has antibacterial ability? -A wooden chopping block,
28. How about sunning underwear? I don't know,
29. Why does it feel so quiet on snowy days? -Snow absorbs sound waves,
According to custom, the ring on each finger contains specificity and meaning. This is a silent language. People who are already in love should wear a ring on:-middle finger,
3 1. What sound is most beneficial to health? (multiple choices)-the rustling of leaves, the singing of birds in the forest, the beating of waves, the dripping of streams,
32. Why does the night pearl shine at night? -the movement of electrons in minerals,
33. Correct treatment after biting the thermometer:-Eat a few egg whites,
Scientific experiments have proved that there is a colorful layer of light around the human body, which is the mysterious "light of the human body". -15mm,
film