What are the questions that can be asked in the Dalton lesson plan?

Correct Answer: a

The first to officially use the term "class" was Erasmus, a famous educator of the Renaissance.

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Answer:

The earliest prototype of the country's adoption of class organization began in 1862 with the Jingshi Tongwen Museum opened in the Qing Dynasty.

Choose a, routine management.

It is the regular management of the class to manage the regular activities of the class by formulating and enforcing rules and regulations.

Have you found a bug in the Dalton story? Let's restore the truth of color blindness!

Once, Dalton's mom bought a pink sock for the piercing. But Dalton says it's a gray sock. Dalton was very puzzled by this, so he asked a lot of people around him.

Except that the point of view with his younger brother is the same. Later, he posted an a** that I knew. I have color blindness.

First of all, the perception of color is not by someone telling you what color it is, and then you remember and recognize the cognition of color is included in language learning, that is, when Dalton with red-green color blindness discovers color blindness, he already has a more correct understanding of other colors other than red and green colors, that is, the gray he sees may be the red, green, and gray that other people see. In the previous life, such discrepancies were ignored for various reasons, until the sock buying incident made Dalton realize this, and thus discovered color blindness.

Dalton, a famous English chemist and physicist in the 18th century, bought a gift on Christmas Eve - a pair of "brownish-gray" socks for his mother. When my mother saw the socks, she felt that the colors of the socks were too bright, so she said to Dalton, "How can I wear these cherry-red socks you bought?"

Dalton wondered why his mother said they were cherry red, so the socks were brownish-gray. Puzzled, Dalton went to ask his brother and the people around him, and except for his brother, who shared his opinion, everyone else who was asked said that the socks were cherry red. Dalton did not let go of this little thing easily, and after careful analysis and comparison, he found that he and his brother's color vision were different from others, and it turned out that he and his brother were both color blind.

Although Dalton was not a biologist or medical scientist, he became the first person to discover color blindness, and the first person to be found to have color blindness. For this reason, he wrote an article "On Color Blindness" and became the first person in the world to raise the problem of color blindness. Later, in his honor, people called color blindness Dalton's disease.

Color blindness is divided into congenital color blindness and acquired color blindness, congenital color blindness is sex-linked inheritance, more males than females, binocular vision function is normal and color discrimination is abnormal. Patients often have no difficulty distinguishing colors, which is found on examination. Acquired color blindness is mostly secondary to some fundus diseases, such as some optic nerve and retinal diseases.

Monocular color vision disorder is seen in ** retinodegeneration or optic neuropathy, with significant visual involvement and corresponding color vision involvement. Binocular color vision impairment can also be caused by drug poisoning. Refractive interstitial opacities, such as corneal leukosis and cataracts, can cause poor color discrimination.

Male color blindness rate in our country:

Female color blindness rate in our country:

Frequency of carriers of color blindness genes in our country :

Color blindness is the absence or complete absence of the ability to distinguish colors. Color blindness is often referred to as red-green color blindness. In the face of a colorful world, how do people perceive it?

It turns out that there is a photoreceptor cell on the human retina, the cone cell, which has three types of photoreceptor pigments: red, green, and blue. Each photosensitive pigment excites mainly one primary color light, and reacts to the other two primary colors to varying degrees. If a pigment is deficient, a sensory impairment of that color can occur, manifesting as color blindness or color weakness (poor color discrimination).

Color blindness is divided into many different types, and those who lack the ability to distinguish only one primary color are called monochromatopsis, such as red blindness, also known as first color blindness, which is more common; Green color blindness, known as second color blindness, is less common than first color blindness; Blue color blindness, or third color blindness, is relatively rare. If there is a lack of discrimination between two colors, it is called total color blindness, which is rare. Color blindness is mostly caused by congenital inheritance, and a few are caused by disorders of the visual pathway.

Generally it is passed on by women and manifested by men. According to statistics, the incidence of color blindness is 5 in men and 1 in women. People with congenital color vision disorder are often unaware that they have abnormal color discrimination, and most of them are discovered by others during physical examination.

All workers engaged in transportation, fine arts, chemistry, medicine, etc., must have normal color vision, so color vision examination has become a routine item during military service, employment, and pre-school physical examinations.

You can refer to the high school biology book on this.

John? Dalton, an English chemist and physicist, was born in 1766 in northern England. He proposed the law of conservation of mass, the law of proportion, the law of equivalence and the law of multiplication, introduced the concept of atomic weight, and proposed the Dalton atomic theory, which is different from the ancient Greek atomic theory.

In 1794, he wrote an essay entitled "Abnormal Facts About Color Discernment", revealing for the first time the secret of human color blindness. Later, he left his last words, "When I die, I want to take my eyeballs out for research."

Dalton published 116 scientific papers during his lifetime. But his experimental techniques were not top-notch. Many of his experimental instruments were self-made, and the experimental data obtained were not very accurate.

He had a physical defect such as "color blindness", but he succeeded. Dalton once said in his later years: "If people think that I have achieved greater success than my predecessors, it is mainly — no!"

It was all about continuous diligent study and study. ”

As a result of long-term exposure to mercury, Dalton developed chronic mercury poisoning. In the early morning of July 29, 1844, Dalton died at the age of 78 with his long-ailment body.

It does not have 8-stage filtration at all, it is an activated carbon, plus discounted film, KDF is used too much, and the copper xin exceeds the standard.

I don't know about the Dalton Water Purifier.

(2) A very small number of particles have been ** back, indicating that something with a lot of mass has been encountered, that is, the mass of the nucleus is very large; Most particles can pass through the gold leaf without changing the original direction of travel, indicating that the volume of the nucleus is very small, and the space outside the nucleus is large.

3) A small part changes its original direction, and because the particle is positively charged, it changes direction when it encounters a positively charged particle;

4) There are three types of particles that make up matter: molecules, atoms, and ions; Not all matter is made up of atoms;

Atoms can be divided into nucleus and extranuclear electrons; It is not an indivisible solid sphere; None of the above corresponds to the facts proven by modern scientific experiments

5) The number of nuclear charges of the gold atom is 79, and the number of electrons outside the nucleus of the gold atom is 79; The relative atomic mass is 197, so the number of neutrons = 197-79 = 118

Therefore, the answer is: (2) the particle passes through the voids within and between atoms;

3) The particle hits the gold nucleus and bounces back (or the particle hits the positively charged, massive, small gold nucleus and bounces back);

4) There are three types of particles that make up matter: molecules, atoms, and ions; Not all matter is made up of atoms;

Atoms can be divided into nucleus and extranuclear electrons; It is not an indivisible solid sphere;