Extra Education

 Why do volcanoes erupt? A volcano erupts due to the degassing of magma.    Magma is a thick mass of molten rock with gases and water vapor. It accumulates in what are called magma pockets, which form as a result of the movement of lithospheric plates. They are most likely to be located along the collision line of the plates.    If liquid magma erupts to the Earth's surface, a volcanic eruption begins. Frequently, a volcanic eruption is accompanied by powerful explosions; these are caused by the degassing of magma and the explosion of combustible gases.

Why is a rainbow shaped like an arc? A rainbow is an optical phenomenon, the result of the light rays refracting in water droplets when it rains.   Not everyone is aware that a rainbow is a circle. Its center lies on a straight line that runs from the Sun through the observer. Seeing the optical phenomenon completely to a person standing on the ground is prevented by the horizon.

 Why are newspaper articles written in columns? Weekly newspapers first appeared in Europe in 1650, at that time they cost an indescribably large amount of money, so publishers wanted to justify the cost of the publication and to contain as much information as possible.   In printing, the font used to be exceedingly small so that it was easy to read, with text printed in columns.

 Why is it better to breathe through the nose in the cold? The nasal cavity exhibits a unique ability to raise or lower the temperature of inhaled air. When it is -25 C outside, the air in a person's nasal cavity heats up to +35... +36,6 С. As opposed to the oral cavity, the nasal one heats the air much more effectively. It is like a built-in split system that ensures normal functioning of the lower respiratory tract.

Why are there lines on the palm? The palm folds, serve to clench and unclench the fist, grasp and hold various objects in the hand.   Also, these lines are necessary so that the skin on the hands is not stretched, but elastic and you can perform any movements.

Why are horses' legs not tired when they sleep standing up? The unique bone and ligament system of the horse's legs can support its weight without the slightest muscle strain. Therefore, no energy has to be expended by the horse during sleep. It can be said that their knee is equipped with a special mechanism that secures the joints in a stationary postion. ----- Last Updated : Nov 23, 2021

Why don't ducks get wet or freeze in winter? A duck applies and distributes a special fatty grease, which is secreted by the coccygeal, all over its body. It keeps them dry. As for the extra warm fur and subcutaneous fat, it keeps the cold from penetrating the duck's body. That's why ducks are warm in any frost and can take off even after long " water procedures" as their feathers stay dry. ------ Last Updated: Nov 23, 2021

Why a person can't sleep standing up? The human body tends to be far too flexible to sleep standing up. As we sleep, some brain functions literally shut down. Constant work of the muscles, muscle receptors and vestibular apparatus during sleep is impossible.   Therefore, a person who falls asleep standing up will immediately fall down.

Q. Why does chocolate turn white? Many people are wary of this white coating that resembles mold. But it's not mold and it won't harm your health. If not stored properly, the oil in the cocoa bean protrues onto the surface of the chocolate product and turns a whitish color. This could be proof that the chocolate really does contain cocoa beans and not their substitues. ------ Last Updated : Nov 23, 2021

Q. Why do men and women dream differently? Sleep is a complex mental process , a reflection of thoughts, desires in certain pictures, which regulate the subconscious. As men's and women's psyches vary, dreams are also different. Men's dream tend to have more aggressive content and are full of physical activity, while women's dream contain more conversation and emotion. ------ Last Updated : Nov 18, 2021