Children ‘s science questions Do snakes have a neck?

Children’s science questions also consider the difference between the day of the day and the day of the father, the dream of the blind, and the perpetual standing of birds. And why do things look bigger in water than on land?

The ridge must have an recognizable pattern on the back.

Elsa Englund, 8

With snakes on the neck. Its main function in snakes and other vertebrates is to allow the head to be turned and food to be transported to the stomach and oxygen to the lungs.

The neck of the snakes begins behind the lower jaw and ends at the sternum. However, separating their necks by looking is not very easy because the snake’s neck and middle body are practically the same size.

If the snake is in place, its neck will often stand out more clearly. Namely, it monitors its surroundings by turning its head around its neck.

The flexibility of the animals’ necks is limited by hard bones, or vertebrae. With snakes, those cervical vertebrae, like human vertebrae, turn well. Windings develop a few less cervical vertebrae than humans, which makes their necks shorter.

Vesa Paajanen

University Lecturer in Animal Physiology

University of Eastern Finland

Mother and child ate Mother’s Day breakfast in Espoo on Mother’s Day 2020

Why is Mother’s Day in the plural, but not Father’s Day?

Pyry Pilke, 9

Mother’s Day and Father’s Day celebration is from the United States. Mother’s Day came to Finland first. It has long been used by three different names: Mother’s Day, Mother’s Day, and Mother’s Day.

The problem with Mother’s Day has been the letter d, which has been difficult for many infants and dialect speakers to pronounce. The old-fashioned plural form of the word mother with mothers, on the other hand, has been foreign to many modern Finns. Thus, a problem-free Mother’s Day in all respects has inherited a victory in common language use.

A similar variety of designations has prevailed for Father’s Day. Initially, the words Father’s Day, Father’s Day, and Father’s Day have been used. Of these, Father’s Day has become the most popular, as many think that the first part of Father’s Day has sounded too old-fashioned and solemn. My father, on the other hand, has been reminded of the pampering form of the word father.

Father’s Day is also exactly in line with the international model. In American English, the names are usually Mother’s Day and Father’s Day, both of which have the first part of the name in the unit.

Kaisa Häkkinen

Professor of Finnish

University of Turku

If a person does not see, he will not be left with visual memories.

Do blind people dream of pictures and colors? If so, how is that possible?

Oona Sareskoski, 9

Each our senses specialize in receiving information about our environment through receptors, or recipient cells.

The cells of the visual sense are at the base of the eye. They are called pin and rod cells. They receive information that is converted into nerve impulses in the optic nerve leaving the fundus. They are used to form visual observations when the brain processes that information.

Our brains record visual observations, as well as other sensory observations, memories or memories that are also activated when we dream. If a person is blind from birth, he or she has no visual memory images at all because he or she has never experienced visual sensations.

If a person has become blind later in life, he or she has usually had time to capture visual sensations. They may then become unique at least for some time until the images fade.

Teija Kujala

professor of psychology

university of Helsinki

In the water, everything looks a little different.

Why do some things look bigger in water than on land?

Aino Taimi, 9

When we look at an object, we see it because the object reflects the light that hits it into our eyes. How large the viewer looks depends on the angle at which the light rays from the extreme points of the object reach the eye. The wider that angle, the larger the object looks and vice versa.

This is always the case when the subject and the viewer’s eyes are both in the same medium, as in the air. But when an object like a fish is viewed in the water through diving glasses, the eyes are in the air and the fish in the water. In this case, it is viewed through both water and air.

The rays of light reflected from the object of view are refracted at the boundary between air and water. In this case, the extremes from even the small fish appear at a large angle, and the fish looks large. The phenomenon only occurs if the eyes are close to the air-water boundary. This happens whenever you dive with a diving goggles or mask on your head.

The same happens when you look at the fish very close to the glass of the aquarium. If the eyes are further away from the water and glass, the light rays are not refracted in any significant way.

Tom Kuusela

University Researcher in Physics

University of Turku

The birds ’feet have a mechanism that allows the foot to seem to lock in a standing position. Sea buckthorn (Haematopus ostralegus).

Why don’t the birds sit? how do they manage to stand all the time?

Vuokko Hänninen, 10

Birds the structure of the legs is very different from that of a human. The knee-like bend visible in their legs is not the knee but the ankle from which the lower leg rises. The knee is usually only located inside the plumage.

Between the toes and the ankle, on the other hand, are the bones of the foot that have grown together and stretched long. Because of these leg structures, birds rarely sit aft on the ground.

Instead of sitting, birds often rest on the ground in a position similar to a human squat, for example. It fits the structure of their legs better. In the squat position, the birds seem to be lying on the ground on their stomachs.

A bird perched on a branch or other narrow surface is also usually squatting. If the birds properly reserved weight on the stern side, they would fall.

The muscles, ligaments and tendons connected to each other in the birds’ legs form a locking mechanism. It is similar to horses that are able to sleep while standing. Thanks to the lock, not much energy is consumed. This allows the birds to sleep even with just one leg.

Aleksi Lehikoinen

superintendent

Creation

Send the question, the full name and age of the questioner to hs.tiede@hs.fi. The column will be edited by Touko Kauppinen and Juha Merimaa.

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