Amoeba is one of the most famous simple single-celled organisms and is an important object for the study of biologists. Understanding how the simplest unicellular organisms exist and function will help us to learn the very beginning of a long evolutionary path. What is the structure of the amoeba, its habitat? How does the amoeba eat? Read more about this in our article.
Fusion is the process of transforming a body from a solid to a liquid state under the influence of temperature. A classic example of fusion from life is the melting of ice, its transformation into the water, or the transformation of a solid piece of tin into a liquid solder under the action of a soldering iron. The transfer to a body of a certain amount of heat can change its state of aggregation; this amazing property of solids to turn into liquids under the influence of temperature is of great importance for science and technology. Scientists (as well as technicians, engineers) need to know at what temperatures certain metals melt (and sometimes not only metals), and for this, such a concept as “enthalpy of fusion” has entered into physics.
The raccoon is one of the funniest representatives of mammals. Raccoons are very mischievous and at the same time sociable, peaceful and friendly, they easily make contact with a person. They are infinitely curious and the smartest among animals along with dolphins, monkeys, elephants, cats, and dogs.
Since ancient times, people have been observing our beautiful starry sky, uniting various stars in groups – constellations. The names of mythical heroes, sometimes fabulous creatures, and sometimes real were given to constellations. One of such constellations was the Leo constellation, in the outline of which our distant ancestors saw the majestic “king of beasts.” The Leo constellation is one of the brightest and most beautiful on our horizon.
Inertia in physics is the ability of bodies to maintain a state of motion for a certain time in the absence of external forces. However, the concept of inertia is often used not only in physics but also in our daily lives. For instance, the inert person is the person who does not show any initiative at all. Inert persons only do what others tell them, and they do it extremely slowly, without any enthusiasm. “It moves by inertia,” we say when we want to emphasize that something is being done without any meaning, but simply because of a habit acquired over the years. Thanks to such everyday examples the concept of inertia is clear, but the term “moment of inertia” requires a more detailed explanation.
The golden eagle bird was a symbol of courage and nobility from ancient times. The ancient Greeks personified the golden eagle (the largest of the eagles), with the supreme god Zeus himself. All thanks to the magnificent appearance of this bird, and its amazing ability to fly for hours in the air, looking for potential prey.
The Avogadro law was formulated by the Italian chemist Amadeo Avogadro in 1811. It had great importance for the development of the chemistry of that time. However, Avogadro’s law has not lost its relevance and significance even today. Let’s try to define Avogadro law; it will sound something like this.
Brownian motion (or Brownian movement) is the chaotic and random motion of small particles (usually molecules) in different liquids or gases. The cause of Brownian motion is the collision of small particles with other particles. What is the story of the discovery of Brownian motion? Why is Brownian motion so important in physic and chemistry? What are some examples of Brownian motion in real life? Read about all this in our article.
Fleas are one of the most famous small parasitic insects. Most of the harm and trouble they cause to our pets: cats and dogs, but can also be dangerous for humans, since in some cases fleas can be carriers of dangerous diseases, such as pseudotuberculosis, listeriosis, and tularemia. What are the habits of these little parasites? What does a flea look like, where does it live, how to deal with fleas? Read this in our article.
Oxygen plays a leading role among all the known chemical elements. Life on our planet wouldn’t arise without oxygen. Oxygen is the most common chemical element on Earth, accounting for 49% of the total mass of the earth’s crust. Oxygen is also part of the Earth’s atmosphere; part of the composition of water, and the composition of more than 1,400 different minerals, such as basalt, marble, silicate, silica, etc. About 50-80% of the total mass of tissues, both animals and plants, consists of oxygen. The important role of oxygen for the breathing of all life is well known.