Natural Sciences (3)

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Fossil fuels are the raw material for energy production. They are non-renewable natural resources, originating from organic debris accumulated in the earth's crust over millions...

Endocytosis and exocytosis are two substance transport processes that involve the entry and exit of large particles from the cell. Endocytosis: is the process of entry of particles...

Nitrogen is a gas found in abundance in the air (about 78%) in the form of N2, but because it is not chemically reactive, it remains free and is not easily assimilated by beings. Too...

Geological Ages correspond to the geologists' designation of a phase in the Earth's history. The history of our planet, which is about 4.6 billion years old, was divided by geologists into...

Levitation, sieving and ventilation are methods of separating heterogeneous mixtures. Through levigating and ventilation it is possible to separate the denser substance from the less dense...

The plant parts are: root, stem, leaf, flower, fruit and seed. Plants are living things and, like people, they too are born, grow, reproduce and die. The difference is that...

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Nerve impulse transmission is an electrochemical phenomenon that occurs in nerve cells and makes the nervous system work. It is the result of changes in electrical charges on the membrane of...

The hydrosphere is the layer of water on the Earth's surface that includes from rivers, lakes and oceans to groundwater, glaciers and atmospheric water vapor. It's a layer...

Mars is the fourth closest planet to the Sun and the second smallest planet in the solar system, after Mercury, and is considerably smaller than planet Earth. It has a color...

The Paleozoic Era took place between 542 and 241 million years ago. Among the remarkable facts of this phase on Earth is the first record of the occurrence of animals with mineral parts, shells and...

The rock cycle is a cyclical, continuous and infinite natural phenomenon, which involves the processes of transformation of rocks over time and which occur through erosion or...

The layers that make up the planet Earth's atmosphere are: Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere. The planet Earth's atmosphere involves the gases that are part of the planet and...

Animal metamorphosis is the process of change in body shape and structure, which they undergo to complete their development. What Does Metamorphosis Mean? Metamorphosis is a Greek word...

Arachnids are a group of invertebrate animals represented by spiders, scorpions, harvestmen, mites and ticks. They are grouped in the class Arachnida, belonging to the phylum Arthropoda,...

The stem is a part of the plant that mainly has the function of conducting substances and sustaining. It is an organ that, together with the leaves, makes up the stem system. The stems and their...

The Mesozoic Era is also called the Age of Dinosaurs and lasted between 248 million to 65 million years ago. It is divided into three periods: Triassic, Jurassic and Cretaceous. In the event...

Atmospheric pressure is the force exerted by the mass of gases in the atmosphere on a given surface. The atmospheric pressure value is not constant. It varies depending on the altitude of the...

Fertilization or Fertilization is one of the stages of sexual reproduction, in which the sex cells or gametes unite, originating the zygote or egg cell. The zygote goes through many divisions...

The giant otter is a mammalian animal endemic to South America. Its scientific name is Pteronura brasiliensis. It is considered one of the largest carnivores in the South American subcontinent. The expectation...

Scavenging is a method of separating solid heterogeneous mixtures. This process, which separates solid substances from other solid substances (solid + solid), is made of...

Oxygen (O2) is the most abundant element on the planet, being available in the atmosphere, water and the earth's crust. It is capable of reacting with almost all chemical elements, especially the...

The vacuoles are cellular structures surrounded by plasma membrane, very common in plants and also present in protozoa and animals. It has different functions such as: regulating pH, controlling...

The lithosphere is the outermost part of the Earth. It is a rocky layer, which varies in thickness in mountainous regions and at great marine depths, formed by the crust (terrestrial and oceanic) and...

Renewable energy is energy obtained from sources that regenerate spontaneously or through adequate human intervention. The rapid depletion of energy sources, mainly from...

Drinking water is all water suitable for consumption. Water is a colorless, odorless (odorless), tasteless (tasteless) and tasteless (saltless) liquid, essential for human survival. He must...

Coal is a fossil fuel widely used today in steel mills and thermoelectric plants for energy production. It is a non-renewable natural resource originating from the remains of...

Radioactive or Nuclear Pollution designates the pollution generated by radiation (radioactive materials). It is considered the worst type of pollution, as it is the most dangerous for the planet. At...

Atmosphere is the layer of air that surrounds our planet. Other planets in the solar system also have an atmosphere. The gases that make up the atmosphere are held around the Earth due to...

Flotation is a method of separating solid and liquid heterogeneous mixtures. For this purpose, air bubbles are inserted into the liquid, in which one of the elements adheres and ends up separating...

In nature there is a constant flow of energy and organic matter that is essential for the maintenance of life. All living organisms participate in these processes through food chains,...

The ocelot is a mammal of the feline family. Native to America, it is considered the third largest feline on the continent, after the jaguar and the puma. Its scientific name is Leopardus...

Flatworms are the name of a group of soft-bodied, usually flat-bodied worms, which are mostly parasites of other animals, although there are some free-living ones. Flatworms are animals...

The Sun is a star located at the center of our solar system. Its gravity keeps rotating in its orbit from the biggest planets to tiny debris particles. Inside the Sun are...

Crustaceans are invertebrate animals belonging to the arthropod phylum. Examples are shrimp, lobsters, barnacles, crabs and crabs, which live in an aquatic environment (fresh water...

Leukocytes, also called white blood cells, are blood cells produced in the bone marrow and lymph nodes. They are the main agents of our body's immune system, being...

What is winter? Winter is one of the four seasons of the year, beginning in late autumn and ending in early spring. In Brazil, it starts on the 20th or 21st of June and ends on the day...

The soil is the layer that covers the earth's surface and is basically formed by organic matter and inorganic matter (solid components) through the action of climatic factors and...

Neurons are the nerve cells responsible for propagating the nerve impulse. They make up the nervous system along with the glial cells. There are about 86 billion...

Filtration is a method of separating heterogeneous solid-liquid and gas-solid mixtures. It is the most common method of separating an insoluble solid from a liquid. At the...

Gametes are the sex cells of all living things. All sexually reproducing organisms need to produce gametes, both plants and animals. There are male gametes that are...

Hearing is one of the five senses in the human body and allows us to hear. Its main organs are the ears (formerly called “ears”). The fact that we have an ear on each side of...

Alternative energy sources bring together the forms of energy production that cause less environmental impact on the planet and are therefore little polluting. Alternative energies are derived from...

Spring starts every year between September 22nd and 23rd and ends between December 21st and 23rd. Thus, this season starts right after winter and ends with the arrival of summer,...

The mesosphere is one of the layers of the Earth's atmosphere, immediately below the thermosphere and above the stratosphere. It is 80 km high from the Earth's surface and has...

Polluted rivers are those springs that receive in their waters all kinds of polluting residues such as chemical, physical and biological agents. They are harmful to the soil, fauna, flora and...

Parasitism is a disharmonious ecological relationship, that is, an interaction between living beings in which one party benefits from getting food while the other is...

Alchemy is a practice of a mystical character that flourished during the Middle Ages, bringing together science, art and magic. One of his main goals was to obtain the elixir of life in order to guarantee...

Proton (p+) is one of the small particles that make up the atom, which is the smallest particle of a chemical element. The proton, or proton (according to European Portuguese), is formed by three...

Precambrian is the appellation of the greatest division in geological time on Earth, hence it is called the Super Aeon, and predates the Phanerozoic Aeon. Corresponds to the set of eons: Proterozoic,...

The troposphere is the lowest layer of the Earth's atmosphere, being the region in which we live and where meteorological phenomena occur. Its height varies according to the point of distance from the...

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Exosphere: what it is and characteristics

Exosphere: what it is and characteristics

The exosphere is the name of the outermost layer of the Earth's atmosphere from the surface, bein...

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Summer: early summer and its main characteristics

Summer: early summer and its main characteristics

What is summer?Summer is one of the four seasons of the year that begins after spring and ends wi...

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What Are Planets?

What Are Planets?

You planets are heavenly bodies no light and own heat, solid, rounded and with self-gravity, whic...

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