Exercises about Brazilian metropolises –

The IBGE – Brazilian Institute of Geography and Statistics – is based on criteria, such as size and national projection, that certain urban centers have to categorize them as “metropolises”. Based on the information above, select the alternative that only names of metropolises appear. a) Manaus, Belém, Fortaleza, Recife, Salvador, Curitiba and Goiânia. b) Rio […]

Example of decomposition reaction. Decomposition reaction – Educador

Inorganic reactions are of four basic types: 1. Synthesis or addition reactions; two. Decomposition reactions or analysis; 3. Metathesis or double exchange reactions; 4. Oxidation-reduction or simple exchange reactions. When explaining this content to the class, the teacher may have difficulty demonstrating to students how these reactions occur in practice. Therefore, here in this text, […]

Light as a particle. Study of light as a particle –

In order to better understand which model is used to understand the reflection and refraction of light, we must go back a little in history. Although Galileo and Isaac Newton, based on mechanics, were able to explain both simple and complex movements (such as, for example, the movement of the planets), several scientists, at the […]

Cow’s milk protein allergy (CMPA) –

Cow’s milk protein allergy (CMPA) is a type of food allergy that mainly affects genetically predisposed children. This allergy can be caused by different proteins contained in milk, however, the fraction that causes the most allergic problems is beta-lactoglobulin. CMPA happens when our body identifies milk protein as an invading organism and produces antibodies to […]

Exercises on atmospheric pressure –

(Cotuca) It is known that atmospheric pressure decreases with altitude, and this decrease causes changes in the behavior of the human organism. At a height of approximately 2500 m above sea level, the human body may experience an increase in heart rate, headache, nausea, difficulty breathing, among other symptoms. The following graph provides the behavior […]

Operation Valkyrie: the plan to kill Hitler –

The term «Operation Valkyrie» (in German: Operation Walqure) ended up becoming popular as a synonym for a plan to assassinate the leader of Nazism, Adolf Hitler, as if it were an operation designed strictly for this purpose. In fact, “Operation Valkyrie” was prepared by the German army itself (Wehmarcht) in 1941, with the knowledge and […]

Yellow Test – Question 60 –

In a speech given on March 17, 1939, the English Prime Minister at the time, Neville Chamberlain, supported his political position: “I do not need to defend my visits to Germany last autumn, what alternative was there? Nothing we could have done, nothing France could have done, or even Russia, would have saved Czechoslovakia from […]