Semester (Science, English, Maths) 7-8 2019
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He developed the theory of universal gravitation; how the force that pulls two objects together depends on the mass of each object. He applied this theory to the planetsʼ places in the universe.
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Thomas Edison (1791-1867)
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Albert Einstein (1879-1955)
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Isaac Newton (1642-1727)
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About This Quiz
The SEMester (Science, English, Maths) 7-8 2019 quiz covers topics from scientific theories and discoveries, including Newton's law of universal gravitation and the Nobel Prize, to mathematical problems related to Dmitri Mendeleev. This quiz aims to enhance understanding and appreciation of pivotal scientific and mathematical concepts.
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- 2.
A Nobel Prize is an international reward awarded in ...
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Sweden
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Norway
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Denmark
Correct Answer
A. SwedenExplanation
The Nobel Prize is an international reward awarded in Sweden. The Nobel Prizes were established by the will of Alfred Nobel, a Swedish inventor, engineer, and industrialist, and they are awarded annually in recognition of outstanding achievements in various fields such as physics, chemistry, medicine, literature, peace, and economic sciences. The Nobel Prize ceremony takes place in Stockholm, Sweden, and is attended by members of the Swedish royal family and distinguished guests from around the world.Rate this question:
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- 3.
The Nobel Prize consists of ...
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A medal and a diploma.
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A medal and a sum of money.
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A medal, a diploma and some money.
Correct Answer
A. A medal, a diploma and some money.Explanation
The Nobel Prize consists of a medal, a diploma, and a sum of money. This means that the recipients of the Nobel Prize not only receive recognition in the form of a medal and diploma, but they also receive a financial reward. This combination of tangible and intangible rewards makes the Nobel Prize highly prestigious and sought after in various fields of achievement.Rate this question:
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- 4.
The prizes are awarded to scientists for outstanding achievements in ...
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Physics, chemistry, astronomy, medicine, and for work in peace.
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Physics, chemistry, medicine, literature, and for work in peace.
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Physics, chemistry, history, literature, and for work in peace.
Correct Answer
A. Physics, chemistry, medicine, literature, and for work in peace.Explanation
The correct answer is "physics, chemistry, medicine, literature, and for work in peace." This answer includes the fields of physics, chemistry, medicine, and literature, which are commonly recognized as areas of outstanding achievement and contribution to society. Additionally, it mentions the award for work in peace, which acknowledges efforts towards promoting peace and resolving conflicts.Rate this question:
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- 5.
The ceremony is held on 10th December because ...
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It is the birthday of the King.
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The committee meets of that day.
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Alfred Nobel died on that day.
Correct Answer
A. Alfred Nobel died on that day.Explanation
The ceremony is held on 10th December because Alfred Nobel died on that day. This date was chosen to commemorate his death and honor his legacy. Alfred Nobel was the inventor of dynamite and the founder of the Nobel Prizes, which are awarded annually in recognition of outstanding achievements in various fields. By holding the ceremony on the anniversary of his death, it serves as a reminder of his contributions to science and humanity.Rate this question:
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- 6.
Alfred Nobel 's invention was connected with ...
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Dynamo machine.
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Dynamite.
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Diamonds.
Correct Answer
A. Dynamite.Explanation
Alfred Nobel's invention was connected with dynamite. Dynamite was a high explosive that Nobel invented in the late 19th century. It revolutionized the construction and mining industries, as it provided a safer and more efficient way to blast through rocks and mountains. Nobel's invention of dynamite made him a wealthy man and allowed him to establish the Nobel Prizes, which are awarded annually in recognition of outstanding achievements in various fields.Rate this question:
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- 7.
What is force measured in?
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Joules
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Kilograms
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Newtons
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Pascals
Correct Answer
A. NewtonsExplanation
Force is measured in Newtons. Newton is the unit of measurement for force in the International System of Units (SI). It is named after Sir Isaac Newton and is defined as the amount of force required to accelerate a one-kilogram mass by one meter per second squared. Joules, kilograms, and Pascals are not units of measurement for force.Rate this question:
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- 8.
Galileo was the first man to prove that planets, the sun, and the moon all circled around Earth.
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True
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False
Correct Answer
A. FalseExplanation
Galileo was not the first man to prove that planets, the sun, and the moon all circled around Earth. In fact, he was the one who provided evidence to support the heliocentric model, which states that the Earth and other planets revolve around the sun. This model was proposed by Nicolaus Copernicus. Galileo's observations using his telescope further supported this heliocentric view, challenging the prevailing geocentric belief that the Earth was at the center of the universe. Therefore, the statement that Galileo was the first to prove planets, the sun, and the moon circled around Earth is false.Rate this question:
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- 9.
For his work Galilio bought the most superior telescope in Holland.
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True
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False
Correct Answer
A. FalseExplanation
The statement is false because Galileo did not buy the most superior telescope in Holland. He actually built his own telescope, which was far superior to any other telescope at the time. Galileo's telescope allowed him to make groundbreaking astronomical observations and discoveries, such as the moons of Jupiter and the phases of Venus.Rate this question:
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- 10.
He was sentenced to life in jail because he was teaching students his new theories.
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True
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False
Correct Answer
A. TrueExplanation
The correct answer is True. This is because teaching new theories is not a crime that warrants a life sentence in jail. Therefore, it is reasonable to assume that there must have been other factors or crimes involved in his sentencing, such as the potential harm or danger posed by these theories, or other illegal activities that he may have been engaged in.Rate this question:
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- 11.
He/she studied the structure of atoms and introduced the model that atoms have a positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus...similar to our solar system.
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Albert Einstein (1879-1955)
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Niels Bohr (1885-1962)
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Marie Curie (1867-1943)
Correct Answer
A. Niels Bohr (1885-1962)Explanation
Niels Bohr is the correct answer because he studied the structure of atoms and proposed the model in which atoms have a positively charged nucleus surrounded by electrons that orbit around it, similar to the way planets orbit the sun in our solar system. This model became known as the Bohr model and was a significant contribution to the field of atomic physics.Rate this question:
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- 12.
An inventor with over 1,000 patents, this scientist is responsible for many of the modern items we use every day, among which are the phonograph, the light bulb, motion pictures, and the alkaline battery.
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Thomas Edison (1791-1867)
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Albert Einstein (1879-1955)
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Marie Curie (1867-1943)
Correct Answer
A. Thomas Edison (1791-1867) -
- 13.
A politician and civic activist, this scientist and inventor is well-known for work with electricity and inventions such as the lightning rod, bifocals, and odometer.
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Marie Curie (1867-1943)
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Benjamin Franklin (1706-1790)
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Thomas Edison (1791-1867)
Correct Answer
A. Benjamin Franklin (1706-1790)Explanation
Benjamin Franklin is the correct answer because he was a politician and civic activist who was also a scientist and inventor. He is well-known for his work with electricity and his inventions such as the lightning rod, bifocals, and odometer. Marie Curie was a scientist known for her work in radioactivity, not electricity. Thomas Edison was an inventor known for his work in the field of electricity, but he was not a politician or civic activist.Rate this question:
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- 14.
A physicist and mathematical genius, this scientist is best known for the theory of relativity (all motion is relative) and the equation that proves such: E=mc2.
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Thomas Edison (1791-1867)
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Albert Einstein (1879-1955)
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Isaac Newton (1642-1727)
Correct Answer
A. Albert Einstein (1879-1955)Explanation
Albert Einstein is the correct answer because he is a physicist and mathematical genius who is best known for the theory of relativity and the equation E=mc2. This equation demonstrates the relationship between energy (E), mass (m), and the speed of light (c), and is one of the most famous equations in physics. Einstein's theory of relativity revolutionized our understanding of space, time, and gravity, and he is widely regarded as one of the greatest scientific minds in history.Rate this question:
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- 15.
The first person to be awarded two Nobel Prizes, this scientist discovered the elements Radium and Polonium, and created the theory of radioactivity.
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Thomas Edison (1791-1867)
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Albert Einstein (1879-1955)
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Marie Curie (1867-1943)
Correct Answer
A. Marie Curie (1867-1943)Explanation
Marie Curie is the correct answer because she was the first person to be awarded two Nobel Prizes. She discovered the elements Radium and Polonium and made significant contributions to the theory of radioactivity. Thomas Edison and Albert Einstein were both renowned scientists, but they did not make these specific discoveries or contributions.Rate this question:
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- 16.
He provided evidence for Copernicusʼ theory that the Sun is fixed in the center of our universe and the Earth and other planets revolve around the Sun.
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Niels Bohr (1885-1962)
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Albert Einstein (1879-1955)
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Galileo Galilei (1564-1642)
Correct Answer
A. Galileo Galilei (1564-1642)Explanation
Galileo Galilei is the correct answer because he provided evidence for Copernicus' theory of heliocentrism, which states that the Sun is fixed in the center of our universe and the Earth and other planets revolve around it. Galileo's observations through his telescope, such as the phases of Venus and the moons of Jupiter, supported this heliocentric model and challenged the prevailing geocentric view of the universe. His work was significant in advancing our understanding of the solar system and revolutionizing the field of astronomy.Rate this question:
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- 17.
Can you imagine your life without electricity? We're using it all the time, even when you're not thinking about it. What is the unit of electric current?
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Ohm
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Amp
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Volt
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Watt
Correct Answer
A. AmpExplanation
The unit of electric current is ampere (Amp). Ampere measures the rate at which electric charge flows in a circuit. It represents the amount of electric charge passing through a point in a circuit per unit time. Without electric current, electricity cannot flow and devices cannot function. Therefore, ampere is the correct unit for measuring electric current.Rate this question:
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- 18.
Light bulb was really a great invention. Which of the following does a light bulb do?
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Changes electrical energy into kinetic energy
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Changes electrical energy into light energy
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Changes light energy into electrical energy
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Changes light energy into thermal energy
Correct Answer
A. Changes electrical energy into light energyExplanation
A light bulb is a device that converts electrical energy into light energy. When electricity flows through the filament of the light bulb, it heats up and emits light. This process is known as incandescence. Therefore, the correct answer is "Changes electrical energy into light energy."Rate this question:
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- 19.
On the Periodic Table, elements that are in the same vertical column are considered to be in the same ....
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Period
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Row
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Group
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Category
Correct Answer
A. GroupExplanation
On the Periodic Table, elements that are in the same vertical column are considered to be in the same group. Groups are also known as families and they have similar chemical properties. Elements in the same group have the same number of valence electrons, which determines their reactivity and chemical behavior. Therefore, elements in the same group tend to exhibit similar characteristics and form similar compounds.Rate this question:
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- 20.
Elements in the same period have the same number of ........ .
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Protons
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Neutrons
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Energy levels
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Valence electrons
Correct Answer
A. Energy levelsExplanation
Elements in the same period have the same number of energy levels. The period number in the periodic table indicates the number of energy levels an element's atoms have. Each energy level can hold a specific number of electrons, and elements in the same period have the same number of energy levels, which determines their electronic configuration and chemical properties.Rate this question:
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- 21.
Which element is the lightest?
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Helium
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Nitrogen
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Hydrogen
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Neon
Correct Answer
A. HydrogenExplanation
Hydrogen is the lightest element because it has the lowest atomic mass among the options given. It consists of only one proton and one electron, making it the simplest and lightest element in the periodic table. Helium, nitrogen, and neon all have higher atomic masses compared to hydrogen, making hydrogen the correct answer.Rate this question:
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- 22.
Jan Berzelius was a scientist who suggested the initial letters of Latin names as symbols of chemical elements. What is the element symbol for tin?
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T
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Ti
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Sn
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W
Correct Answer
A. SnExplanation
Jan Berzelius suggested using the initial letters of Latin names as symbols for chemical elements. The element symbol for tin is Sn, which comes from the Latin name "stannum".Rate this question:
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- 23.
Guess the name of the metal. It is one of the first metals known to man. From the ancient times, the rare beauty of this metal attracted the human eye. The most aggressive acids are not able to dissolve it. It is called the king of metals.
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Gold
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Bronze
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Lead
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Silver
Correct Answer
A. GoldExplanation
Gold is the correct answer because it is one of the first metals known to man and has been valued for its rare beauty since ancient times. It is also known for its resistance to even the most aggressive acids, making it difficult to dissolve. Due to these qualities, it is often referred to as the "king of metals."Rate this question:
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- 24.
The element mendelevium is named after chemist Dmitri Mendeleev. What is the symbol for mendelevium?
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Dm
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Me
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Md
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Mt
Correct Answer
A. MdExplanation
The symbol for mendelevium is Md because it is named after chemist Dmitri Mendeleev.Rate this question:
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- 25.
Which of the following is an element?
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Pure water
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Steel
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Sugar
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Silicon
Correct Answer
A. SiliconExplanation
Silicon is an element because it is a chemical element with the atomic number 14 and symbol Si on the periodic table. It is a hard and brittle crystalline solid, and it is a fundamental building block of many minerals. Silicon is widely used in various industries, including electronics, as it is a semiconductor and has excellent thermal conductivity.Rate this question:
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- 26.
Guess the name of the chemical element. In the human body it constitutes about 3 grams, of which about 2 grams are in the blood. Prehistoric people began to use tools made of this substance starting from several millennia BC. In honor of this element, a whole period of human history was named.
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Iron
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Silver
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Gold
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Bronze
Correct Answer
A. IronExplanation
Iron is the correct answer because it is a chemical element that is found in the human body, particularly in the blood. It is estimated that the human body contains about 3 grams of iron, with 2 grams of it being in the blood. Iron has been used by prehistoric people as a material for tools since several millennia BC. Additionally, the Iron Age in human history is named after this element, further indicating its significance.Rate this question:
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- 27.
Sulphur Dioxide is ...
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A mixture of compounds
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An element
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A mixture of elements
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A compound
Correct Answer
A. A compoundExplanation
Sulphur Dioxide is a compound because it is formed by the combination of two elements, sulphur and oxygen. It has a chemical formula of SO2, indicating that it consists of one sulphur atom and two oxygen atoms. Compounds are substances composed of two or more different elements chemically bonded together, which is the case for sulphur dioxide.Rate this question:
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- 28.
What chemical element does not have a permanent residence in the Periodic System of Chemical Elements?
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Helium
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Nitrogen
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Hydrogen
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Neon
Correct Answer
A. HydrogenExplanation
Hydrogen is the chemical element that does not have a permanent residence in the Periodic System of Chemical Elements. This is because hydrogen, unlike other elements, does not fit neatly into any specific group or category in the periodic table. It has unique properties that make it difficult to classify, and its placement in the periodic table has been a subject of debate among scientists. Therefore, hydrogen is considered to not have a permanent residence in the periodic system.Rate this question:
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- 29.
About what substance Antoine de Saint-Exupery wrote “... You are the greatest wealth in the world ...”
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Water
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Gold
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Oxygen
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Iron
Correct Answer
A. WaterExplanation
Antoine de Saint-Exupery wrote, "... You are the greatest wealth in the world..." about water.Rate this question:
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- 30.
In a liquid the particles are arranged ....
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Regularly spaced and freely moving
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Irregularly and less tightly packed, they are free to move
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Regularly and tightly packed, they are not free to move
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Irregularly and very spaced out, they are free to move
Correct Answer
A. Irregularly and less tightly packed, they are free to moveExplanation
In a liquid, the particles are arranged irregularly and less tightly packed, allowing them to move freely. Unlike in a solid where the particles are tightly packed and fixed in position, the particles in a liquid have more space between them and can move around more easily. This explains why liquids can flow and take the shape of their container.Rate this question:
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- 31.
Albert Einstein was born in Germany in 1879. He started to speak when he was nearly 3 years old and found it difficult to communicate. At the Luitpold Gymnasium one teacher even told him that he ... any success in his life.
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Will never achieve
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Would never achieve
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Won't achieve
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Doesn't achieve
Correct Answer
A. Would never achieveExplanation
Albert Einstein was born in Germany in 1879 and had difficulty communicating at a young age. Despite facing challenges, one of his teachers at the Luitpold Gymnasium told him that he would never achieve any success in his life. This suggests that the correct answer is "would never achieve," indicating that the teacher believed Einstein would not be successful in his future endeavors.Rate this question:
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- 32.
Einstein made a lot of important discoveries, he continued ... optics and matter, but his Theory of Relativity and famous formula E=mc2 have really laid the foundations for future Scientific inventions.
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Studied
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To study
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To have studied
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Having studied
Correct Answer
A. To studyExplanation
The correct answer is "to study." This is because the sentence is referring to Einstein's actions in the past, specifically his discoveries and contributions. The phrase "to study" indicates his purpose or intention during that time period.Rate this question:
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- 33.
ORASTISTNR It is a semiconductor device used to amplify or switch electronic signals. It is an important component of many electronic devices such as telephones and computers. In 1925, Julius Edgar Lilienfeld, an Austrian-Hungarian physicist filed a patent for the principle of its work. Dr. Oskar Heil, a German physicist patented another one in 1947. ________
Correct Answer
TRANSISTOR, transistor - 34.
ROXEGHYRAP It is a technology of photocopying documents and visual images. Charles Floyd Carlson, an American physicist and inventor developed this technology in 1938. It was patented in 1942. Today, it is used in laser and LED printers as well as in photocopying machines worldwide. ________
Correct Answer
XEROGRAPHY, xerographyExplanation
Xerography, also known as xerography, is a technology of photocopying documents and visual images. It was developed by Charles Floyd Carlson, an American physicist and inventor, in 1938 and patented in 1942. Xerography is widely used today in laser and LED printers as well as in photocopying machines worldwide.Rate this question:
- 35.
CECSROMIPROSOR It is the central controlling unit of most of the digital devices as also computers and workstations. It was introduced in the 1970s. Following its introduction, there has been a continuous growth in its power and operational speed. ________
Correct Answer
MICROPROCESSOR, microprocessorExplanation
The given answer is "MICROPROCESSOR, microprocessor". The explanation for this answer is that the term "CECSROMIPROSOR" is likely a scrambled version of the word "MICROPROCESSOR". A microprocessor is the central controlling unit of most digital devices, computers, and workstations. It was introduced in the 1970s and has since experienced continuous growth in power and operational speed. Therefore, "MICROPROCESSOR, microprocessor" is the correct answer based on the given information.Rate this question:
- 36.
Dmitri Mendeleev always tried to start with the main points. In algebra you should always start with brackets! Remember that and find the value of (2(2(2(2(2(2+1)+1)+1)+1)+1)+1).
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70
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97
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127
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159
Correct Answer
A. 127Explanation
The given expression is a nested set of brackets with addition operations. Starting from the innermost set of brackets, we can simplify the expression step by step. By evaluating each set of brackets, we can calculate the value of the expression. Following this process, the value of the expression is found to be 127.Rate this question:
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- 37.
In his chemistry class Dmitri Ivanovich has three rows of two 6-metre by 2-metre desks. The desks are separated and also surrounded by 1-metre wide walkways, as shown on the diagram. What is the total area of the walkways, in square metres?
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72
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78
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90
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120
Correct Answer
A. 78Explanation
The total area of the walkways can be calculated by finding the perimeter of the arrangement of desks and then subtracting the area of the desks themselves. Each row of desks has a length of 6 meters and each desk has a width of 2 meters, so the perimeter of each row is (6+2+6+2) = 16 meters. Since there are three rows, the total perimeter is 3 * 16 = 48 meters. The walkways have a width of 1 meter, so the total area of the walkways is 48 * 1 = 48 square meters. However, this includes the area of the desks, so we need to subtract that. The area of each desk is 6 * 2 = 12 square meters, and since there are six desks, the total area of the desks is 6 * 12 = 72 square meters. Therefore, the total area of the walkways is 48 - 72 = 78 square meters.Rate this question:
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- 38.
What did the Wright Brothers open in 1892?
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Wright Bakery
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Wright Mechanic
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Wright Cycle Shop
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Wright Printing Shop
Correct Answer
A. Wright Cycle ShopExplanation
The Wright Brothers opened the Wright Cycle Shop in 1892. This is evident from the options provided, where the other options (Wright Bakery, Wright Mechanic, and Wright Printing Shop) do not align with historical records or the achievements of the Wright Brothers. The Wright Brothers were known for their work in aviation, particularly for inventing and building the world's first successful airplane. The establishment of the Wright Cycle Shop is significant because it served as their base for designing and building bicycles, which eventually led to their interest and expertise in aeronautics.Rate this question:
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- 39.
Where did the Wright Brothers experiment with their flying?
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Ohio
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Indiana
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North Carolina
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California
Correct Answer
A. North CarolinaExplanation
The Wright Brothers experimented with their flying in North Carolina. This location was chosen because it had consistent winds, sandy soil for soft landings, and a remote area for privacy. They conducted their experiments at Kitty Hawk, a small town on the Outer Banks of North Carolina, where they successfully achieved powered flight for the first time in history on December 17, 1903.Rate this question:
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- 40.
What innovation did the brothers use in their plane?
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New materials for the wings
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New form of the wings
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Stronger engine
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Special movements of a pilot
Correct Answer
A. New form of the wingsExplanation
The brothers used a new form of the wings in their plane. This suggests that they made changes to the shape or design of the wings, possibly to improve aerodynamics or stability. By using a different wing form, they were able to innovate and create a more efficient and effective aircraft.Rate this question:
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- 41.
How long did the first flight last?
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12 seconds
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5 minutes
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1 hour
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3 hours
Correct Answer
A. 12 secondsExplanation
The first flight lasted for 12 seconds. This indicates that the initial flight was very short in duration.Rate this question:
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- 42.
What did they receive for their flying machine?
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A Nobel prize
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A patent
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An aviation certificate
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A pilot's award
Correct Answer
A. A patentExplanation
They received a patent for their flying machine. A patent is a legal document that grants exclusive rights to an inventor for their invention, preventing others from making, using, or selling the invention without permission. This indicates that their flying machine was recognized as a unique and innovative creation, worthy of protection and acknowledgement by the patent office.Rate this question:
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- 43.
New elements are often named after countries (e.g. polonium is named after Poland, germanium is named after Germany, etc). And we also know that one country was named after an element. Which country is it?
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Lithuania was named after lithium.
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Argentina was named after silver.
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Canada was named after cadmium.
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Brazil was named after bromium.
Correct Answer
A. Argentina was named after silver.Explanation
The question asks which country was named after an element. The given options are Lithuania, Argentina, Canada, and Brazil. The correct answer is Argentina because it was named after the element silver. This is a common practice in chemistry, where elements are often named after countries or other significant entities. In this case, Argentina was named after the element silver, not Lithuania, Canada, or Brazil.Rate this question:
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- 44.
Albert studied physics and mathematics at the Swiss Federal Polytechnic School in Zurich. However, he was unable to find work as a teacher so he went to work at the Swiss Patent Office. While ..... there, he managed to complete his doctor’s degree.
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He worked
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He has worked
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He had worked
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He was working
Correct Answer
A. He was workingExplanation
The correct answer is "he was working" because the sentence is in the past tense and the action of completing his doctor's degree happened while he was working at the Swiss Patent Office.Rate this question:
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- 45.
Guess the name of the substance. Previously, it was added to bad wine to improve the taste. In ancient Rome, it was widely used for manufacturing kitchen utensils, water pipes, coins, weights. At present, it is used to protect telegraph and electric underground wires from corrosion, and in production of batteries. Its salts are used in the process of making paints.
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Gold
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Silver
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Lead
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Alluminum
Correct Answer
A. LeadExplanation
Lead is the correct answer because it was previously added to bad wine to improve the taste. In ancient Rome, it was widely used for manufacturing kitchen utensils, water pipes, coins, and weights. At present, it is used to protect telegraph and electric underground wires from corrosion and in the production of batteries. Its salts are also used in the process of making paints.Rate this question:
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- 46.
This metal found in fallen meteorites.
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Gold
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Iron
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Lead
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Copper
Correct Answer
A. IronExplanation
Iron is the correct answer because it is a metal commonly found in fallen meteorites. Meteorites are composed of various elements and minerals, and iron is one of the most abundant metals found in them. Iron is also found naturally on Earth and is a common element in the Earth's crust. Its presence in fallen meteorites further supports the idea that iron is a common metal in celestial bodies.Rate this question:
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- 47.
Which non-metal is called the “element of life and thought”?
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Calcium
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Phosphorus
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Oxygen
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Iron
Correct Answer
A. PhosphorusExplanation
Phosphorus is called the "element of life and thought" because it is an essential component of DNA, RNA, and ATP, which are all vital for life. It is also present in phospholipids, which are the main building blocks of cell membranes. Additionally, phosphorus plays a crucial role in energy transfer and storage within cells. In terms of thought, phosphorus is involved in the synthesis and release of neurotransmitters in the brain, which are responsible for transmitting signals between nerve cells. Therefore, phosphorus is closely associated with both the biological processes of life and the cognitive processes of thought.Rate this question:
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- 48.
What is the most environmentally friendly fuel?
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Helium
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Nitrogen
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Hydrogen
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Oil
Correct Answer
A. HydrogenExplanation
Hydrogen is considered the most environmentally friendly fuel because it produces no greenhouse gas emissions when burned. When hydrogen is used in fuel cells, it combines with oxygen to produce electricity, and the only byproduct is water. This makes hydrogen a clean and sustainable energy source, with the potential to significantly reduce carbon emissions and combat climate change.Rate this question:
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- 49.
....., "Why is the sky blue?" Einstein wrote a complicated equation which answered this question. In 1921 he won the Nobel Prize in Physics for his discovery of the photoelectric effect.
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Were you ever wondering
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Did you ever wonder
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Did you ever wondered
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Have you ever wondered
Correct Answer
A. Have you ever wonderedExplanation
This answer is correct because it is the only option that is grammatically correct. The question is asking if the person has ever wondered about something, so the correct phrase to use is "Have you ever wondered." The other options are not grammatically correct and do not fit the context of the question.Rate this question:
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