Semester (Science, English, Maths) Year 5-6

The correct answer is 1-solid, 2-liquid, 3-gas because the question states that elements usually exist in one of three states: solid, liquid, or gas. Therefore, the first picture should represent a solid, the second picture should represent a liquid, and the third picture should represent a gas.

Objects A and C are made of glass.

The correct answer is microscope. A microscope is used to see micro-organisms better. The first idea for this equipment was suggested by Dutch optical scientists Zacharias Janssen and Hans Lippershey.

The correct answer is one year because it takes approximately 365.25 days for the Earth to complete one full orbit around the Sun. This period of time is known as a year.

The correct answer is "The Sun does not move." This sentence is true because the Sun appears to move across the sky due to the rotation of the Earth on its axis. However, in reality, the Sun remains relatively stationary in space and it is the Earth that revolves around the Sun in its orbit.

The formula of water is H2O. This is because water is composed of two hydrogen atoms bonded to one oxygen atom. The subscript 2 indicates that there are two hydrogen atoms present in the molecule.

The correct answer is "who" because it is used to refer to a person and in this case, it is referring to Edwin Hubble, the American astronomer who forever changed the way we look at the sky.

The correct answer is "with". This preposition is used to indicate the cause of someone's unhappiness or dissatisfaction. In this case, the person studied law at the university but realized that he was not happy with the profession of a lawyer. This suggests that the person did not find satisfaction or fulfillment in being a lawyer and wanted to pursue a different path, such as studying the night sky.

The correct answer is "a camera" or "camera". This is because the question states that the device was invented by Niepce Nicephore in 1826 and is used for taking pictures, which perfectly describes a camera.

Electric cars are popular now because they are good for ecology. With increasing concerns about climate change and air pollution, people are turning to electric cars as a more environmentally friendly alternative to traditional gasoline-powered vehicles. Electric cars produce zero tailpipe emissions, reducing air pollution and greenhouse gas emissions. Additionally, they also contribute to the conservation of natural resources as they can be powered by renewable energy sources such as solar or wind power.

Oxygen is the correct answer because it is the second most abundant gas in the Earth's atmosphere, making up about 21% of the air. Nitrogen is the most abundant gas, making up about 78% of the air. Hydrogen and argon are present in much smaller amounts in the atmosphere.

The mode of Einstein's data is 2 because it is the most frequent value in his recorded experiments.

The gravity of an object depends on its mass because mass is a measure of the amount of matter in an object. The more mass an object has, the stronger its gravitational pull. This is why larger objects, such as planets or stars, have stronger gravitational forces than smaller objects. Speed and acceleration do not directly affect gravity, while size is not a precise measure of an object's mass.

Isaac Newton is the correct answer because he is the scientist who discovered the three laws of motion and explained how gravity works. Newton's laws of motion describe the relationship between the motion of an object and the forces acting upon it. His law of universal gravitation explains how every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Gravity is the force of attraction between two objects with mass. In the case of the Earth and the Sun, gravity is what keeps the Earth in orbit around the Sun. The gravitational pull of the Sun keeps the Earth moving in a curved path, preventing it from flying off into space. Without gravity, the Earth would not be able to maintain its orbit around the Sun. Therefore, it is true that gravity helps the Earth to stay in orbit around the Sun.

Oxygen is essential for sustaining life as it is required for the process of respiration. Without oxygen, the body cannot produce energy, leading to organ failure and ultimately death. While water, nitrogen, and salt are also important for the body, they do not have the same immediate life-sustaining function as oxygen.

Helium is used to fill airships because it is an inert gas, meaning it does not react with other substances. This makes it safe for use in airships as it does not pose a risk of combustion or explosion. Additionally, helium is lighter than air, which allows the airship to float and be controlled easily.

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Newton used an apple while experimenting with gravity. This is a well-known story where Newton observed an apple falling from a tree, which led him to develop his theory of gravity.

Magnets attract objects that are made of iron, nickel, or cobalt. Option B and C are correct because they represent objects that are attracted to magnets. Option A and D are not attracted to magnets because they do not fall into the category of materials that magnets attract.

Hot water is the correct answer because higher temperatures increase the kinetic energy of the particles, leading to more frequent and energetic collisions between the solute particles and the solvent molecules. This results in faster dissolution of the substances in hot water compared to cold water, where the lower temperature slows down the dissolution process.

The speaker mentioned that the Internet can help people to communicate and study, that it allows people to do things quicker, and that putting personal information on the Internet can be dangerous. However, the idea that was not mentioned by the speaker is that the Internet can be bad for people's health.

If 5/7 of the seats were occupied by the students, then the remaining 2/7 of the seats were empty. We can set up a proportion to find the total number of seats in the auditorium. Let x represent the total number of seats. We can write the equation 5/7 = 540/x. Cross multiplying, we get 5x = 3780. Dividing both sides by 5, we find that x = 756. Therefore, there were 756 seats in the auditorium.

The correct answer is "a science of substances and their properties." This answer accurately describes the field of chemistry, which focuses on the study of different substances, their composition, structure, properties, and the changes they undergo during chemical reactions. Chemistry is not limited to living things or everything beyond Earth, but rather encompasses the study of all types of matter and its interactions.

Electricity is the flow of electrons. Electrons are negatively charged particles that move through conductive materials, creating an electric current. Neutrons and protons are particles found in the nucleus of an atom and do not participate in the flow of electricity. Therefore, the correct answer is electrons.

The correct answer is "an iron, iron" because an iron is a household appliance that is used to remove wrinkles and make clothes flat and smooth. It was invented by Henry W. Seeley in 1882. The word "iron" is used twice in the answer, first as an article (an) and then as the actual object being referred to.

Newton was born in England. This is evident from the given options where Austria and Germany are incorrect choices. England is the correct answer as it is the birthplace of Sir Isaac Newton, a renowned physicist and mathematician.

Newton's law of universal gravitation states that every object in the universe attracts every other object with a force called gravity. This force is responsible for holding the planets in our solar system in place. Newton's extensive research and mathematical calculations led him to prove the existence and significance of gravity in understanding the motion and stability of celestial bodies.

The word "in" is the correct answer because it is used to indicate location or position within a place or area. In this context, "in" is used to show that his name is given to a telescope called the Hubble Space telescope, which is located or positioned within outer space.

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Dmitri Mendeleev placed all the elements known at that time in his Periodic Table.

Edwin not only found more galaxies but also developed a classification system for them. The pronoun "them" refers back to the galaxies that Edwin discovered.

Blaise Pascal invented the calculator in 1642, which is now an electronic device used for mathematical processes like addition and subtraction. The correct answer is "a calculator" or simply "calculator."

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The correct answer is "a computer" or "Computer". This is because the statement mentions that it was invented by John Atanasoff in 1939 and describes it as an electronic machine used for storing, organizing, and processing information. This matches the definition of a computer, which is a device that performs various tasks by processing information electronically.

Sir Isaac Newton was born in 1643.

Salt dissolves in water because it is an ionic compound made up of positively charged sodium ions and negatively charged chloride ions. When salt is added to water, the water molecules surround the ions and pull them away from each other, breaking the ionic bonds and allowing the salt to dissolve. This process is known as hydration. Flour, sand, and stones are not soluble in water and do not dissolve.

During his time in college, Newton developed the mathematical field of calculus. This revolutionary branch of mathematics provided a framework for understanding and solving problems involving rates of change and accumulation. Newton's work in calculus laid the foundation for many scientific and engineering advancements, making it a significant contribution to the field of mathematics.

The compounds that can be found in nature are A and B.

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The perimeter of a rectangle is calculated by adding up the lengths of all its sides. In this case, the length of the laboratory is given as 8 m and the width is given as 3 m. To find the perimeter, we add twice the length to twice the width. So, 2(8 m) + 2(3 m) = 16 m + 6 m = 22 m. Therefore, the perimeter of the laboratory is 22 m.

Mercury is the metal that is in a liquid state at room temperature. It is used in thermometers due to its unique properties, such as high thermal conductivity and low freezing point. These characteristics allow mercury to expand and contract evenly with temperature changes, making it an ideal substance for measuring temperature accurately.

The given correct answer is "a radio, radio, RADIO." This answer is correct because the statement mentions that the invention was made by Guglielmo Marconi in the 1890s and it is a piece of electronic equipment used for listening to music, news, and other broadcasts. The word "radio" is repeated three times in the answer, emphasizing the correct response.

Aluminium is used in aircraft construction because it is a light metal with a low density, making it ideal for reducing the weight of the aircraft. It also has good strength-to-weight ratio, corrosion resistance, and is easy to work with. These properties make aluminium a popular choice for constructing various parts of an aircraft, such as the fuselage, wings, and other structural components.

Nikolas Copernicus is the correct answer because he was the Polish astronomer who challenged the belief that the Sun orbited the Earth. In the 16th century, Copernicus proposed the heliocentric model, which stated that the Earth and other planets orbit the Sun. This model revolutionized our understanding of the Solar system and laid the foundation for modern astronomy. Ptolemy, Galileo Galilei, and Archimedes were important figures in the history of science, but they did not make the groundbreaking discovery about the Earth's orbit around the Sun like Copernicus did.

In order to arrange the cards in 6 rows, each row should have the same number of cards. Since 23 is not divisible by 6, Albert needs to add an additional card to the existing 23 cards to make them divisible by 6. This way, he will have 24 cards and can arrange them evenly in 6 rows of 4 cards each. Therefore, the smallest number of additional cards he should use is 1.

The question asks how many degrees colder it was in New York than in Bern. The temperature in Bern is not given, so we cannot determine the exact temperature difference. However, the answer choices provide options for the temperature difference. Since the correct answer is 11°С, it means that the temperature in New York was 11 degrees colder than in Bern.

Benjamin Franklin is credited with discovering electricity through his famous kite experiment in 1752. He flew a kite with a metal key attached to it during a thunderstorm and observed that the key attracted sparks from a Leyden jar, proving that lightning is a form of electricity. This experiment laid the foundation for understanding electricity and its practical applications. Franklin's discoveries and experiments greatly contributed to the development of the field of electricity and led to numerous advancements in technology.

An irreversible change refers to a process that cannot be reversed or undone. When a candle burns, it undergoes a chemical reaction called combustion, where the wax reacts with oxygen to produce heat, light, carbon dioxide, and water vapor. Once the candle has burned, it cannot be restored to its original form. Therefore, burning a candle is an example of an irreversible change.

Hubble's most famous achievement was proving the existence of other galaxies in the sky. This discovery revolutionized our understanding of the universe and paved the way for further exploration and research in the field of astronomy.