Grade 9 – Science – LS
Set 3 – Grade 9 (Science)
Dear ! This is Set 3 – Grade 9 (Science) Quiz and it contains 25 questions.
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1. What is the term for the ability of an organism to regrow or replace lost or damaged body parts?
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2. What is the term for the study of the interactions between organisms and their environment?
Ecology is the term for the study of the interactions between organisms and their environment. It involves studying how organisms interact with each other and with their physical surroundings, including aspects such as the flow of energy and the cycling of nutrients.
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3. Which of the following is NOT a type of electromagnetic radiation?
Sound waves are not a type of electromagnetic radiation. Unlike electromagnetic waves, sound waves require a medium (such as air, water, or solids) to propagate. Electromagnetic radiation, on the other hand, can travel through vacuum and includes various types such as X-rays, microwaves, and radio waves.
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4. Which of the following is a vector quantity?
Velocity is a vector quantity as it has both magnitude and direction. Speed, on the other hand, is a scalar quantity as it only has magnitude and no direction.
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5. Which of the following is an example of a non-renewable energy source?
Coal is an example of a non-renewable energy source. Non-renewable energy sources are finite and cannot be replenished on a human timescale. In contrast, wind power, geothermal energy, and solar power are examples of renewable energy sources that can be naturally replenished.
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6. What is the study of the Earth’s physical structure, history, and the processes that shape it called?
Geology is the study of the Earth’s physical structure, history, and the processes that shape it. It involves investigating the rocks, minerals, fossils, landforms, and geological phenomena to understand the Earth’s past and present.
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7. What is the term for the force that opposes the motion of an object through a fluid?
Friction is the term for the force that opposes the motion of an object through a fluid. It occurs when there is relative motion between two objects in contact, and it acts to reduce or impede their motion. Friction can be influenced by factors such as the texture and surface area of the objects.
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8. Which of the following is NOT a fundamental particle of an atom?
Isotope is NOT a fundamental particle of an atom. Instead, isotopes refer to different forms of an element that have the same number of protons but different numbers of neutrons. Protons, neutrons, and electrons are the three fundamental particles that make up an atom.
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9. What is the process by which a substance changes from a gas directly to a solid without passing through the liquid state?
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10. What is the phenomenon where light is both a particle and a wave called?
Wave-particle duality is the phenomenon in quantum mechanics where light and other particles exhibit both wave-like and particle-like properties. This concept was established through experiments like the double-slit experiment, which showed the interference patterns of light waves and the discrete nature of particle detection.
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11. What is the process by which a cell engulfs and takes in solid particles from its surroundings called?
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12. What is the process by which liquid water changes into water vapor at temperatures below its boiling point?
Evaporation is the process by which liquid water changes into water vapor at temperatures below its boiling point. It occurs when the molecules of water gain enough energy to overcome the intermolecular forces holding them together, leading to their escape into the surrounding air.
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13. Which of the following is a greenhouse gas that is primarily released through human activities such as burning fossil fuels?
Methane is a greenhouse gas that is primarily released through human activities such as burning fossil fuels, agricultural practices, and waste management. It is a potent greenhouse gas, meaning it contributes significantly to the trapping of heat in the Earth’s atmosphere, leading to global warming and climate change.
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14. What is the process by which liquid water changes into water vapor at its boiling point throughout the liquid?
Vaporization is the process by which liquid water changes into water vapor at its boiling point throughout the liquid. This occurs when the thermal energy of the water molecules is sufficient to overcome the intermolecular forces and escape into the gaseous phase.
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15. What is the phenomenon where an object appears to be a different color when viewed under different light sources?
Dispersion is the phenomenon where an object appears to be a different color when viewed under different light sources. This occurs because different wavelengths of light are refracted by different amounts, resulting in the separation of colors.
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16. What is the unit of measure for electric resistance?
Ohm is the unit of measure for electric resistance. It is named after the German physicist Georg Simon Ohm, who formulated Ohm’s Law, which relates the current flowing through a conductor to the voltage and resistance.
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17. What is the term for the process by which plants convert light energy into chemical energy stored in glucose?
Photosynthesis is the process by which plants convert light energy into chemical energy stored in glucose. In this process, plants use sunlight, water, and carbon dioxide to produce glucose (a form of sugar) and oxygen. This process occurs in the chloroplasts of plant cells.
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18. What is the term for the transfer of heat through direct contact between particles of matter?
Conduction is the term for the transfer of heat through direct contact between particles of matter. It occurs when heat energy is transferred from one particle to another through collisions or direct physical contact.
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19. What is the SI unit for measuring pressure?
Pascal is the SI unit for measuring pressure. It is named after the French mathematician and physicist Blaise Pascal. One Pascal (Pa) is defined as one Newton of force per square meter of area.
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20. What is the process by which an unstable atomic nucleus releases energy in the form of radiation?
Radioactivity is the process by which an unstable atomic nucleus releases energy in the form of radiation. This can occur through various types of radioactive decay, such as alpha decay, beta decay, and gamma decay.
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21. Which of the following is the largest planet in our solar system?
Jupiter is the largest planet in our solar system. It is a gas giant and has a diameter more than 11 times that of Earth. Jupiter is known for its massive size, colorful cloud bands, and iconic Great Red Spot.
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22. What is the process by which an organism develops from a single-celled zygote into a multi-cellular organism?
Embryogenesis is the process by which an organism develops from a single-celled zygote into a multi-cellular organism. It involves cell division, differentiation, and morphogenesis to form the various tissues, organs, and body systems of the organism.
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23. Which of the following is responsible for the production of antibodies in the human body?
White blood cells are responsible for the production of antibodies in the human body. Antibodies are proteins produced by white blood cells (specifically B cells) in response to the presence of foreign substances, such as bacteria or viruses, in the body. Antibodies help in the immune response by identifying and neutralizing these foreign substances.
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24. Which of the following is the largest unit of geological time?
Eon is the largest unit of geological time. It represents a vast span of time, usually associated with major geological events or changes in the Earth’s history. Eons are further divided into eras, periods, and epochs.
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25. Which of the following is NOT a greenhouse gas?
Oxygen is not considered a greenhouse gas. Greenhouse gases are those that can trap heat in the Earth’s atmosphere, contributing to the greenhouse effect and climate change. Carbon dioxide, methane, and water vapor are examples of greenhouse gases.
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