10th Science Quarterly Question Paper 2018

10th Science Quarterly Question Paper 2018 serves as a useful resource for students preparing for exams. This guide includes essential questions and their answers, offering clarity and understanding. Covering all subjects, it helps students learn and practice various concepts effectively while strengthening their knowledge for better performance in exams.

10th Science Quarterly Question Paper 2018 – Physics

Question What is the unit of force in the SI system?

Answer The unit of force in the SI system is the Newton (N).

Question State Newton’s Second Law of Motion.

Answer Newton’s Second Law states that force is equal to mass times acceleration.

Question Define work and write its formula.

Answer Work is the product of force and displacement in the direction of force. Formula: W = F × d × cos(θ).

Question Explain the law of conservation of energy.

Answer Energy cannot be created or destroyed but can only change forms.

Question What is the speed of light in a vacuum?

Answer The speed of light in a vacuum is approximately 3 × 10⁸ m/s.

Question What is the difference between mass and weight?

Answer Mass is the measure of matter in an object, while weight is the force exerted by gravity on an object.

Question Define momentum and write its formula.

Answer Momentum is the product of mass and velocity. Formula: p = mv.

Question What is the principle of flotation?

Answer An object floats if its weight equals the weight of the fluid displaced by it.

Question Explain Ohm’s Law.

Answer Ohm’s Law states that the current through a conductor is directly proportional to the voltage across it, provided the temperature remains constant.

Question What is meant by refraction of light?

Answer Refraction is the bending of light as it passes from one medium to another.

Question Define power and write its SI unit.

Answer Power is the rate of doing work. Its SI unit is Watt (W).

Question What are the components of a simple circuit?

Answer A simple circuit includes a power source, a conductor, a load, and a switch.

Question Explain the term “electric potential.”

Answer Electric potential is the work done to move a unit charge from infinity to a point.

Question What are renewable sources of energy?

Answer Renewable sources of energy include solar, wind, hydro, and geothermal energy.

Question What is an electromagnet?

Answer An electromagnet is a temporary magnet created by passing current through a coil.

Question Define frequency and its unit.

Answer Frequency is the number of oscillations per second, measured in Hertz (Hz).

Question What is the universal law of gravitation?

Answer The force between two masses is directly proportional to their product and inversely proportional to the square of their distance.

Question What is a convex lens?

Answer A convex lens is a lens that is thicker in the middle and converges light rays.

Question Explain the term “resistance.”

Answer Resistance is the opposition to the flow of electric current in a circuit.

10th Science Quarterly Question Paper 2018 – Chemistry

Question What is the chemical formula for water?

Answer The chemical formula for water is H₂O.

Question What is the atomic number of carbon?

Answer The atomic number of carbon is 6.

Question Define valency.

Answer Valency is the combining capacity of an atom with other atoms.

Question What is a covalent bond?

Answer A covalent bond is formed by the sharing of electron pairs between atoms.

Question Write the chemical equation for photosynthesis.

Answer 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.

Question What is pH?

Answer pH is the measure of acidity or alkalinity of a solution.

Question Name the acid present in lemon.

Answer The acid present in lemon is citric acid.

Question Define an isotope.

Answer Isotopes are atoms of the same element with different mass numbers.

Question What is the periodic table?

Answer The periodic table is a tabular arrangement of elements based on their properties.

Question Write the formula for sodium chloride.

Answer The formula for sodium chloride is NaCl.

Question What is electrolysis?

Answer Electrolysis is the chemical decomposition of a substance by passing an electric current.

Question What is the principle of chromatography?

Answer Chromatography separates mixtures based on the difference in their movement through a medium.

Question Define an alkali.

Answer An alkali is a base that dissolves in water.

Question What is an exothermic reaction?

Answer An exothermic reaction releases heat.

Question What is the common name for H₂SO₄?

Answer The common name for H₂SO₄ is sulfuric acid.

Question What is a catalyst?

Answer A catalyst speeds up a chemical reaction without being consumed.

Question Name the noble gases.

Answer Noble gases include helium, neon, argon, krypton, xenon, and radon.

Question What is rusting?

Answer Rusting is the corrosion of iron in the presence of air and moisture.

Question What are hydrocarbons?

Answer Hydrocarbons are organic compounds composed of hydrogen and carbon.

10th Science Quarterly Question Paper 2018 – Biology

Question What is the function of chlorophyll?

Answer Chlorophyll helps in photosynthesis by capturing light energy.

Question Define osmosis.

Answer Osmosis is the movement of water molecules through a semi-permeable membrane from a low solute concentration to a high solute concentration.

Question What is the basic unit of life?

Answer The cell is the basic unit of life.

Question Define an ecosystem.

Answer An ecosystem is a community of living and non-living components interacting with each other.

Question What is the role of hemoglobin?

Answer Hemoglobin transports oxygen in the blood.

Question What is the genetic material in humans?

Answer The genetic material in humans is DNA.

Question Name the process by which plants make food.

Answer The process by which plants make food is photosynthesis.

Question What is the full form of RNA?

Answer The full form of RNA is ribonucleic acid.

Question What is the primary function of the heart?

Answer The heart pumps blood throughout the body.

Question Define biodiversity.

Answer Biodiversity is the variety of life forms on Earth.

Question What is a food chain?

Answer A food chain is the sequence of organisms through which energy flows in an ecosystem.

Question What is the role of stomata in plants?

Answer Stomata control the exchange of gases and water vapor in plants.

Question Define fertilization in biology.

Answer Fertilization is the fusion of male and female gametes.

Question What is the role of mitochondria?

Answer Mitochondria are the powerhouse of the cell, producing energy.

Question What is a vaccine?

Answer A vaccine is a biological preparation that provides immunity against diseases.

Question What is the difference between arteries and veins?

Answer Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood to the heart.

Question Define heredity.

Answer Heredity is the transmission of genetic traits from parents to offspring.

Question What is the function of the nervous system?

Answer The nervous system controls and coordinates body activities.

Question What is a habitat?

Answer A habitat is the natural environment of an organism.

10th Science Quarterly Question Paper 2018 provides students with a comprehensive understanding of important concepts through questions and answers. This guide covers all subjects, helping learners practice effectively for exams. It encourages a deeper understanding of science topics, preparing students to excel in their studies with confidence.