Preparing for your class 10 science exam can feel a little overwhelming. But with the right practice, you can feel confident and ready. One of the best ways to get ready is by solving sample papers. Sample papers help you understand the type of questions that may appear on the exam. They give you a chance to practice and test your knowledge before the real exam. In this article, you will find many science sample questions and answers for class 10. You can use these to guide your studies and improve your performance.
Questions and Answers:
Question: What is the formula for photosynthesis?
Answer: The formula for photosynthesis is:
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂.
This shows how plants make their food using carbon dioxide, water, and light energy.
Question: What is the difference between a conductor and an insulator?
Answer: A conductor allows the flow of electric current, while an insulator does not. Materials like copper and aluminum are conductors, while rubber and plastic are insulators.
Question: Define kinetic energy.
Answer: Kinetic energy is the energy possessed by an object due to its motion. It depends on the mass and speed of the object.
Question: What is the SI unit of force?
Answer: The SI unit of force is the Newton (N). It is the force required to move a 1-kilogram mass by 1 meter per second squared.
Question: What is the difference between speed and velocity?
Answer: Speed is the distance traveled per unit of time, while velocity is the speed in a specific direction. Velocity is a vector quantity.
Question: What is the chemical formula of methane?
Answer: The chemical formula of methane is CH₄. It is a simple hydrocarbon made of one carbon atom and four hydrogen atoms.
Question: Explain the process of digestion in the human body.
Answer: Digestion in the human body starts in the mouth where food is chewed and mixed with saliva. The food then travels to the stomach, where it is broken down further by acids and enzymes. Nutrients are absorbed in the small intestine, and waste is expelled through the large intestine.
Question: What is the function of the heart in humans?
Answer: The heart pumps blood throughout the body, supplying oxygen and nutrients to cells and removing waste products. It plays a vital role in the circulatory system.
Question: What is the role of chlorophyll in photosynthesis?
Answer: Chlorophyll is the green pigment in plants that absorbs light energy, which is then used in the process of photosynthesis to produce food.
Question: What is an ecosystem?
Answer: An ecosystem is a community of living organisms interacting with each other and their physical environment. It includes plants, animals, water, soil, and air.
Question: What is the law of conservation of mass?
Answer: The law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction. It remains constant before and after the reaction.
Question: Define work done in physics.
Answer: Work is done when a force causes an object to move in the direction of the force. It is calculated as force multiplied by distance.
Question: What is the main function of the roots in plants?
Answer: The roots anchor the plant in the soil and absorb water and minerals necessary for the plant's growth.
Question: How does the human eye work?
Answer: The human eye works by focusing light on the retina, where the image is converted into electrical signals that are sent to the brain, allowing us to see.
Question: What is meant by electric current?
Answer: Electric current is the flow of electric charge through a conductor. It is measured in amperes (A).
Question: What are acids and bases?
Answer: Acids are substances that release hydrogen ions in water, while bases release hydroxide ions. Acids have a sour taste, and bases feel slippery.
Question: Define refraction of light.
Answer: Refraction is the bending of light as it passes from one medium to another with a different density, like from air to water.
Question: What is the function of the respiratory system?
Answer: The respiratory system helps in breathing, taking in oxygen, and expelling carbon dioxide from the body.
Question: What is the difference between renewable and non-renewable resources?
Answer: Renewable resources, like solar energy and wind, can be replenished naturally. Non-renewable resources, like coal and oil, are finite and cannot be replaced once used.
Question: What is the formula for acceleration?
Answer: The formula for acceleration is:
Acceleration (a) = (Final velocity - Initial velocity) / Time.
Question: Explain the concept of density.
Answer: Density is the mass of an object per unit volume. It is calculated as mass divided by volume.
Question: What is an electric circuit?
Answer: An electric circuit is a path through which electric current flows. It includes components like a power source, wires, and devices like bulbs.
Question: What is the role of enzymes in digestion?
Answer: Enzymes are proteins that speed up chemical reactions in the digestive system. They break down large food molecules into smaller, absorbable molecules.
Question: Define nuclear fusion.
Answer: Nuclear fusion is the process where two light atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy. It is the process that powers the sun.
Question: What are the states of matter?
Answer: The states of matter are solid, liquid, and gas. Matter can change from one state to another by adding or removing heat.
Question: What is the principle of conservation of energy?
Answer: The principle of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.
Question: What are the types of muscles in the human body?
Answer: The human body has three types of muscles: skeletal, smooth, and cardiac. Skeletal muscles help with movement, smooth muscles control internal organs, and cardiac muscles make the heart beat.
Question: What is the function of the excretory system?
Answer: The excretory system removes waste products from the body. It includes organs like the kidneys, bladder, and urethra.
Question: What is magnetic force?
Answer: Magnetic force is the force exerted by magnets on other materials. It can attract or repel objects made of magnetic materials.
Question: How is light energy produced?
Answer: Light energy is produced when atoms absorb energy and their electrons move to a higher energy level, emitting light when they return to their original state.
Question: What is a chemical reaction?
Answer: A chemical reaction occurs when substances interact and change into new substances with different properties. This can involve the breaking and forming of bonds.
Question: What is the function of the nervous system?
Answer: The nervous system controls and coordinates body activities. It sends electrical signals between the brain, spinal cord, and other parts of the body.
Question: What are the differences between plant and animal cells?
Answer: Plant cells have a cell wall, chloroplasts, and a large central vacuole, while animal cells lack these features. Both have a nucleus and other organelles.
Question: What is the role of the digestive system in humans?
Answer: The digestive system breaks down food into smaller components, absorbs nutrients, and eliminates waste from the body.
Question: What is the importance of water for living organisms?
Answer: Water is essential for life as it helps with digestion, temperature regulation, and transporting nutrients and oxygen in the body.
Question: What is the law of reflection?
Answer: The law of reflection states that the angle of incidence is equal to the angle of reflection when light reflects off a surface.
Question: What is the difference between an element and a compound?
Answer: An element is a pure substance made of one type of atom, while a compound is a substance made of two or more different elements chemically combined.
Question: What is the function of the skeletal system in humans?
Answer: The skeletal system supports the body, protects vital organs, and allows movement by providing a framework for muscles to attach to.
Question: What is friction?
Answer: Friction is the resistance that one surface or object encounters when moving over another. It can slow down or stop motion.
Question: How do vaccines work?
Answer: Vaccines stimulate the immune system to recognize and fight specific pathogens by introducing a harmless part of the pathogen, helping prevent future infections.
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