Class 9 Science questions with answers

143 NCERT Class 9 Science questions with answers, chapter by chapter, from Exploration: Entering the World of Secondary Science to Earth as a System: Energy, Matter, and Life.

How to teach Class 9 Science · Class 9 Science common misconceptions

• Chapter 1: Exploration: Entering the World of Secondary Science

  15 questions · Evidence, scientific ideas, and testable predictions · Scientific models and relevant details · Precise scientific language, symbols, units, and mathematics · Estimation and checking reasonableness · Science as connected, human, and critical inquiry

• Chapter 2: Cell: The Building Block of Life

  15 questions · Cells, microscopy, scale, and biological organisation · Cell theory, cell lifespan, and growth control · Cell membrane, diffusion, and osmosis · Cell wall, structural support, and plasmolysis · Nucleus and the cellular manufacturing system · Prokaryotic, eukaryotic, plant, and animal cells · Energy, food synthesis, storage, and support organelles · Cell growth, mitosis, meiosis, and division errors

• Chapter 3: Tissues in Action

  15 questions · Tissue organisation, division of labour, and adaptation · Meristems, plant growth, and differentiation · Protective and simple permanent plant tissues · Skeletal support, protection, and flexibility · Xylem, phloem, and plant tissue systems · Plant-cell totipotency and tissue culture · Epithelial and connective animal tissues · Muscle types and nervous coordination · Musculoskeletal coordination and joint types

• Chapter 4: Describing Motion Around Us

  15 questions · Position, reference point, rest, and motion · Average speed, average velocity, and uniform motion · Distance, displacement, and direction · Acceleration, velocity change, and sign · Position-time graphs and slope · Velocity-time graphs, slope, and area · Kinematic equations for constant acceleration · Motion in a plane and uniform circular motion

• Chapter 5: Exploring Mixtures and their Separation

  15 questions · Homogeneous and heterogeneous mixtures · Solutions, solute, solvent, and concentration · Percentage concentration by mass and volume · Solubility, saturation, and crystallization · Suspensions, centrifugation, and coagulation · Colloids and the Tyndall effect · Separating immiscible liquids and sublimable solids · Distillation and paper chromatography

• Chapter 6: How Forces Affect Motion

  12 questions · Force as a measured vector · Balanced forces, unbalanced forces, and net force · Friction and motion · Newton's first law and inertia · Newton's second law and momentum · Newton's third law and systems of objects

• Chapter 7: Work, Energy, and Simple Machines

  8 questions · Work by a constant force · Kinetic energy and the work-energy theorem · Potential energy and conservation of mechanical energy · Power and simple machines

• Chapter 8: Journey Inside the Atom

  8 questions · Atomic models and experimental evidence · Atomic number, mass number, electron distribution, and valency · Protons, neutrons, and atomic mass · Isotopes and isobars

• Chapter 9: Atomic Foundations of Matter

  8 questions · Chemical change, mass laws, and Dalton's theory · Properties and masses of ionic and covalent compounds · Covalent and ionic bonding · Writing chemical formulae

• Chapter 10: Sound Waves: Characteristics and Applications

  8 questions · Production and propagation of sound · Sound waves and their characteristics · Speed of sound and human perception · Reflection, echoes, reverberation, and ultrasound

• Chapter 11: Reproduction: How Life Continues

  8 questions · Asexual reproduction and vegetative propagation · Sexual reproduction in flowering plants · Animal and human reproduction and health · Sexual reproduction, meiosis, and variation

• Chapter 12: Patterns in Life: Diversity and Classification

  8 questions · Biodiversity, evolution, and the need for classification · Five-kingdom classification · Classification hierarchy and binomial nomenclature · Fossils, adaptation, and biodiversity under threat

• Chapter 13: Earth as a System: Energy, Matter, and Life

  8 questions · Uneven solar heating of Earth · Winds and ocean currents · Water, carbon, nitrogen, and oxygen cycles · Human impacts and Earth-system feedbacks