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Class 9

Science: Exploration

110 lessons in 13 chapters, explained in plain words.

Exploration: Entering the World of Secondary Science

  1. Models: leaving things out on purpose
  2. The shared language of science
  3. Laws, theories and predictions
  4. Estimates and connected science

Cell: The Building Block of Life

  1. Life begins with a cell
  2. Seeing the invisible
  3. The cell membrane and osmosis
  4. The cell wall
  5. Prokaryotic and eukaryotic cells
  6. The nucleus and the cell's factory line
  7. Energy, food and storage
  8. How cells divide
  9. The cell theory and the life of a cell

Tissues in Action

  1. Tissues and the division of labour
  2. How plants grow
  3. From dividing to specialised
  4. Tissues that hold a plant up
  5. Pipelines of a plant
  6. Linings and coverings
  7. Tissues that connect
  8. Muscles and nerves
  9. Bones, joints and the skeleton
  10. Cells that can become a plant

Describing Motion Around Us

  1. Position and displacement
  2. Speed and velocity
  3. Acceleration
  4. Position-time graphs
  5. Velocity-time graphs
  6. The kinematic equations
  7. Stopping distances and safety
  8. Going round in circles

Exploring Mixtures and their Separation

  1. Kinds of mixtures
  2. Concentration
  3. Solubility and its curves
  4. Crystallization
  5. Distillation
  6. Paper chromatography
  7. Layers, vapours and alloys
  8. Suspensions, spinning and clumping
  9. Colloids and the Tyndall effect
  10. Choosing a separation method

How Forces Affect Motion

  1. Forces and the net force
  2. Friction
  3. Newton's first law
  4. Newton's second law
  5. Second law in daily life
  6. Newton's third law
  7. Systems of objects

Work, Energy, and Simple Machines

  1. Work
  2. Energy and its forms
  3. Kinetic energy
  4. Potential energy
  5. Conservation of mechanical energy
  6. Power
  7. Pulleys and inclined planes
  8. Levers

Journey Inside the Atom

  1. Where the idea of atoms came from
  2. The electron and the plum pudding
  3. The gold foil experiment
  4. Bohr's shells
  5. The neutron and the mass of the atom
  6. Symbols of elements
  7. Atomic number and mass number
  8. Shells and valency
  9. Isotopes and isobars

Atomic Foundations of Matter

  1. Mass is conserved
  2. Constant proportions and Dalton's theory
  3. Sharing electrons
  4. Naming covalent compounds
  5. Transferring electrons
  6. Writing chemical formulae
  7. Ionic and covalent properties
  8. Molecular and formula unit mass

Sound Waves: Characteristics and Applications

  1. Sound comes from vibrations
  2. Sound needs a medium
  3. Compressions and rarefactions
  4. Sound carries energy
  5. Wavelength, frequency and time period
  6. The speed of sound
  7. Loudness, pitch and timbre
  8. Echoes and reverberation
  9. Ultrasound and echolocation

Reproduction: How Life Continues

  1. New plants from one parent
  2. Budding, spores and clones
  3. Meiosis makes variety
  4. Parts of a flower
  5. Pollination
  6. From fertilisation to seed
  7. How animals reproduce
  8. Human reproductive systems
  9. Fertilisation, cycle and pregnancy
  10. Growing up responsibly

Patterns in Life: Diversity and Classification

  1. Biodiversity and India
  2. Why we classify
  3. From two kingdoms to three domains
  4. Monera, Protista and Fungi
  5. Algae, mosses and lichens
  6. Ferns, pines and flowering plants
  7. Animals without a backbone
  8. Chordates and adaptations
  9. Ranks and scientific names
  10. Fossils and threats to biodiversity

Earth as a System: Energy, Matter, and Life

  1. One Earth, five spheres
  2. Energy from the Sun
  3. Why some places are hotter
  4. The atmosphere's layers
  5. Winds and ocean currents
  6. Water and carbon cycles
  7. Nitrogen and oxygen cycles
  8. Humans and the Earth system