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Class 8

Science: Curiosity

113 lessons in 13 chapters, explained in plain words.

Exploring the Investigative World of Science

  1. The investigative world of science
  2. The root and the kite
  3. The journey through this book
  4. Investigating a puri

The Invisible Living World: Beyond Our Naked Eye

  1. Lenses and the microscope
  2. Looking at real cells
  3. What each part of a cell does
  4. Cells come in many shapes
  5. Levels of organisation
  6. What are microorganisms?
  7. Microbes clean the environment
  8. Microbes in the kitchen and the field
  9. Microalgae, and why the cell is the basic unit

Health: The Ultimate Treasure

  1. What health really means
  2. Staying healthy
  3. Signs and symptoms
  4. Two kinds of disease
  5. How communicable diseases spread
  6. Non-communicable diseases
  7. Immunity and vaccines
  8. Antibiotics
  9. Antibiotic resistance

Electricity: Magnetic and Heating Effects

  1. Current has a magnetic effect
  2. Making an electromagnet
  3. Poles and strength
  4. Lifting electromagnets and the Earth
  5. Current makes a wire hot
  6. Heating appliances and safety
  7. The Voltaic cell
  8. Dry cells and rechargeable batteries

Exploring Forces

  1. What is a force?
  2. What a force can do
  3. A force needs two objects
  4. Contact forces and muscular force
  5. Friction
  6. Magnetic and electrostatic force
  7. Gravitational force
  8. Weight and mass

Pressure, Winds, Storms, and Cyclones

  1. The same weight, spread differently
  2. Measuring pressure, and why a sharp edge does the work
  3. A liquid presses, and the height of the column is what counts
  4. Liquids press in every direction
  5. Air presses on everything, and it presses hard
  6. Wind is air moving from high pressure to low
  7. Fast winds lower the pressure, and roofs fly
  8. Storms, thunderstorms and lightning
  9. Cyclones

Particulate Nature of Matter

  1. Breaking chalk down as far as it will go
  2. Where the sugar goes
  3. What holds the particles together
  4. Solids: packed tight, and how they melt
  5. Liquids: a fixed volume, but no fixed shape
  6. Gases fill all the space there is
  7. How much space is between the particles
  8. The particles are always moving
  9. Heat energy decides the state

Nature of Matter: Elements, Compounds, and Mixtures

  1. What a mixture is
  2. Alloys, and the ancient name Mishraloha
  3. Air is a mixture
  4. Types of mixtures, and what 'pure' really means
  5. Splitting water with electricity
  6. Elements
  7. Compounds
  8. Iron and sulfur: a mixture beside a compound
  9. All around us, and in the rocks

The Amazing World of Solutes, Solvents, and Solutions

  1. Solute, solvent and solution
  2. How much will dissolve: saturated and unsaturated
  3. Heat it, and more will dissolve
  4. Gases dissolve too
  5. Float or sink, and what density means
  6. Measuring the mass
  7. Measuring the volume
  8. An odd-shaped stone, and its density
  9. Heat, pressure, and why ice floats

Light: Mirrors and Lenses

  1. Meena's curved mirrors
  2. What each curved mirror shows
  3. Where these mirrors are used
  4. The first law of reflection
  5. The second law of reflection
  6. Converging and diverging mirrors
  7. A drop of water as a lens
  8. Looking through the two lenses
  9. Converging and diverging lenses

Keeping Time with the Skies

  1. Meera's daytime Moon
  2. The phases of the Moon
  3. Where to look for the Moon
  4. Why the shape changes
  5. The day, the month and the year
  6. Lunar calendars and solar calendars
  7. Luni-solar calendars
  8. Uttarayan, Dakshinayan and the Indian National Calendar
  9. Festivals in the sky
  10. Satellites we put in the sky

How Nature Works in Harmony

  1. Elephants in the fields, and what a habitat holds
  2. Populations and communities
  3. Does every organism matter?
  4. What an ecosystem is
  5. Producers, consumers, and who eats what
  6. Food chains, trophic levels and food webs
  7. Nothing is wasted
  8. One change leads to another
  9. Competing, helping and harming
  10. What ecosystems give us, and what we owe them

Our Home: Earth, a Unique Life Sustaining Planet

  1. Life lives on a skin as thin as an apple's
  2. The planets, and why Venus is the hottest
  3. The habitable zone
  4. The right size, and the shield of ozone
  5. The Earth's magnetic shield
  6. Air, water and sunlight
  7. The four spheres, and the balance between them
  8. Why life does not run out
  9. How plants and animals reproduce
  10. The triple planetary crisis