Curiosity: Class 8 Science (NCERT)
NCERT's Class 8 Science textbook, Curiosity: explore science through questions, observations and simple investigations. It connects living things, materials, forces, health, the Earth and the environment with everyday life. Learn to think like a scientist, do activities safely, work with others, and keep discovering the world around you.
Exploring The Investigative World Of Science
Chapter 1
Chapter 1 · Start here
Exploring The Investigative World Of Science
How scientists work: careful observation and creative ideas, fair experiments, and a first look at what you'll explore this year.
Sprint 1
Doing A Fair Experiment
Plan a fair test by changing one thing at a time and measuring what happens.
Sprint 2
Forces, Matter And Materials
A first look at forces, pressure, particles, and elements, compounds and mixtures.
Sprint 3
Earth, Life, And The Universe
A first look at light, the Moon, microbes, ecosystems and climate change.
Sprint 4
Review: What You'll Explore This Year
Check the big ideas from this chapter, and design an experiment of your own.
The Invisible Living World: Beyond Our Naked Eye
Chapter 2
Chapter 2 · Start here
The Invisible Living World: Beyond Our Naked Eye
Cells, the tiny units all life is built from, and the microbes that recycle nutrients, make oxygen and turn milk into curd.
Sprint 5
The Basic Unit Of Life
Understand the history of microscopy and the core organelles that make up a cell.
Sprint 6
Form, Function & Organization
Connect the shape of individual cells to their functions, and understand how cells build up to form an entire organism.
Sprint 7
Meet The Microbes
Classify the major groups of microorganisms and understand their basic characteristics.
Sprint 8
Microbes In The Environment
Appreciate the vital role microbes play in recycling nutrients, providing alternative fuels, and generating oxygen.
Sprint 9
Microbes In The Kitchen
Understand fermentation processes used in everyday food production like bread and curd.
Sprint 10
Comparing Cell Architectures
Synthesize knowledge by classifying organisms based on cell structure (unicellular vs multicellular, prokaryote vs eukaryote features).
Sprint 11
Chapter Review
Consolidate learning, practice retrieval of key terms, and apply concepts to experimental scenarios.
Health: The Ultimate Treasure
Chapter 3
Chapter 3 · Start here
Health: The Ultimate Treasure
What being healthy really means, how diseases spread, and how vaccines and medicines protect us.
Sprint 12
Redefining Health & Wellbeing
Understand health as a multidimensional state (WHO definition) and distinguish between symptoms and signs of illness.
Sprint 13
Diseases: Types And Transmission
Classify diseases into communicable and non-communicable types, and understand the various vectors and pathways through which pathogens spread.
Sprint 14
The Disease Encyclopedia
Compare, contrast, and memorize the causal agents, symptoms, and preventive measures for common communicable and non-communicable diseases.
Sprint 15
Immunity, Vaccines & Prevention
Understand how the immune system works, the mechanism of vaccines, and the historical context of smallpox eradication.
Sprint 16
Treatment & Antibiotic Resistance
Understand how antibiotics target bacteria (not viruses), the history of their discovery, and the dangerous mechanisms of antibiotic resistance.
Sprint 17
Chapter Review
Consolidate learning through progressive retrieval, vocabulary review, and higher-order application questions.
Electricity: Magnetic And Heating Effects
Chapter 4Chapter 4 · Start here
Electricity: Magnetic And Heating Effects
Electric current can make magnets and heat, and batteries make current from chemical reactions.
Sprint 18
Magnetic Effects & Electromagnets
Understand that electric current produces a magnetic field, and learn how to construct and strengthen an electromagnet.
Sprint 19
The Heating Effect Of Current
Understand that resistance to current flow generates heat, which is utilized in appliances but requires safety considerations.
Sprint 20
Inside Batteries And Cells
Understand how chemical reactions inside cells generate electric current, distinguishing between single-use and rechargeable types.
Sprint 21
Chapter Review: Electricity's Effects
Synthesize and evaluate understanding of magnetic effects, heating effects, and chemical cells through progressive assessment.
Exploring Forces
Chapter 5Chapter 5 · Start here
Exploring Forces
Pushes and pulls you can and can't see: muscles, friction, magnetism, gravity, weight, and why things float.
Sprint 22
The Nature Of Force
Understand that a force is a push or pull resulting from an interaction, which can alter an object's speed, direction, or shape.
Sprint 23
Contact Forces: Muscles And Friction
Differentiate contact forces and understand the microscopic origins of friction.
Sprint 24
Non-Contact Forces: Action At A Distance
Understand forces that act across space without touching (magnetic, electrostatic, gravitational) and their attractive/repulsive nature.
Sprint 25
Mass, Weight, And Spring Balances
Distinguish between mass and weight, and understand how a spring balance measures gravitational force.
Sprint 26
Floating, Sinking, And Buoyancy
Understand upthrust (buoyancy) and how it competes with gravity to determine if an object floats or sinks.
Sprint 27
Chapter Review: Exploring Forces
Consolidate knowledge of all forces, their effects, measurements, and behaviors across contexts.