Curiosity: Textbook of Science for Grade 8
Chapter 1: Exploring the Investigative World of Science
- Probe and ponder
- Dear Young Scientists
- Overview: from microbes to planet-wide challenges
- Thinking like a scientist: why is one side of a puri thinner than the other?
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 2: The Invisible Living World: Beyond Our Naked Eye
- Probe and ponder
- Activity 2.1: Let us observe
- 2.1 What Is a Cell?
- 2.2 What Are the Levels of Organisation in the Body of a Living Organism?
- 2.3 What Are Microorganisms?
- 2.4 How Are We Connected to Microbes?
- Keep the curiosity alive
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 3: Health: The Ultimate Treasure
- Probe and ponder
- 3.1 Health: Is It More Than Not Falling Sick?
- 3.2 How Can We Stay Healthy?
- 3.3 How Do We Know That We Are Unwell?
- 3.4 Diseases: What Are the Causes and Types?
- 3.5 How to Prevent and Control Diseases?
- Keep the curiosity alive
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 4: Electricity: Magnetic and Heating Effects
- Probe and ponder
- Activity 4.1: Let us investigate
- 4.1.1 Electromagnets
- 4.2 Does a Current Carrying Wire Get Hot?
- 4.3 How Does a Battery Generate Electricity?
- Keep the curiosity alive
- Discover, design, and debate
- Projects
- A step further
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 5: Exploring Forces
- Probe and ponder
- 5.1 What Is a Force?
- 5.4 What Are the Different Types of Forces?
- 5.5 Weight and Its Measurement
- 5.6 Floating and Sinking
- Keep the curiosity alive
- Snapshots
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 6: Pressure, Winds, Storms, and Cyclones
- Probe and ponder
- 6.1 Pressure
- 6.2 Pressure Exerted by Air
- 6.3 Formation of Wind
- 6.5 Storms, Thunderstorms, and Lightning
- 6.6 Cyclone
- Keep the curiosity alive
- Snapshots
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 7: Particulate Nature of Matter
- Probe and ponder
- 7.1 What Is Matter Composed of?
- 7.2 What Decides Different States of Matter?
- Keep the curiosity alive
- Snapshots
- Discover, design, and debate
- A step further
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 8: Nature of Matter: Elements, Compounds, and Mixtures
- Probe and ponder
- 8.1 What Are Mixtures?
- 8.2 What Are Pure Substances?
- 8.3 What Are the Types of Pure Substances?
- 8.5 What Are Minerals?
- Keep the curiosity alive
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 9: The Amazing World of Solutes, Solvents, and Solutions
- Probe and ponder
- 9.1 What Are Solute, Solvent, and Solution?
- 9.2 How Much Solute Can a Fixed Amount of Solvent Dissolve?
- 9.3 Solubility of Gases
- 9.4 Why Do Objects Float or Sink in Water?
- 9.5 What Is Density?
- Keep the curiosity alive
- Discover, design, and debate
- Our scientific heritage
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 10: Light: Mirrors and Lenses
- Probe and ponder
- 10.1 What Are Spherical Mirrors?
- 10.2 What Are the Characteristics of Images Formed by Spherical Mirrors?
- 10.3 What Are the Laws of Reflection?
- 10.4 What Is a Lens?
- Keep the curiosity alive
- Discover, design, and debate
- Our scientific heritage
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 11: Keeping Time with the Skies
- Probe and ponder
- Activity 11.1: Let us explore*
- 11.1.1 Phases of the Moon
- Keep the curiosity alive
- Discover, design, and debate
- Projects
- A step further
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 12: How Nature Works in Harmony
- Probe and ponder
- Activity 12.1: Let us explore
- 12.2 Who All Live Together in Nature?
- 12.5 Who Eats Whom?
- 12.6 What Happens to Waste in Nature?
- 12.7 How Does One Change Lead to Another?
- 12.9 What Are the Benefits of an Ecosystem?
- Keep the curiosity alive
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Chapter 13: Our Home: Earth, a Unique Life Sustaining Planet
- Probe and ponder
- 13.1 Why Is Earth a Unique Planet?
- 13.3 What Makes the Earth Suitable for Life to Exist ?
- 13.4 What Allows Life to Be Sustained on Earth?
- 13.5 What Keeps Life from Disappearing?
- 13.6 What Are the Threats to Life on Earth?
- Keep the curiosity alive
- Discover, design, and debate
- Projects
Official NCERT PDF (English) · हिंदी माध्यम PDF
Free sample questions
Three sample questions with answers. Full explanations — and the rest of the question bank — are free to read after you sign up.
Q1. A pond has 40 fish of one kind, 15 frogs of one kind and 200 duckweed plants. These three groups together are best described as
- one population of 255 organisms
- three communities in one pond
- three populations that are part of one community
- three ecosystems
Show answer
Correct answer: C. three populations that are part of one community
🔒 The full explanation is free to read after you sign up →
Q2. The Dutch scientist who made better lenses and was the first to clearly see and describe bacteria and blood cells is known as the
- Father of Microbiology
- Father of Genetics
- Father of Vaccination
- Father of Cell Theory
Show answer
Correct answer: A. Father of Microbiology
🔒 The full explanation is free to read after you sign up →
Q3. An object has a mass of 1 kg on the Earth. When it is taken to the Moon, its mass and weight become respectively
- 1 kg and 10 N
- 1.6 kg and 1.6 N
- 10 kg and 10 N
- 1 kg and 1.6 N
Show answer
Correct answer: D. 1 kg and 1.6 N
🔒 The full explanation is free to read after you sign up →
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Chapter lists follow the NCERT textbooks as available to us; textbooks are revised from time to time, so confirm on ncert.nic.in.
