by Tiwari Academy
NCERT Solutions for Class 8 Science Curiosity Chapter 1 Exploring the Investigative World of Science for Session 2025-26. These solutions help students understand how science begins with curiosity. The chapter teaches how to ask questions, observe things and do simple experiments. It covers topics like microorganisms, health, electricity, force, pressure and light. It also explains ecosystems and Earth’s climate. These solutions are easy to follow and help build scientific thinking. They are useful for learning and revision.
Class 8 Science Curiosity Chapter 1 MCQ
Class 8 Science Old Book Chapter 1 MCQ
Class 8 Science Old Book Chapter 1 Solutions
Class 8 Science Curiosity Chapter 1 Very Short Answer Type Questions
What is the first step of scientific investigation?
See AnswerAsking a question.
What makes a puri puff up?
See AnswerSteam inside the dough.
Name the two effects of electric current.
See AnswerHeating effect and magnetic effect.
What kind of organisms are found in a drop of dirty water?
See AnswerMicroorganisms.
What is used to improve our eyesight?
See AnswerLenses.
Which natural force helps bring a ball back to the ground?
See AnswerGravity.
Which gas helps in breathing?
See AnswerOxygen.
What is the Moon’s appearance change called?
See AnswerPhases of the Moon.
Name one simple scientific tool used in experiments.
See AnswerThermometer.
What type of matter allows particles to move freely?
See AnswerGas.
What does a calendar help us measure?
See AnswerTime.
What is the bending of light called?
See AnswerRefraction.
What kind of surface reflects light well?
See AnswerSmooth surface.
Name one harmful effect of human activity on Earth.
See AnswerClimate change.
What is a mixture?
See AnswerA combination of two or more substances.
Class 8 Science Curiosity Chapter 1 Short Answer Type Questions
What is the importance of curiosity in science?
See AnswerCuriosity helps us ask questions about everyday things and look for their answers through observation and investigation. It is the first step toward becoming a good scientist.
How does a puri puff up while frying?
See AnswerA puri puffs up due to the water in the dough turning into steam when heated. The steam gets trapped inside, making the puri swell like a balloon.
What are microorganisms and why are they important?
See AnswerMicroorganisms are tiny living organisms found in water, air and soil. Some are useful in digestion and making medicines, while others can cause infections.
How do vaccines help us stay healthy?
See AnswerVaccines train our body to fight infections by making it ready to respond to certain harmful microbes, thus protecting us from serious diseases.
What is the heating effect of electric current?
See AnswerWhen an electric current passes through a conductor, it produces heat. This effect is used in devices like electric irons, geysers and heaters.
Explain force with an example.
See AnswerA force is a push or pull that changes the motion of an object. For example, kicking a football applies force and makes it move.
Why do cyclones occur?
See AnswerCyclones form due to a large difference in air pressure. Warm moist air rises quickly, forming strong winds and heavy rain around low-pressure areas.
What is the role of particles in states of matter?
See AnswerParticles in solids are tightly packed, in liquids they slide past each other and in gases they move freely. This movement explains how substances behave.
How do mirrors and lenses help in daily life?
See AnswerMirrors reflect light and help us see our reflection. Lenses bend light and are used in spectacles, microscopes and cameras to see clearly.
Why is Earth suitable for life?
See AnswerEarth is at the right distance from the Sun, has water in liquid form and an atmosphere with oxygen and protection from harmful rays, making life possible.
Class 8 Science Curiosity Chapter 1 Descriptive Questions
Describe the steps involved in scientific investigation.
See Answer1. Ask a focused question based on curiosity.
2. Plan a simple experiment to test the idea.
3. Control one variable at a time.
4. Observe and record carefully.
5. Analyze results and draw conclusions.
Explain how electric current is useful in our daily life.
See Answer1. Provides light through electric bulbs.
2. Heats water in geysers and cooks food in heaters.
3. Runs motors and machines via magnetic effect.
4. Powers home appliances like fans, TVs, and fridges.
Write differences between elements, compounds and mixtures.
See AnswerElement: Pure substance made of one kind of atom (e.g., Iron).
Compound: Two or more elements chemically combined (e.g., Water).
Mixture: Two or more substances physically combined (e.g., Air).
What are the different ways in which light behaves?
See Answer1. Light reflects from smooth surfaces like mirrors.
2. It refracts or bends when passing through lenses.
3. Rough surfaces also scatter light.
4. These properties help in vision and optical devices.
List the reasons why human activities are affecting the Earth’s climate.
See Answer1. urning of fossil fuels increases greenhouse gases.
2. Deforestation reduces oxygen and increases CO₂.
3. Industrial waste pollutes air and water.
4. Excessive use of resources disturbs the natural balance.
Beginning the Journey of Scientific Curiosity and Investigation
Class 8 Science Curiosity Chapter 1 takes students into the fascinating world of scientific investigation, where every “why” and “how” question leads to a deeper understanding of the world around us. Instead of simply memorizing facts, this chapter emphasizes discovering them through exploration. Building on the curiosity nurtured in Classes 6 and 7, Class 8 focuses on sharpening our ability to observe carefully, ask focused questions, perform simple experiments and explain observations logically. The chapter introduces the concept of systematic investigation, where we change one variable at a time to understand its effect. For example, the simple observation of why one side of a puri is thinner than the other becomes a scientific inquiry by changing the dough’s thickness or oil temperature, measuring outcomes and drawing conclusions. This marks the beginning of thinking like a true young scientist.
From Microorganisms to Forces and Particles
Class 8 Science Curiosity Chapter 1 outlines an exciting scientific journey that begins with observing microorganisms in a single drop of water. Some of these tiny organisms are beneficial—helping in digestion or making medicines—while others cause infections. It explains how nutritious food, exercise, medicines and vaccines contribute to health. The role of electric current in our daily life is introduced, covering its heating and magnetic effects, which power many devices. We then move on to the concepts of force, motion and pressure, explaining natural phenomena like how a ball falls or how winds and cyclones form due to pressure differences. Further, the chapter delves into particles of matter, describing how solids, liquids, gases behave and classifies substances into elements, compounds and mixtures. It also introduces solutions, such as how sugar dissolves in tea, highlighting how basic concepts apply to everyday life.
Learn – Light, Ecosystems and the Earth’s Balance – in 8th Science Curiosity
In Class 8 Science Curiosity Chapter 1, the focus shifts to light—its reflection from flat and curved surfaces, its bending through lenses and how it helps in devices like spectacles and mirrors. Even rough surfaces and the Moon reflect light and the phases of the Moon are explained through the positions of the Earth, Moon and Sun. These observations helped early humans create calendars. The chapter then explores ecosystems, where all living organisms—plants, animals, insects—interact with air, water, sunlight and each other. It concludes with the idea that Earth is perfectly suited for life due to its distance from the Sun and the presence of a protective atmosphere. However, it also warns that human activities are disrupting this balance, leading to climate change. 8th Science Curiosity chapter calls on students to use the tools of science—observation, experimentation and reasoning—to become problem solvers and protectors of our planet’s delicate systems.
What kind of questions are asked in Class 8 Science Curiosity Chapter 1?
In Class 8 Science Curiosity Chapter 1, the questions focus on how science begins with our curiosity. You will see questions like “Why does a puri puff up unevenly?” or “How can heat or magnetic effects of electricity be tested?” These questions may appear in various formats—multiple choice, fill-in-the-blanks or short answer. The aim is to encourage you to think: What should I observe? Which variable should I change? What can I conclude? Some questions cover microorganisms, health and vaccines, force, pressure and weather phenomena like cyclones and properties of light such as reflection and refraction. Ultimately, the questions reward understanding of the scientific method—observation, hypothesis, experiment, recording results and reasoning as much as facts.
Why are everyday examples used in Class 8 Curiosity questions?
In Class 8 Science Curiosity Chapter 1, everyday examples—such as frying a puri, observing moon phases or mixing sugar in water—are used to connect science to real life. This approach makes the concepts more relatable and memorable. When a student sees how variables affect puffing or how lenses work to help eyesight, the learning becomes practical. Questions based on these examples test whether you can apply concepts beyond textbook definitions. For instance, if an MCQ asks what changes if oil temperature is cooler or dough thicker, you should think about cause-and-effect rather than recall. This approach builds thinking skills: noticing patterns, controlling one variable at a time, making observations and drawing clear conclusions. Such grounded examples help turn textbook learning into meaningful understanding.
How does scientific investigation feature in Class 8 Science Curiosity?
Every Class 8 Science Curiosity Chapter 1 question reminds students that science is not about memorizing facts but investigating the unknown. The chapter lays out steps: start with a focused question (like “What makes a puri puff unevenly?”), design an experiment controlling one variable, observe carefully and record findings and then analyze results to answer your original question or generate new questions. Common FAQs in that context ask, “Why change only one variable?” or “Why keep notes during the experiment?” The answers emphasize clarity—changing just one factor at a time helps isolate cause and effect and note-taking helps compare results across trials. This method trains a scientific mindset, not only for exams but for everyday reasoning: asking questions, experimenting, observing and reaching logical conclusions.
What are the key topics students must understand from Class 8 Curiosity Chapter 1?
Key topics from Class 8 Science Curiosity Chapter 1 include scientific curiosity and the investigative process, effects of electricity (heating and magnetic), forces and pressure, the particulate nature of matter, elements/compounds/mixtures, light behavior and Earth’s ecosystems and climate balance. Questions often check if you understand each topic deeply—not just its name. For example, you may be asked: “How do you distinguish a compound from a mixture?” or “What causes cyclones?” or “How do lenses help vision?” To answer well, you must explain what particles do in solids, liquids and gases; how pressure differences lead to wind; why lenses bend light; and how ecosystems maintain balance. Understanding these topics helps you apply science in exams and in real-world thinking about health, environment and technology.
How should one prepare for questions from Class 8 Science Chapter 1?
Preparation for Class 8 Science Curiosity Chapter 1 should be systematic and thoughtful. First, read the chapter carefully and try to link each concept to a real-world example. Visualize and perform simple experiments, such as observing bubbles when sugar dissolves or how a mirror reflects light. Use flashcards for key definitions like observation, hypothesis, variable, pressure and ecosystem. Practice asking questions: “What happens if I change only one thing in a setup?” and consider possible outcomes. Solve a variety of questions—MCQ, short answer, long answer—so you practice reasoning as well as recall. Review the logic behind each answer: why that option is correct and why others are not. Simultaneously, sketch simple diagrams if needed—for example, particle arrangements or light paths. This approach builds both conceptual clarity and exam readiness.
