Class 6 Science All Chapters Important Questions with Answers (NCERT & CG Board)

 

📘 Chapter 1: The Wonderful World of Science

1. What is Science?
   👉 Science is the study of natural world and surrounding phenomena.
2. Why is science important?
   👉 Science helps us understand nature and improve our daily life.
3. What is observation?
   👉 Observation means carefully watching things using our senses and mind.
4. What is experiment?
   👉 Experiment is a method to test ideas and verify scientific facts.
5. What is curiosity?
   👉 Curiosity is the desire to learn new things and ask questions.
6. What is hypothesis?
   👉 Hypothesis is a possible explanation based on observation and knowledge.
7. What is discovery?
   👉 Discovery means finding something new that was previously unknown.
8. What is invention?
   👉 Invention means creating something new using scientific knowledge and ideas.
9. Who is a scientist?
   👉 A scientist is a person who studies and researches science.
10. Example of science in daily life?
    👉 Cooking food, using electricity, and mobile phones involve science.

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📘 Chapter 2: Diversity in the Living World

1. What is biodiversity?
   👉 Biodiversity means variety of plants, animals and microorganisms in environment.
2. What are living things?
   👉 Living things grow, breathe, reproduce and respond to their surroundings.
3. What are non-living things?
   👉 Non-living things do not grow, breathe or show any life processes.
4. What is classification?
   👉 Classification is grouping organisms based on similarities and differences.
5. Types of plants?
   👉 Plants are classified into herbs, shrubs and trees based on size.
6. Types of animals?
   👉 Animals are divided into vertebrates and invertebrates based on backbone.
7. What are vertebrates?
   👉 Vertebrates are animals which have a backbone or spinal column.
8. What are invertebrates?
   👉 Invertebrates are animals which do not have a backbone.
9. Example of herb?
   👉 Grass is an example of herb with soft and green stem.
10. Example of tree?
    👉 Mango tree is a tall plant with strong woody stem.

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📘 Chapter 3: Mindful Eating

1. What is balanced diet?
   👉 Balanced diet contains all nutrients in proper amount for body health.
2. Main nutrients?
   👉 Main nutrients include carbohydrates, proteins, fats, vitamins and minerals.
3. Energy giving food?
   👉 Carbohydrates and fats provide energy required for daily activities.
4. Body building food?
   👉 Proteins help in growth and repair of body tissues.
5. Protective food?
   👉 Vitamins and minerals protect body from diseases and infections.
6. What is junk food?
   👉 Junk food contains high fat and sugar but very less nutrients.
7. Why drink water?
   👉 Water helps digestion, maintains body temperature and removes waste.
8. What is digestion?
   👉 Digestion is the process of breaking food into simpler substances.
9. What is malnutrition?
   👉 Malnutrition occurs when body does not get proper nutrients.
10. Example of healthy food?
    👉 Fruits, vegetables, milk and grains are examples of healthy food.

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📘 Chapter 4: Exploring Magnets

1. What is a magnet?
   👉 A magnet is an object that attracts iron and magnetic materials.
2. Magnetic materials?
   👉 Iron, nickel and cobalt are examples of magnetic materials.
3. Non-magnetic materials?
   👉 Wood, plastic and rubber do not attract magnets at all.
4. Poles of magnet?
   👉 Every magnet has two poles called north and south pole.
5. Like poles?
   👉 Like poles of magnet repel each other when brought close.
6. Unlike poles?
   👉 Unlike poles of magnet attract each other when brought close.
7. What is magnetic field?
   👉 Magnetic field is the area around magnet where force acts.
8. Uses of magnet?
   👉 Magnets are used in compass, speakers and refrigerator doors.
9. What is compass?
   👉 Compass is a device used to find direction using magnet.
10. Magnet loses power when?
    👉 Magnet loses power when heated, dropped or hammered repeatedly.

📘 Chapter 5: Measurement of Length and Motion

1. What is measurement?
   👉 Measurement is the process of comparing unknown quantity with standard unit.
2. SI unit of length?
   👉 SI unit of length is meter used worldwide for measurement.
3. What is motion?
   👉 Motion is change in position of an object with time.
4. Types of motion?
   👉 Types include linear motion, circular motion and periodic motion.
5. What is rest?
   👉 Rest means no change in position of object with time.
6. What is distance?
   👉 Distance is total length of path covered by moving object.
7. Measuring tools?
   👉 Scale, measuring tape and meter rod are common measuring tools.
8. What is uniform motion?
   👉 Uniform motion means covering equal distances in equal intervals of time.
9. Non-uniform motion?
   👉 Non-uniform motion means covering unequal distances in equal time intervals.
10. Unit of time?
    👉 SI unit of time is second used for scientific measurements.

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📘 Chapter 6: Materials Around Us

1. What is matter?
   👉 Matter is anything that has mass and occupies space.
2. Types of materials?
   👉 Materials are classified as solids, liquids and gases based on properties.
3. Soluble substances?
   👉 Substances that dissolve in water are called soluble substances.
4. Insoluble substances?
   👉 Substances that do not dissolve in water are called insoluble.
5. Transparent materials?
   👉 Materials through which light passes clearly are called transparent materials.
6. Opaque materials?
   👉 Materials that do not allow light to pass are called opaque.
7. What is hardness?
   👉 Hardness is property of material resisting scratching or deformation easily.
8. What is density?
   👉 Density is mass per unit volume of a substance.
9. Uses of materials?
   👉 Materials are used to make different objects for daily use.
10. Example of liquid?
    👉 Water, milk and oil are common examples of liquids.

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📘 Chapter 7: Temperature and its Measurement

1. What is temperature?
   👉 Temperature measures degree of hotness or coldness of an object.
2. Unit of temperature?
   👉 Celsius is commonly used unit for measuring temperature in daily life.
3. Instrument used?
   👉 Thermometer is used to measure temperature of body or objects.
4. Normal body temperature?
   👉 Normal human body temperature is approximately thirty seven degree Celsius.
5. Boiling point of water?
   👉 Water boils at one hundred degree Celsius under normal conditions.
6. Freezing point?
   👉 Water freezes at zero degree Celsius under normal conditions.
7. Types of thermometer?
   👉 Clinical thermometer and laboratory thermometer are commonly used types.
8. Heat vs temperature?
   👉 Heat is energy while temperature measures hotness or coldness.
9. What is fever?
   👉 Fever is condition when body temperature rises above normal level.
10. Safety rule?
    👉 Handle thermometer carefully and avoid breaking or shaking it unnecessarily.

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📘 Chapter 8: A Journey through States of Water

1. Three states of water?
   👉 Water exists in solid, liquid and gaseous forms in nature.
2. Ice to water process?
   👉 Ice changes into water through melting when heated sufficiently.
3. Water to vapor?
   👉 Water changes into vapor through evaporation or boiling process.
4. Vapor to water?
   👉 Water vapor changes into liquid through condensation when cooled.
5. What is freezing?
   👉 Freezing is process where liquid changes into solid on cooling.
6. What is boiling?
   👉 Boiling is rapid conversion of liquid into gas at fixed temperature.
7. Water cycle?
   👉 Water cycle is continuous movement of water between earth and atmosphere.
8. Importance of water?
   👉 Water is essential for survival of all living organisms on earth.
9. What is humidity?
   👉 Humidity is amount of water vapor present in the air.
10. Example of gas state?
    👉 Steam is gaseous form of water present in atmosphere.

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📘 Chapter 9: Methods of Separation

1. What is separation?
   👉 Separation is process of removing unwanted substances from useful materials.
2. Handpicking?
   👉 Handpicking is method of separating larger impurities using hands.
3. Winnowing?
   👉 Winnowing separates lighter and heavier particles using wind or air.
4. Sieving?
   👉 Sieving separates particles of different sizes using a sieve.
5. Filtration?
   👉 Filtration separates insoluble solids from liquids using filter paper.
6. Evaporation?
   👉 Evaporation removes liquid by converting it into vapor using heat.
7. Sedimentation?
   👉 Sedimentation is settling down of heavier particles at bottom of liquid.
8. Decantation?
   👉 Decantation is pouring clear liquid after sediment settles at bottom.
9. Churning?
   👉 Churning is used to separate butter from curd by continuous mixing.
10. Importance of separation?
    👉 Separation helps to purify substances and make them usable safely.

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📘 Chapter 10: Living Creatures

1. Characteristics of living things?
   👉 Living things grow, breathe, reproduce and respond to environment changes.
2. What is respiration?
   👉 Respiration is process of taking oxygen and releasing carbon dioxide.
3. What is reproduction?
   👉 Reproduction is process by which organisms produce new individuals.
4. Need of food?
   👉 Food provides energy for growth, repair and survival of organisms.
5. What is movement?
   👉 Movement is change in position or body parts of organism.
6. What is response?
   👉 Response is reaction of organism to changes in surroundings.
7. Example of living thing?
   👉 Human beings, animals and plants are examples of living things.
8. Example of non-living?
   👉 Stone, chair and table are examples of non-living things.
9. What is growth?
   👉 Growth is increase in size and development of living organism.
10. What is excretion?
    👉 Excretion is process of removing waste substances from body.

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📘 Chapter 11: Nature’s Treasures

1. What are natural resources?
   👉 Natural resources are materials obtained from nature useful for humans.
2. Types of resources?
   👉 Resources are classified into renewable and non-renewable resources.
3. Example renewable?
   👉 Sunlight, wind and water are renewable natural resources.
4. Non-renewable?
   👉 Coal, petroleum and natural gas are non-renewable resources.
5. What is conservation?
   👉 Conservation means protecting and saving natural resources from depletion.
6. Why save water?
   👉 Water is limited resource and necessary for survival of all life.
7. What is pollution?
   👉 Pollution is presence of harmful substances in environment causing damage.
8. Types of pollution?
   👉 Air pollution, water pollution and soil pollution affect environment badly.
9. Forest importance?
   👉 Forests provide oxygen, shelter and maintain ecological balance of earth.
10. Reduce reuse recycle?
    👉 These methods help in saving resources and reducing environmental pollution.

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📘 Chapter 12: Beyond Earth

1. What is solar system?
   👉 Solar system consists of sun, planets and other celestial bodies.
2. Star vs planet?
   👉 Stars produce their own light while planets do not.
3. Earth’s satellite?
   👉 Moon is natural satellite that revolves around the earth.
4. What is galaxy?
   👉 Galaxy is a huge system of stars, dust and gases.
5. What is orbit?
   👉 Orbit is fixed path in which planet moves around sun.
6. Closest star?
   👉 Sun is the closest star to the earth.
7. What is astronaut?
   👉 Astronaut is person trained to travel and work in space.
8. What is space?
   👉 Space is vast area beyond earth where planets and stars exist.
9. What is rotation?
   👉 Rotation is spinning of earth on its axis causing day and night.
10. What is revolution?
    👉 Revolution is movement of earth around sun causing seasons.