Chapter-1. Exploring the Investigative World of Science Science Curiosity class 8 in english Medium CBSE Notes

🔹 1. Introduction: Science and Curiosity

MCQ 20 Questions: for practice:

1. Science begins with:

   • A. Reading books
   • B. Curiosity
   • C. Writing
   • D. Memorizing

2. Scientific investigation involves:

   • A. Guessing
   • B. Experimenting
   • C. Sleeping
   • D. Ignoring

3. Which is the first step of the scientific method?

   • A. Conclusion
   • B. Experiment
   • C. Observation
   • D. Result

4. Which of the following is a microorganism?

   • A. Dog
   • B. Bacteria
   • C. Tree
   • D. Human

5. Force is:

   • A. Energy
   • B. Push or pull
   • C. Speed
   • D. Motion

6. Pressure depends on:

   • A. Mass
   • B. Force and area
   • C. Time
   • D. Volume

7. Matter is:

   • A. Energy
   • B. Anything with mass and space
   • C. Light
   • D. Sound

8. Which state of matter has fixed shape?

   • A. Liquid
   • B. Gas
   • C. Solid
   • D. Plasma

9. Reflection of light means:

   • A. Bending
   • B. Absorption
   • C. Bouncing back
   • D. Passing through

10. Refraction of light is:

    • A. Reflection
    • B. Bending of light
    • C. Absorption
    • D. Emission

11. Electric current produces:

    • A. Sound
    • B. Heat and magnetism
    • C. Light only
    • D. Gravity

12. Which is a compound?

    • A. Oxygen
    • B. Water
    • C. Air
    • D. Sand

13. Mixture can be:

    • A. Chemically combined
    • B. Physically combined
    • C. Fixed
    • D. Pure

14. Ecosystem includes:

    • A. Only animals
    • B. Only plants
    • C. Living and non-living things
    • D. Only water

15. Moon phases occur due to:

    • A. Earth rotation
    • B. Sunlight reflection and position
    • C. Clouds
    • D. Wind

16. Climate change is caused by:

    • A. Plants
    • B. Animals
    • C. Human activities
    • D. Rocks

17. Experiment should change:

    • A. All variables
    • B. One variable at a time
    • C. No variables
    • D. Random variables

18. Scientific method ensures:

    • A. Guesswork
    • B. Accuracy
    • C. Confusion
    • D. Random results

19. Curiosity helps in:

    • A. Ignoring
    • B. Learning and exploring
    • C. Sleeping
    • D. Forgetting

20. Which is used to observe results?

    • A. Guess
    • B. Observation
    • C. Memory
    • D. Opinion

One Mark Questions:

1. Define science.
2. What is curiosity?
3. What is an experiment?
4. Define force.
5. What is pressure?
6. What is matter?
7. Name one microorganism.
8. What is reflection of light?
9. What is refraction?
10. What is an ecosystem?

Two Marks Questions:

1. Write any two steps of the scientific method.
2. Differentiate between element and compound.
3. Give two examples of microorganisms.
4. Write two effects of electric current.
5. Explain force with an example.
6. What is pressure? Give formula.
7. Differentiate between solid and liquid.
8. Give two examples of reflection of light.
9. What is a mixture? Give example.
10. Why is observation important in science?

Three Marks Questions

1. Explain the scientific method in steps.
2. Describe the role of curiosity in science.
3. Explain the classification of matter.
4. What is force and pressure? Explain with examples.
5. Explain reflection and refraction of light.
6. Describe the importance of microorganisms.
7. Explain ecosystem with example.
8. What is climate change? Causes and effects.
9. Explain electricity and its uses.
10. Describe an experiment (puri puffing example).

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