Very Short Answer Questions: Exploring the Investigative World of Science | Science Curiosity Class 8 - New NCERT PDF Download

Q1. What do scientists first do when they begin an investigation?
Ans: Scientists begin by asking clear “Why?” and “How?” questions.

Q2. What does “systematic investigation” mean?
Ans: Systematic investigation means testing step-by-step while changing only one variable at a time.

Q3. What is a variable in an experiment?
Ans:  A variable is something you can change, like temperature or size, to see its effect on the experiment.

Q4. Why is it important to control variables?
Ans:  Controlling variables helps us know which change caused the result.

Q5. What should you always do after observing an experiment?
Ans:  You should record your observations carefully after observing an experiment.

Q6. What do the “roots” symbolize in science learning?
Ans:  Roots symbolize careful observation and building ideas on solid facts.

Q7. What does the “kite” symbolize in science learning?
Ans:  The kite symbolizes creativity and imaginative thinking in exploration.

Q8. Why does curiosity matter in science?
Ans:  Curiosity leads to questions that start investigations and discoveries.

Q9. What are microbes?
Ans:  Microbes are tiny living organisms that we cannot see with our naked eye.

Q10. How do some microbes help us?
Ans:  Some microbes help in digestion and making medicines and fermented foods.

Q11. What does “prevention is better than cure” mean in health?
Ans:  It means staying clean and vaccinated to avoid getting sick.

Q12. What is the role of the immune system?
Ans:  The immune system protects our body by fighting germs and diseases.

Q13. What is the heating effect of electricity used for?
Ans:  The heating effect is used in devices like heaters and electric irons.

Q14. What is the magnetic effect of electricity used for?
Ans:  The magnetic effect is used to run electric motors and many machines.

Q15. What can a force do to an object?
Ans:  A force can start, stop, speed up, slow down, or change the direction of an object.

Q16. What is friction?
Ans:  Friction is a force that resists motion and slows moving objects.

Q17. What is pressure?
Ans:  Pressure is the force applied per unit area on a surface.

Q18. How are winds formed?
Ans:  Winds are formed by differences in air pressure that move air from high to low pressure.

Q19. What are the three states of matter?
Ans:  The three states of matter are solid, liquid, and gas.

Q20. What is an element?
Ans:  An element is a pure substance made of only one kind of atom, like oxygen.

Q21. What is a solution?
Ans:  A solution is a mixture where a solute dissolves evenly in a solvent.

Q22. How does light travel?
Ans:  Light travels in straight lines and can reflect from mirrors or refract through lenses.

Q23. What causes the phases of the Moon?
Ans:  The phases of the Moon are caused by the Moon’s changing positions relative to Earth and the Sun.

Q24. What is an ecosystem?
Ans:  An ecosystem is a community where living things interact with each other and with nonliving things like air, water, and sunlight.