Science

Science is the systematic study of the natural world through observation, experimentation, and analysis. It involves forming hypotheses, conducting experiments, collecting data, and analyzing results to develop conclusions and theories. The primary aim of science is to understand how the universe works, from the smallest particles to the vastness of space.

Science is divided into several branches:

  • Physical Sciences – These include physics, chemistry, astronomy, and geology, and they focus on understanding the laws of matter and energy.
  • Life Sciences –These focus on living organisms and include fields like biology, ecology, and medicine.
  • Social Sciences – These study human behavior and societies, such as psychology, sociology, and economics.
  • Environmental Science –The study of the environment and the impact of human activity on it.

Scientific discoveries and advancements often lead to new technologies that improve our quality of life. Science helps answer fundamental questions about existence, provides solutions to real-world problems, and drives progress in many areas of life.

List of Science Topics
Work and EnergyStructure of The Atom
Our EnvironmentHeredity
The Human Eye and the Colourful WorldMagnetic Effects of Electric Current
ElectricityHow do Organisms Reproduce?
Atoms AND MoleculesGravitation
Matter In Our SurroundingsLight – Reflection and Refraction
Control and CoordinationLife Processes
Carbon and its CompoundsMetals and Non-metals
Acids, Bases and SaltsChemical Reactions and Equations
Forces and Laws of MotionTissues
Motion and TimeIs Matter Around Us Pure ?
PhotosynthesisNutrition in Plants

Question related to Science

  1. What are valence electrons? Give example.
  2. What is the function of an earth wire? Why is it necessary to earth metallic casing of electric appliances?
  3. Define alternating current and direct current.
  4. Group of cells, which is similar in structure and function are structured into___________
  5. What could be the reasons for adopting contraceptive methods?
  6. We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object?
  7. People use a variety of methods to wash clothes. Usually after adding the soap, they ‘beat’ the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessary to get clean clothes?
  8. The inner lining of the mouth is made of:
  9. Write the charges on subatomic particles.
  10. How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?
  11. State the effect of a magnetic field on the path of a moving charged particle.
  12. Which signals will get disrupted in case of a spinal cord injury?
  13. Which of the following is correct about particles in matter?
  14. Name and state rule used to determine the direction of magnetic field produced around a straight conductor carrying current?
  15. What is the role of the seminal vesicles and the prostate gland?
  16. Define the term induced electric current.
  17. What are amphoteric oxides? Give two examples of amphoteric oxides.
  18. Why do ionic compounds have high melting points?
  19. Akhtar, Kiran and Rahul were riding in a motorcar that was moving with a high velocity on an expressway when an insect hit the windshield and got stuck on the windscreen. Akhtar and Kiran started pondering over the situation. Kiran suggested that the insect suffered a greater change in momentum as compared to the change in momentum of the motorcar (because the change in the velocity of the insect was much more than that of the motorcar). Akhtar said that since the motorcar was moving with a larger velocity, it exerted a larger force on the insect. And as a result the insect died. Rahul while putting an entirely new explanation said that both the motorcar and the insect experienced the same force and a change in their momentum. Comment on these suggestions.
  20. Name the three common defects of vision. What are their causes? Name the type of lens used to correct each of them.
  21. What is meant by saying that the potential difference between two points is 1 V?
  22. Give a test that can be used to differentiate between saturated and unsaturated hydrocarbons
  23. What is the role of decomposers in the ecosystem?
  24. An object of mass 1 kg travelling in a straight line with a velocity of 10 m/s collides with and sticks to a stationary wooden block of mass 5 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.
  25. Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions
  26. Why is it advised to tie any luggage kept on the roof of a bus with a rope?
  27. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?
  28. If someone in the family is suffering from a problem of acidity after overeating, which of the following substances would you suggest as a remedy?
  29. What are the problems caused by the non-biodegradable wastes that we generate?
  30. Define the unit of current.