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. Try segregating the things around you as pure substances or mixtures
  2. Give an example of a metal which (i) is a liquid at room temperature. (ii) can be easily cut with a knife. (iii) is the best conductor of heat. (iv) is a poor conductor of heat.
  3. How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?
  4. An object of mass 100 kg is accelerated uniformly from a velocity of 5 m/s to 8 m/s in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.
  5. How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25°C), which are miscible with each other?
  6. A force of 7 N acts on an object. The displacement of the object is 8 m in the direction of the force. What is the work done by the force?
  7. State the factors on which strength of magnetic field at a point due to a current carrying conductor depends?
  8. Write the charges on subatomic particles.
  9. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be (a) calcium (b) carbon (c) silicon (d) iron.
  10. How many types of elements together make up the xylem tissue? Name them.
  11. Is the distilled water acidic/basic/neutral? How would you verify it?
  12. Why does an aqueous solution of an acid conduct electricity ?
  13. What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?
  14. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
  15. What is electric fuse? Where is it connected in a circuit?
  16. An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on
  17. Explain different types of motion with examples.
  18. A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?
  19. What is the importance of DNA copying in reproduction?
  20. How is the equal genetic contribution of male and female parents ensured in the progeny?
  21. Give any two ways in which non-biodegradable substances would affect the environment.
  22. What is meant by a chemical reaction?
  23. Which tissue makes up the husk of coconut?
  24. What is the role of decomposers in the ecosystem?
  25. What is hydrogenation? What is its industrial application?
  26. When does an electric short circuit occur?
  27. How is the process of pollination different from fertilisation?
  28. Certain force acting on a 20 kg mass changes its velocity from 5 m/s to 2 m/s. Calculate the work done by the force.
  29. Name and state rule used to determine the direction of magnetic field produced around a straight conductor carrying current?
  30. Which kind of elements have tendency to lose electrons? Give example.