Flash Check — 40+ Questions

Forty-plus rapid questions to test recall before you close the book — cover the answers with your hand.

1. Name all seven SI base units and their symbols.
2. Which SI derived unit is named after the scientist who discovered electromagnetic induction?
3. State the value (approximate) of Avogadro's number and what it represents.
4. Write Newton's second law of motion in symbols, and name the other two laws in one line each.
5. Write all three equations of motion.
6. State the law of universal gravitation in words and symbols.
7. Why does acceleration due to gravity differ between the poles and the equator?
8. Distinguish heat from temperature in one sentence.
9. Name the three modes of heat transfer with one real-world example each.
10. State Ohm's Law, and give the formula for resistance in series and in parallel.
11. Why does household wiring use parallel circuits rather than series?
12. State the mirror formula and the lens formula, and note the one sign difference between them.
13. Why can sound not travel through a vacuum, but light can?
14. Explain the Doppler Effect in one sentence, with a real-world audio example.
15. What did C.V. Raman discover, and what Indian observance commemorates it?
16. Distinguish nuclear fission from nuclear fusion, with one real-world example of each.
17. Name the four groups of the periodic table covered in this book, with one property each.
18. Give the chemical name and formula for baking soda, washing soda, and quicklime.
19. What does the pH scale measure, and what is the approximate pH of human blood?
20. List three differences between metals and non-metals.
21. Write the balanced chemical equation for photosynthesis.
22. What reaction produces soap, and what are its two starting ingredients?
23. Why do onions make you cry, chemically speaking?
24. Why does ice float on water?
25. Name five cell organelles and their functions.
26. Which vitamin deficiency causes night blindness, and which causes scurvy?
27. Name the fat-soluble vitamins and explain why they carry a toxicity risk that water-soluble vitamins don't.
28. State Mendel's three laws of inheritance in one line each.
29. List three differences between DNA and RNA.
30. Match these five scientists to their discovery: Jenner, Fleming, Watson & Crick, Hooke, Linnaeus.
31. Write the dimensional formula for force and for pressure, and explain the method used to derive either.
32. Name the three classes of lever with one everyday example each.
33. State Pascal's Law, Archimedes' Principle, and Bernoulli's Principle in one line each.
34. State Fleming's Left-Hand and Right-Hand rules, and say which is used for a motor and which for a generator.
35. Distinguish a conductor, an insulator, and a semiconductor in one line each, and name the process used to alter a semiconductor's conductivity.
36. What is India's most powerful launch vehicle, and which recent mission did it carry? Distinguish PSLV from GSLV in one line.
37. Name three Nobel laureates of Indian origin in the sciences and their field of recognition.
38. Distinguish atomic number from mass number, and define an isotope with one example.
39. Distinguish an ionic bond from a covalent bond, with one example each.
40. Name three ores and the metal each yields.
41. Name three alloys with their exact metal composition and one use each.
42. State the classification hierarchy from Kingdom to Species, and give the binomial name for humans.
43. Which blood group is the "universal donor" and which is the "universal recipient," and why, in terms of antigens and antibodies?
44. Name three endocrine glands and one hormone each produces, with its main function.
45. State the "10% rule" of an ecological energy pyramid, and explain why it limits food-chain length.
46. Name India's four biodiversity hotspots.
47. Distinguish a bacterium from a virus from a fungus in terms of how each survives/reproduces.
48. What did Ronald Ross discover, where, and what Indian observance commemorates it?
49. Name the hardest known natural substance and explain, in terms of bonding, why it is so hard.
50. Why is Venus hotter than Mercury despite being farther from the Sun?