World 🌎🌎 school of science

120.The process, by which rocks, are formed, from pre-existing rocks ……?
Answer: “Rock cycle”..

  1. What is, the unit of ,measurement ,for (energy),?
    Answer: “Joule (J)”..
  2. What is, the chemical symbol ,for (nitrogen),?
    Answer: “N”..
  3. The study of, the Earth’s physical features……..?
    Answer: “Geography”..
  4. What is, the chemical formula, for (water),?
    Answer: “H2O”..
  5. What is ,the main function of, the respiratory system, in the human body?
    Answer: “Gas exchange”..
  6. What is, the chemical symbol, for (phosphorus),?
    Answer: “P”..
  7. The process ,by which an organism develops, from a fertilized egg …….?
    Answer: “Development”..
  8. What is, the unit of measurement ,for (frequency),?
    Answer: “Hertz (Hz)”..
  9. What is, the chemical symbol, for (hydrogen),?
    Answer: “H”..
  10. The study of the structure, and behaviour of atoms…….?
    Answer: “Atomic physics”..
  11. What is, the chemical formula ,for (sulphuric acid),?
    Answer: “H2SO4”..
  12. What is, the main function of the nervous system, in (the human body),?
    Answer: “Control and coordination”..
  13. What is, the chemical symbol, for (chlorine),?
    Answer: “Cl”
  14. The process ,by which an organism responds, to stimuli in its environment…….?
    Answer: “Sensitivity”..
  15. What is, the unit of measurement, for (speed),?
    Answer: “Meter per second (m/s)”
  16. What is, the chemical formula ,for (sodium chloride),?
    Answer: “NaCl”..
  17. What is, the main function of the immune system ,in the human body?
    Ans. “Defense against pathogens”..
  18. What is, the chemical symbol, for (sulphur),?
    Ans. “S”..

139.The process, by which an organism adapts ,to its environment over time …….?
Ans. “Evolution”..


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