1. What is ,the chemical formula, for (hydrogen peroxide)?
    Answer: “H2O2”..
  2. What is, the main function of ,(white blood cells), in the human body?
    Answer: “To fight infection”..
  3. What is, the chemical symbol, for (calcium),?
    Answer: “Ca”..
  4. What is, the process, by which rocks ,are formed ,from pre-existing rocks called,?
    Answer: “Rock cycle”..
  5. What is ,the unit, of measurement, for (force),?
    Answer: “Newton (N)”..
  6. What is, the chemical symbol, for (carbon dioxide),?
    Answer: “CO2”..
  7. What is, the study, of (the Earth’s history), called?
    Answer: “Geology”..
  8. What is, the chemical formula, for (table sugar),?
    Answer: “C12H22O11”..
  9. What is, the main function, of the (respiratory system), in the human body?
    Answer: “To breathe”..
  10. What is, the chemical symbol, for (chlorine),?
    SeeAnswer: “Cl”..

60.The process, by which rocks, are changed ,into different types of rocks known as…….?
Ans: “Metamorphism”..

  1. What is ,the unit of measurement for (frequency),?
    Answer: “Hertz (Hz)”..
  2. What is, the chemical symbol for (hydrogen),?
    Answer: “H”..

63.The study of the structure, and behaviour of atoms, known as…….?
Answer: “Atomic physics”..

64.: What is, the chemical formula ,for (sulphuric acid),?
Answer: “H2SO4”..

  1. What is, the main function of the nervous system, in the (human body),?
    Answer: “To transmit signals”..
  2. The study ,of the interaction ,between organisms, and their environment known as……?
    Answer: “Ecology”..
  3. What is, the chemical formula ,for (sodium chloride),?
    Answer: “NaCl”..
  4. What is, the main function, of the skeletal system, in the (human body),?
    Answer: “To provide structure and support”..
  5. What is, the chemical symbol, for (silicon),?
    Answer: “Si”..
  6. The process, by which an organism develops, from a fertilized egg known as…..?
    Ans: “Development”..
  7. What is, the unit of measurement ,for (temperature),?
    Answer: “Celsius (°C) or Fahrenheit (°F)”..
  8. What is, the chemical formula, for (vinegar),?
    Answer: “CH3COOH”..
  9. What is, the main function ,of the circulatory system, in the (human body),?
    Answer: “To transport nutrients and oxygen to cells, and remove waste products”..
  10. What is, the chemical symbol, for (mercury),?
    Answer: “Hg”..

75.The process, by which an organism grows ,and develops over time known as…..?
Answer: “Growth”..

  1. What is, the unit of measurement, for (pressure),?
    Answer: “Pascal (Pa) or Atmosphere (atm)”..
  2. What is, the chemical formula, for (aspirin),?
    Answer: “C9H8O4”..
  3. What is, the main function, of the digestive system, in the human body?
    Answer: “To break down food and absorb nutrients”..
  4. What is, the chemical symbol, for (lead),?
    Answer: “Pb”..
  5. The process, by which an organism produces offspring known as…….?
    Ans: “Reproduction”..
  6. What is, the unit of measurement ,for (volume),?
    Answer: “Liter (L) or Cubic meter (m^3)”..
  7. What is, the chemical formula ,for (hydrogen sulphide),?
    Answer: “H2S”..
  8. What is, the main function of, the excretory system, in the human body?
    Answer: “To remove waste products from the body”..
  9. What is, the chemical symbol for, (potassium nitrate),?
    Answer: “KNO3”..

85.The process ,by which an organism, responds to stimuli, in its environment known as…….?
Answer: “Sensitivity”..

  1. What is ,the unit of ,measurement, for (speed),?
    Answer: “Meters per second (m/s) or Kilometre’s per hour (km/h)”..
  2. What is, the chemical formula, for (baking soda),?
    Answer: “NaHCO3”..
  3. What is, the main function of, the endocrine system, in the human body?
    Answer: “To regulate hormones and metabolism”..
  4. What is, the chemical symbol, for (copper),?
    Answer: “Cu”..
  5. The process, by which an organism obtains, and uses energy known as……?
    Answer: “Metabolism”..
  6. What is, the unit of measurement, for (power),?
    Answer: “Watt (W)”..
  7. What is ,the main function of the immune system, in the human body?
    Answer: “To defend against pathogens and foreign substances”..
  8. What is, the chemical symbol, for (sulphur),?
    Answer: “S”..
  9. The process, by which an organism adapts ,to its environment over time known as……?
    Answer: “Evolution”..
  10. What is, the unit of measurement, for (electric potential),?
    Answer: “Volt (V)”..
  11. What is, the chemical formula, for (citric acid),?

Answer: “C6H8O7”..

  1. What is ,the main function of, the muscular system, in the human body?
    Answer: “To produce movement and provide support”..
  2. What is, the chemical symbol ,for (nitrogen dioxide),?
    Answer: “NO2”..
  3. The study ,of matter ,and energy is known as…..?
    Answer: “Physics”..
  4. What is, the chemical symbol, for (oxygen),?
    Answer: “O”..
  5. What is, the force, that pulls objects towards,(the centre of the Earth), 🌎?
    Answer: “Gravity”..

103.The process ,by which plants make, their own food …….?
Answer: “Photosynthesis”..

  1. What is, the main component, of (the Earth’s atmosphere),?
    Answer: “Nitrogen”..
  2. What is, the chemical symbol, for (gold),?
    Answer: “Au”..
  3. The study ,of living organisms ………?
    Answer: “Biology”..

107.The process, by which water changes, from a liquid ,to a gas ……..?
Answer: “Evaporation”..

  1. What is, the chemical symbol, for (carbon dioxide),?
    Answer: “CO2”..

109.: What is, the main function of ,red blood cells, in the human body?
Answer: “Oxygen transport”..

  1. What is, the chemical symbol ,for (sodium),?
    Answer: “Na”..
  2. The process, by which rocks, are broken down, into smaller pieces ……..?
    Answer: “Weathering”..
  3. What is ,the unit of measurement, for (electric current),?
    Answer: “Ampere (A)”..
  4. What is ,the chemical symbol ,for carbon?
    Answer: “C”..
  5. What is ,the layer of, the Earth’s atmosphere, where (weather occurs),?
    Answer: “Troposphere”..
  6. What is ,the only planet, in the solar system, identified to (support life),?
    Answer: “The Earth”..
  7. The study of, the behaviour ,and properties of matter …….?
    Answer: “Chemistry”..
  8. What is ,the chemical symbol ,for (potassium),?
    Answer: “K”..
  9. What is, the main function of, white blood cells ,in the human body?
    Answer: “Immune defense”..
  10. What is, the chemical symbol, for (helium),?
    Answer: “He”..

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”..