Everyday Science CSS Paper 1999

Time Allowed: 2 Hours Maximum Marks: 50
Note: Attempt any ten questions. All questions carry equal marks

  1. Discuss in brief, the contribution of Muslim Scientists in the field of biological science.

  2. Describe, in precise statements, various instruments, which are being used in exploring the universe

  3. Explain the Solar System and the unifying characteristics, which the Sun and its planets have.

  4. How the solar and lunar eclipses are caused?

  5. What is Ozonosphere? Discuss the human technologies, which are causing its depletion. What harm to man this depletive state would cause?

  6. Describe the principle and make up of a Television.

  7. What is escape velocity? How the Satellites are launched and what are their uses?

  8. Explain Earthquakes and volcanoes. How volcanoes help in the formation of earth crust?

  9. How characters are transmitted from parents to offspring?

  10. Describe the function of kidneys in the human body.

  11. What are the deficiency effects of the following nutrients in the human body:
    (a) Iron (b) Iodine (c) Fluorine (d) Vitamin A (e) Vitamin D

  12. What are the constituents of human blood and characteristics

13 Differentiate between:
(a) Neurons and neutrons (b) Meiosis and mitosis (c) Heavy water and hard water (d) Climate and weather (e) Isotopes and isobars

  1. Fill in the blanks Write only the correct answers in the answer book. Don’t reproduce the questions.
    (a) Plant cells manufacture their food due to the presence of ____ . (chlorophyll, vacuole, cell wall)
    (b) The mitochondria in a cell are the constituent of the ____ . (nucleus, cytoplasm, cell membrane)
    (c) Mitosis is a type of cell division wherein the number of chromosomes in the daughter cell are the ____ . (same, half, double)
    (d) Blood cells are of _____ types.(two, three, four)
    (e) The ____ causes sunburn and suntan. (ultraviolet rays, alpha particles, gamma radiation)

  2. Which of the following statements are false or true. Write only true or false in the answer book. Don’t reproduce the questions:
    (a) Xylem and phloem are conducting tissues.
    (b) Carbohydrates are cheapest and most ready source of energy.
    (c) Enzymes are responsible for chemical digestion of food.
    (d) Plasma is the fluid part of the blood in which the cells are suspended.
    (e) Haemoglobin combines with oxygen and transport to different cells of the body.
    (f) Neutron is the negative charged particle in an atom.
    (g) Helium is the heaviest gas.
    (h) Venus is the smallest planet of the solar system.
    (i) Image of an object is formed on the retina of the eye.
    (j) Barometer is used for measuring the current.


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