Half Yearly Model Question Paper 2019 - 2020

7th Standard EM

    Reg.No. :
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Science

Time : 02:30:00 Hrs
Total Marks : 60

    Multiple Choice Question

    10 x 1 = 10
  1. In thermometer when bulb comes in contact with hot object, liquid inside it

    (a)

    expands

    (b)

    contracts

    (c)

    remains same

    (d)

    none of above

  2. The body temperature of a healthy man is;

    (a)

    00C

    (b)

    370C

    (c)

    980C

    (d)

    1000C

  3. In the circuit shown, which switches (L, M or N) must be closed to light up the bulb

     

    (a)

    switch L only

    (b)

    switch M only

    (c)

    Switch M and N only

    (d)

    either switch L or switches M and N

  4. In which of the following circuits are the bulb connected in series?

    (a)

    (b)

    (c)

    (d)

  5. When a woolen yarn is knitted to get a sweater, the change can be classified as _______ .

    (a)

    physical change

    (b)

    chemical change

    (c)

    endothermic change

    (d)

    exothermic change

  6. ________is an example of a periodic change.

    (a)

    Earthquake.

    (b)

    Formation of rainbow in sky

    (c)

    Occurrence of tides in seas.

    (d)

    Showering of rain

  7. Which part of the cell is called the brain of the cell?

    (a)

    Lysosome

    (b)

    Ribosome

    (c)

    Mitochondria

    (d)

    Nucleus

  8. _______ helps in cell division

    (a)

    Endoplasmic reticulum

    (b)

    Golgi complex

    (c)

    Cnetrivole

    (d)

    Nucleus

  9. The largest division of the living world is __________

    (a)

    Order

    (b)

    Kingdom

    (c)

    Phylum

    (d)

    Family

  10. In Tux Math, Space cadet option is used for ……

    (a)

    Simple addition

    (b)

    Division

    (c)

    Drawing

    (d)

    Multiplication

  11. Answer any 15 questions

    15 x 2 = 30
  12. Temperature of Srinagar (J&K) is — 40C and in Kodaikanal is 30C which of them has greater temperature? What is the difference between the temperatures of these two places?

  13. Jyothi was prepared to measure the temperature of hot water with a clinical thermometer. Is it right or wrong? Why?

  14. What is the use of kink in clinical thermometer?

  15. What is the S.I unit of electrical conductivity?

  16. Name the device used to generate electricity.

  17. Name some devices that run using heat effect of electric current

  18. What is a battery?

  19. Cold milk is heated and it becomes hot. Which type of change it is?

  20. What type of change is artificial ripening of fruit?

  21. What type of change is colouring of a paper?

  22. What are the main things in a nucleus?

  23. What does cell membrane do?

  24. Why lysosomes are known as scavengers of the cell?

  25. Teacher said “A virus is not an organism” Do you agree with this statement or not? Explain Why?

  26. What is classification?

  27. Define – dichotomous key

  28. What is binomial nomenclature?

  29. What is Tux Paint ?

  30. What is Tux Math?

  31. What is the use of Ranger ?

  32. Answer any four questions
    4 x 5 = 20
  33. Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Ramani said it was a wrong way of measuring temperature. Do you agree with Ramani? Explain your answer.

  34. Differentiate parallel and serial circuits.

  35. Define electrical conductivity.

  36. How can a change occur in a substance?

  37. Can you suggest a method to collect water from sea water?

  38. Write correct sequence from cell to organism?

  39. Explain the construction and working of an Telephone.

  40. Explain the construction and working of a dry cell.

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