Term 1 Two Marks Model Questions

8th Standard EM

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Science

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 2 = 10
  1. Assertion: The SI system of units is the suitable system for measurements.
    Reason: The SI unit of temperature is Kelvin.
    a. If both assertion and reason are true and reason is the correct explanation of the assertion.
    b. If both assertion and reason are true but reason is not the correct explanation of the assertion.
    c. Assertion is true, but reason is false.
    d. Assertion is false, but reason is true.

  2. Assertion: Avogadro’s number is the number of atoms in one mole of substance.
    Reason: Avogadro’s number is a constant
    a. If both assertion and reason are true and reason is the correct explanation of the assertion.
    b. If both assertion and reason are true but reason is not the correct explanation of the assertion.
    c. Assertion is true, but reason is false.
    d. Assertion is false, but reason is true.

  3. Assertion: Broad straps are used in bags.
    Reason: Broad straps last for long life.
    a. If both assertion and reason are true and the reason is the correct explanation of the assertion.
    b. If both assertion and reason are true, but the reason is not the correct explanation of the assertion.
    c. If the assertion is true, but the reason is false.
    d. If the assertion is false, but the reason is true.

  4. Assertion: Algae are heterotrophic.
    Reason: They don’t have chlorophyll.
    (a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
    (b) If both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
    (c) If Assertion is true but Reason is false.
    (d) If both Assertion and Reason are false.

  5. Assertion (A): Some algae are living as colonial form.
    Reason (R): Some of the algae are Symbionts.
    a. Both are correct
    b. Both are wrong
    c. A is correct R is wrong
    d. A is wrong R is correct

  6. 20 x 2 = 40
  7. What is the unit of mass in FPS system?

  8. Mention the types of clocks based on their display.

  9. Give two examples to verify that a force changes the shape of a body.

  10. Which has greater viscosity, oil or honey? Why?

  11. Name some things which exert larger pressure on a smaller area?

  12. The radius of curvature of a spherical mirror is 20 cm. Find its focal length.

  13. Refractive index of water is 4/3 and the refractive index of glass is 3/2. Find the refractive index of glass with respect to the refractive index of water.

  14. Who founded the Book "On Burning Mirrors"?

  15. Name two soft metals that can be cut with a knife.

  16. Give two examples for metalloids.

  17. What are metals?

  18. Define catalysis

  19. What is rusting?

  20. Name the bacteria used in the production of vinegar.

  21. Who discovered penicillin?

  22. Write any two characters of dicotyledons.

  23. Define SCP

  24. What is cell differentiation?

  25. Explain why are you not able to breathe normally when you are in closed and crowded places?

  26. Define Arithmetic Logic Unit.

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