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CM Kids USS quiz Basic Science

All 15 questions from this finished quiz, with the correct answer and explanation. Finished 17 Oct 2026, 11:52 pm IST.
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  1. 1. Which statements about a simple pendulum are correct? (i) Its time period depends on the mass of the bob. (ii) A longer pendulum has a longer time period. (iii) Galileo studied the motion of the pendulum.

    A. (i) and (ii) only

    B. (iii) only

    C. (ii) and (iii) only

    D. (i) only

    Answer: C. (ii) and (iii) only

    Why: The time period increases with length, and Galileo studied pendulums. The period does not depend on the mass of the bob.

  2. 2. Which statements about photosynthesis are correct? (i) The oxygen released comes from water. (ii) Chlorophyll absorbs light energy. (iii) Carbon dioxide is released during photosynthesis.

    A. (i) and (ii) only

    B. (ii) and (iii) only

    C. (i) only

    D. (iii) only

    Answer: A. (i) and (ii) only

    Why: In photosynthesis water is split to release oxygen and chlorophyll traps light energy. Carbon dioxide is taken in, not released.

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