CBSE  /  Class 7  /  Science  /  Reproduction in Plants

  • 1. 
    A bus travels 54 km in 90 minutes. The speed of the bus is

  • 0. 6 m/s
  • 10 m/s
  • 5. 4 m/s
  • 3. 6 m/s

  • 2. 
    If we denote speed by S, distance by D and time by T, the relationship between these quantities is

  • S = D T
  • T = \(\frac{S}{D}\)
  • S = \(\frac{1}{T}\) × D
  • S = \(\frac{T}{D}\)

  • 3. 
    Observe the figure given below:

  • A to B and back to A
  • O to A, A to B and B to A
  • B to A, A to B and B to O
  • A to B

  • 4. 
    Nearly all the clocks make use of

  • straight line motion
  • periodic motion
  • random motion
  • circular motion

  • 5. 
    A simple pendulum takes 42 sec. to complete 20 oscillations. What is its time period?

  • 2. 1 s
  • 4. 2 s
  • 21 s
  • 8. 40 s

  • 6. 
    Time period of a simple pendulum depends upon its

  • weight of bob
  • length
  • both (a) and (b)
  • None of these

  • 7. 
    Which of the following cannot be used for measurement of time?

  • A leaking tap
  • Simple pendulum
  • Shadow of an object during the day
  • Blinking of eyes

  • 8. 
    On which axis is dependent variable represented?

  • x-axis
  • y-axis
  • On any axis
  • Depends on the data

  • 9. 
    The correct symbol to represent the speed of an object is:

  • 5 m/s
  • 5 mp
  • 5 m/s
  • 5 s/m

  • 10. 
    Boojho walks to his school which is at a distance of 3 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. His average speed in km/h is

  • 8. 3
  • 7. 2
  • 5
  • 3. 6
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