Physical quantities and measurement Quiz - ICSE Class 7 Science

Free practice quiz: Physical quantities and measurement (ICSE Class 7 Science). 44 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is NOT a fundamental unit in the SI system?

   1. Meter
   2. Kilogram
   3. Second
   4. Newton
   Show answer

   Answer: D. Newton

   The Newton (N) is a derived unit, representing the force required to accelerate a mass of one kilogram at a rate of one meter per second squared (kg·m/s²). Meter, kilogram, and second are fundamental SI units.

2. Which of the following is a vector quantity?

   1. Speed
   2. Distance
   3. Displacement
   4. Time
   Show answer

   Answer: C. Displacement

   Displacement is the change in position of an object and has both magnitude and direction. Speed, distance, and time are scalar quantities.

3. Which quantity is defined as the rate of change of velocity?

   1. Speed
   2. Acceleration
   3. Momentum
   4. Force
   Show answer

   Answer: B. Acceleration

   Acceleration is the rate at which an object's velocity changes. It is a vector quantity.

4. What is the CGS unit of force?

   1. Newton
   2. Dyne
   3. Joule
   4. Erg
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   Answer: B. Dyne

   The Dyne is the unit of force in the centimetre-gram-second (CGS) system. 1 Newton = 10⁵ Dynes.

5. Which SI prefix represents 10⁻⁹?

   1. Micro
   2. Nano
   3. Pico
   4. Femto
   Show answer

   Answer: B. Nano

   The SI prefix 'nano-' represents a factor of 10⁻⁹.

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