Lesson Worksheet: Representing Small Values of Physical Quantities Physics • 9th Grade

In this worksheet, we will practice using scientific notation and unit prefixes to multiply and divide values of physical quantities by various powers of ten.


A bullet comes to rest in a time of 5×10 s. What is the time taken for the bullet to come to rest, expressed in decimal form?


Which of the following is equal to one nanowatt when multiplied by one watt?

  • A10
  • B10
  • C10
  • D10
  • E10


A piece of dust has a mass of 0.0065 g. What is the mass of the piece of dust expressed in scientific notation to one decimal place?

  • A6.5×10 g
  • B6.5×10 g
  • C6.5×10 g
  • D6.5×10 g
  • E6.5×10 g


Calculate the volume of a ball of radius 1.2 cm. The volume of the ball is given by 4𝜋3𝑟, where 𝑟 is the radius of the ball.

  • A7.2×10 m3
  • B7.2 m3
  • C1.7×10 m3
  • D1.7 m3


A rectangle has side lengths of 0.02 m and 0.004 m. Calculate the area of the rectangle.

  • A80 μm2
  • B8 μm2
  • C80 nm2
  • D8 nm2


What is the value of 1 centimetre in units of micrometres?

  • A10 μm
  • B10 μm
  • C10 μm
  • D10 μm


What is 6 m3 in litres?

  • A60 litres
  • B600 litres
  • C6 litres
  • D6‎ ‎000 litres


If 𝐴=130ms and 𝐵=2,700µs, calculate the value of 𝐴+𝐵.

  • A0.283 s
  • B0.1327 s
  • C0.2713 s
  • D0.4 s


Which of the following represents the smallest value of voltage?

  • AMicrovolt
  • BPicovolt
  • CMillivolt
  • DNanovolt


Which of the following is the smallest quantity of mass?

  • A0.043 mg
  • B0.043 g
  • C430 µg
  • D0.00043 kg

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