Scientific Quantities and Units · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Scientific quantities and units

Science · Scientific Inquiry · ages 11-14
Name ______________________   Date ____________

  1. Which unit can record a pencil's length?

    • kilograms (kg)
    • metres (m)
    • seconds (s)

  2. A mass was recorded as '12'. What is needed to tell whether it means grams or kilograms?

    • The unit
    • The object's colour
    • The measurement date

  3. Kilograms and seconds measure the same kind of quantity.

    Circle one:   True   False

  4. 0.4 km equals how many metres?

    • 4.00 m
    • 40.0 m
    • 400 m

  5. A bottle holds 2500 mL of water. How many litres is that?

    Answer: ______________

  6. A student adds pure table salt. Which name identifies its chemical compound?

    • sodium chloride
    • a white crystalline powder
    • an unspecified food seasoning

  7. A recipe needs 0.75 kg of flour. How many grams is that?

    Answer: ______________

  8. A report treats 250 mN and 250 N as equal forces. Which correction is valid?

    • 250 mN equals 250000 N
    • 250 mN equals 0.250 N
    • 250 mN equals 250 N
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Answer key

For grown-ups. Fold this page away before handing over the rest.

Scientific quantities and units W1-mt_vdHqdaflog-s1

  1. metres (m) · Metres measure length. Kilograms measure mass and seconds measure time.
  2. The unit · The unit tells which mass scale the number uses.
  3. False · Kilograms measure mass. Seconds measure time.
  4. 400 m · Multiply the numerical reading by 1000: 0.4 × 1000 = 400. Thus 0.4 km = 400 m.
  5. 2.5 · Divide the numerical reading by 1000: 2500 ÷ 1000 = 2.5. Thus 2500 mL = 2.5 L.
  6. sodium chloride · Sodium chloride identifies the compound in pure table salt. The other choices describe appearance or use.
  7. 750 · Multiply the numerical reading: 0.75 × 1000 = 750. Thus 0.75 kg = 750 g.
  8. 250 mN equals 0.250 N · Milli- means one thousandth. Divide the numerical reading: 250 ÷ 1000 = 0.250. Thus 250 mN = 0.250 N, which is not 250 N.
Worksheet · LightMySky