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Science · Grades 3–7

Measurement, units and observations

Use a unit appropriate to the quantity and size being measured.

Make a worksheet

Understand the idea

Choose suitable units

Use a unit appropriate to the quantity and size being measured.

Report what happened

Keep observations distinct from explanations you infer.

Examples and reasoning

Which unit is appropriate for the mass of a small apple?

grams

grams

Which instrument is suited to measuring temperature?

a thermometer

a thermometer

Check your understanding

  1. Which instrument directly measures duration?

    1. a stopwatch
    2. a magnet
    3. a measuring cylinder
    4. a ruler

  2. A length is 3.5 m. Convert it to cm.

  3. A container holds 1.2 L. Convert to mL.

  4. Which is an observation?

    1. The liquid changed from clear to cloudy.
    2. The experiment must be perfect.
    3. The sample is dangerous.
    4. A new substance definitely formed.

Answers and marking notes

Answers and marking notes
  1. a stopwatch

    a stopwatch

  2. 350

    3.5 × 100 = 350

  3. 1200

    1.2 × 1000 = 1200

  4. The liquid changed from clear to cloudy.

    The liquid changed from clear to cloudy.

Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.