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Science · Grades 3–6

Ask, observe and compare

Build a fair comparison from a clear question.

Make a worksheet

Learn the idea

Question

A testable question specifies something that can be observed or measured.

Compare

Change one intended factor while keeping other relevant conditions similar.

Repeat

Repeated trials reveal variation rather than guaranteeing an expected answer.

Report

Record what happened, including unexpected results.

Worked examples

Which question is directly measurable?

Distance can be measured under a defined comparison.

Which paper shape travels farther under the same release conditions?

Why keep the release height the same when comparing paper shapes?

A control reduces an alternative explanation.

Height could affect travel distance.

Check your understanding

  1. Travel distances are 2, 3 and 4 m. Find the mean.

  2. What should happen to an unexpected measurement?

    1. Always delete it immediately.
    2. Replace it with the expected result.
    3. Record it and investigate possible causes.

  3. Why is a prediction different from a result?

Answers and marking notes

Answers and marking notes
  1. 3 m

    (2 + 3 + 4)/3 = 3 m.

  2. Record it and investigate possible causes.

    Transparent recording supports reliable interpretation.

  3. A prediction is made before measuring; a result describes the observations.

    Do not label an expectation as observed evidence.

Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.