Grade 3 · lesson 3 of 4

Compare supplied magnetic tests

Compare supplied magnetic tests using supplied evidence and a solved model.

About 18 minutes, plus any extended practice

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Supplied materials

  • All measurements and observations below are supplied classroom examples. They are not data from actual learners or a claim about a particular real site.
  • Paper, drawing space or a browser document.
  • Reference card A: only tested material changes. Reference card B: only separation changes.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Same magnet and gap; iron versus paper.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Same object; two gaps.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: New object and new gap.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Object listed without response.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Only sample material differs.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Only magnet-object gap differs.

Learn the idea

A fair comparison holds distance and magnet constant while changing the material. Do not infer that every shiny or metallic-looking object is magnetic.

Material test means only tested material changes. Distance test means only separation changes. Confounded means material and separation both change. Missing evidence means no result supplied.

For material test, look for the clue “only tested material changes.” For distance test, look for “only separation changes.” More than one process can happen in a real situation. Answer about the one described in this question.

  1. Read or listen to the four science words and what each means. Say how the first two differ.
  2. Choose two of the short cases. Point to the clue that helps you choose a science word for each one. You may draw or say your answer.
  3. Answer each practice question. Say which clue helped you, then check the explanation.
  4. Use the extra task to make two examples that show different science words. Draw or say what makes each one fit.
Worked example

See the method in action

Worked reference-card problem: a card states “only tested material changes”; a second states “only separation changes.” The first fits material test and the second fits distance test. The reason is the described function or change, not the order of the cards or a favorite name. If their descriptions exchange places, their category labels exchange too. Keep the supplied descriptions attached to the correct case.

Your turn

Check your reasoning

Your answer is temporary and is not saved to an account. Download your current answer before leaving or reloading. Written work on paper or in another app stays in your own file.

Helpful tips
  • Use the feature “only tested material changes” to justify material test; do not sort by the name alone.
  • Distinguish distance test (only separation changes) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Same magnet and gap; iron versus paper.

Feedback appears here after you check. This is practice, not a graded school assessment.

See the answer and explanation

material test

The answer is material test. In the notes, it means “only tested material changes.” A fair comparison holds distance and magnet constant while changing the material. Do not infer that every shiny or metallic-looking object is magnetic.

Take it further

Create one new case showing material test and one showing distance test. Expected: the first explicitly shows “only tested material changes”; the second explicitly shows “only separation changes.” Explain the distinction by drawing, speaking or writing. A label without a matching feature is incomplete.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.

More practice: try new cases

Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.

More practice: try new cases
1. Which scientific label fits the specifically described step or feature? Supplied case: Same object; two gaps.
Need a hint?
  • Look for the described feature: only separation changes.
  • Compare the clue with each science word. Use only what the case tells you; do not add a new event.
2. Which scientific label fits the specifically described step or feature? Supplied case: New object and new gap.
Need a hint?
  • Look for the described feature: material and separation both change.
  • Compare the clue with each science word. Use only what the case tells you; do not add a new event.
3. Which scientific label fits the specifically described step or feature? Supplied case: Object listed without response.
Need a hint?
  • Look for the described feature: no result supplied.
  • Compare the clue with each science word. Use only what the case tells you; do not add a new event.

Your choices are temporary. Feedback appears after you check all the answers.

Nothing here is saved to an account or sent to a teacher. Keep your own notes or download them before leaving. The score describes these questions; it does not certify subject mastery.

Check the subject sources

These LifeStarter passages, scenarios and exercises are authored for this Academy with AI assistance and review. External resources keep their publishers’ terms. A grade label suggests a starting level; it does not establish alignment with your school’s complete requirements.