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Grade 2 · lesson 4 of 4

Improve the failed feature

Improve the failed feature using supplied evidence and a solved model.

About 12 minutes, plus any extended practice

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Supplied materials

  • For younger learners, an adult may read each direction aloud; pointing, drawing and spoken explanations count as responses.
  • Paper, drawing space or a browser document.
  • Reference card A: cover an exposed edge. Reference card B: support a bending span.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Roof misses an outside edge.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Bridge bends under the load.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Water passes through a center hole.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: New drawing lacks a test.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Side toy remains uncovered.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Support span folds in test.

Learn the idea

Choose a change aimed at the observed failure. Changing everything at once makes it harder to identify the useful change. After revision, compare under matched supplied conditions.

Widen means cover an exposed edge. Reinforce means support a bending span. Close means seal the shown gap. Retest means collect a revised-design result.

For widen, look for the clue “cover an exposed edge.” For reinforce, look for “support a bending span.” 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 “cover an exposed edge”; a second states “support a bending span.” The first fits widen and the second fits reinforce. 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 “cover an exposed edge” to justify widen; do not sort by the name alone.
  • Distinguish reinforce (support a bending span) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Roof misses an outside edge.

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

See the answer and explanation

widen

The answer is widen. In the notes, it means “cover an exposed edge.” Choose a change aimed at the observed failure. Changing everything at once makes it harder to identify the useful change. After revision, compare under matched supplied conditions.

Take it further

Create one new case showing widen and one showing reinforce. Expected: the first explicitly shows “cover an exposed edge”; the second explicitly shows “support a bending span.” 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: Bridge bends under the load.
Need a hint?
  • Look for the described feature: support a bending span.
  • 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: Water passes through a center hole.
Need a hint?
  • Look for the described feature: seal the shown gap.
  • 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: New drawing lacks a test.
Need a hint?
  • Look for the described feature: collect a revised-design result.
  • 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.