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Grade 2 · lesson 1 of 4

Choose evidence-based materials

Choose evidence-based materials 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: holds the stated load. Reference card B: bends around the stated corner.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Bridge must hold a load.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Wrap must bend around a box.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Pad must soak up a drop.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Window must pass light.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Support must carry a toy.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Viewer must see through a cover.

Learn the idea

A material should suit the job. Our test cards provide four properties. Real samples vary; use only the supplied records and keep the reasoning tied to the intended function.

Strong means holds the stated load. Flexible means bends around the stated corner. Absorbent means takes in the stated water. Transparent means allows the stated light through.

For strong, look for the clue “holds the stated load.” For flexible, look for “bends around the stated corner.” 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 “holds the stated load”; a second states “bends around the stated corner.” The first fits strong and the second fits flexible. 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 “holds the stated load” to justify strong; do not sort by the name alone.
  • Distinguish flexible (bends around the stated corner) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Bridge must hold a load.

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

See the answer and explanation

strong

The answer is strong. In the notes, it means “holds the stated load.” A material should suit the job. Our test cards provide four properties. Real samples vary; use only the supplied records and keep the reasoning tied to the intended function.

Take it further

Create one new case showing strong and one showing flexible. Expected: the first explicitly shows “holds the stated load”; the second explicitly shows “bends around the stated corner.” 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: Wrap must bend around a box.
Need a hint?
  • Look for the described feature: bends around the stated corner.
  • 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: Pad must soak up a drop.
Need a hint?
  • Look for the described feature: takes in the stated water.
  • 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: Window must pass light.
Need a hint?
  • Look for the described feature: allows the stated light through.
  • 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.