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Grade 1 · lesson 2 of 4

Use a light-symbol code

Use a light-symbol code using supplied evidence and a solved model.

About 12 minutes, plus any extended practice

Download the grade pack

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: red square labeled STOP. Reference card B: green circle labeled GO.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Reader sees a STOP square.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Reader sees a GO circle.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Reader sees a WAIT triangle.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Reader sees a HELP star.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: A square also says STOP.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: A star also says HELP.

Learn the idea

A code needs an agreed meaning. Color alone may not be accessible to every reader, so symbols and words can support a message. This paper code uses shapes as well as labels.

Stop means red square labeled STOP. Go means green circle labeled GO. Wait means yellow triangle labeled WAIT. Help means blue star labeled HELP.

For stop, look for the clue “red square labeled STOP.” For go, look for “green circle labeled GO.” 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 “red square labeled STOP”; a second states “green circle labeled GO.” The first fits stop and the second fits go. 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 “red square labeled STOP” to justify stop; do not sort by the name alone.
  • Distinguish go (green circle labeled GO) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Reader sees a STOP square.

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

See the answer and explanation

stop

The answer is stop. In the notes, it means “red square labeled STOP.” A code needs an agreed meaning. Color alone may not be accessible to every reader, so symbols and words can support a message. This paper code uses shapes as well as labels.

Take it further

Create one new case showing stop and one showing go. Expected: the first explicitly shows “red square labeled STOP”; the second explicitly shows “green circle labeled GO.” 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: Reader sees a GO circle.
Need a hint?
  • Look for the described feature: green circle labeled GO.
  • 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: Reader sees a WAIT triangle.
Need a hint?
  • Look for the described feature: yellow triangle labeled WAIT.
  • 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: Reader sees a HELP star.
Need a hint?
  • Look for the described feature: blue star labeled HELP.
  • 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.