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Grade 4 · lesson 4 of 4

Decode a binary picture message

Decode a binary picture message using supplied evidence and a solved model.

About 18 minutes, plus any extended practice

Download the grade pack

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: 00 in this supplied code. Reference card B: 01 in this supplied code.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Received pair 00.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Received pair 01.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Received pair 10.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Received pair 11.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Second received pair 10.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Second received pair 01.

Learn the idea

Digital codes use discrete symbols. In this original paper code, 00 means stop, 01 go, 10 wait and 11 help. The meaning comes from the agreed table.

Stop means 00 in this supplied code. Go means 01 in this supplied code. Wait means 10 in this supplied code. Help means 11 in this supplied code.

For stop, look for the clue “00 in this supplied code.” For go, look for “01 in this supplied code.” 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 “00 in this supplied code”; a second states “01 in this supplied code.” 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 “00 in this supplied code” to justify stop; do not sort by the name alone.
  • Distinguish go (01 in this supplied code) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Received pair 00.

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 “00 in this supplied code.” Digital codes use discrete symbols. In this original paper code, 00 means stop, 01 go, 10 wait and 11 help. The meaning comes from the agreed table.

Take it further

Create one new case showing stop and one showing go. Expected: the first explicitly shows “00 in this supplied code”; the second explicitly shows “01 in this supplied code.” 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: Received pair 01.
Need a hint?
  • Look for the described feature: 01 in this supplied code.
  • 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: Received pair 10.
Need a hint?
  • Look for the described feature: 10 in this supplied code.
  • 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: Received pair 11.
Need a hint?
  • Look for the described feature: 11 in this supplied code.
  • 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.