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Grade 1 · lesson 2 of 4

Connect source and receiver

Connect source and receiver 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: object producing the vibration. Reference card B: material through which sound travels.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Label the ringing bell.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Label air between bell and listener.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Label the listening person.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Label the two-ring rule.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Label the vibrating drum.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Label the listening ear.

Learn the idea

A sound source vibrates. Sound travels through matter to a receiver. A drawing’s arrows show a pathway, not objects flying from a bell into an ear.

Source means object producing the vibration. Path means material through which sound travels. Receiver means listener detecting the sound. Code means agreed meaning of the sound pattern.

For source, look for the clue “object producing the vibration.” For path, look for “material through which sound travels.” 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 “object producing the vibration”; a second states “material through which sound travels.” The first fits source and the second fits path. 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 “object producing the vibration” to justify source; do not sort by the name alone.
  • Distinguish path (material through which sound travels) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Label the ringing bell.

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

See the answer and explanation

source

The answer is source. In the notes, it means “object producing the vibration.” A sound source vibrates. Sound travels through matter to a receiver. A drawing’s arrows show a pathway, not objects flying from a bell into an ear.

Take it further

Create one new case showing source and one showing path. Expected: the first explicitly shows “object producing the vibration”; the second explicitly shows “material through which sound travels.” 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: Label air between bell and listener.
Need a hint?
  • Look for the described feature: material through which sound travels.
  • 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: Label the listening person.
Need a hint?
  • Look for the described feature: listener detecting the sound.
  • 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: Label the two-ring rule.
Need a hint?
  • Look for the described feature: agreed meaning of the sound pattern.
  • 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.