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Grade 2 · lesson 1 of 4

Separate pollination and seed dispersal

Separate pollination and seed dispersal 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: pollen reaches a suitable flower part. Reference card B: seed moves away from its source.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Bee moves pollen between flowers.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Wind carries a winged seed.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Seed begins sprouting.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Stem becomes taller.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Animal carries a burr containing seeds.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Pollen reaches a flower stigma.

Learn the idea

Pollination moves pollen between appropriate flower parts. Seed dispersal moves seeds after they form. These are different steps; a visit by an animal does not guarantee successful reproduction.

Pollination means pollen reaches a suitable flower part. Seed dispersal means seed moves away from its source. Germination means seed begins growing. Growth means an existing plant becomes larger.

For pollination, look for the clue “pollen reaches a suitable flower part.” For seed dispersal, look for “seed moves away from its source.” 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 “pollen reaches a suitable flower part”; a second states “seed moves away from its source.” The first fits pollination and the second fits seed dispersal. 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 “pollen reaches a suitable flower part” to justify pollination; do not sort by the name alone.
  • Distinguish seed dispersal (seed moves away from its source) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Bee moves pollen between flowers.

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

See the answer and explanation

pollination

The answer is pollination. In the notes, it means “pollen reaches a suitable flower part.” Pollination moves pollen between appropriate flower parts. Seed dispersal moves seeds after they form. These are different steps; a visit by an animal does not guarantee successful reproduction.

Take it further

Create one new case showing pollination and one showing seed dispersal. Expected: the first explicitly shows “pollen reaches a suitable flower part”; the second explicitly shows “seed moves away from its source.” 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: Wind carries a winged seed.
Need a hint?
  • Look for the described feature: seed moves away from its source.
  • 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: Seed begins sprouting.
Need a hint?
  • Look for the described feature: seed begins growing.
  • 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: Stem becomes taller.
Need a hint?
  • Look for the described feature: an existing plant becomes larger.
  • 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.