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Grade 2 · lesson 2 of 4

Distinguish weathering and erosion

Distinguish weathering and erosion 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: rock breaks into smaller material. Reference card B: rock or sediment moves.
  • Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Rock splits into smaller pieces.
  • Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Stream carries sand downstream.
  • Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Sand settles where water slows.
  • Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Land gradually rises.
  • Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Ice breaks a rock crack wider.
  • Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Wind moves loose sand.

Learn the idea

Weathering breaks down rock. Erosion moves rock or sediment; deposition leaves it in a new place. Several processes can occur in the same landscape.

Weathering means rock breaks into smaller material. Erosion means rock or sediment moves. Deposition means moved sediment settles somewhere. Uplift means land is raised by Earth processes.

For weathering, look for the clue “rock breaks into smaller material.” For erosion, look for “rock or sediment moves.” 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 “rock breaks into smaller material”; a second states “rock or sediment moves.” The first fits weathering and the second fits erosion. 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 “rock breaks into smaller material” to justify weathering; do not sort by the name alone.
  • Distinguish erosion (rock or sediment moves) from a different process occurring in the same situation.
Which scientific label fits the specifically described step or feature? Supplied case: Rock splits into smaller pieces.

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

See the answer and explanation

weathering

The answer is weathering. In the notes, it means “rock breaks into smaller material.” Weathering breaks down rock. Erosion moves rock or sediment; deposition leaves it in a new place. Several processes can occur in the same landscape.

Take it further

Create one new case showing weathering and one showing erosion. Expected: the first explicitly shows “rock breaks into smaller material”; the second explicitly shows “rock or sediment moves.” 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: Stream carries sand downstream.
Need a hint?
  • Look for the described feature: rock or sediment moves.
  • 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: Sand settles where water slows.
Need a hint?
  • Look for the described feature: moved sediment settles somewhere.
  • 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: Land gradually rises.
Need a hint?
  • Look for the described feature: land is raised by Earth processes.
  • 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.