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Science lesson plan · 4th grade (Year 5 in England) · 60 minutes

Weathering, erosion or deposition?

Earth and rocks

CCSS NGSS.4-ESS2-1England: KS2 Y3 RocksEngland: KS3 Chemistry: Earth and atmosphere (rock cycle)

Objective and success criteria

Students will: Weathering, erosion or deposition?.

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Weathering and erosion

Leads to: the next skill in this area.

Materials: Rock samples, Hand lenses, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 6 min

  • Quick retrieval from earlier learning (Weathering and erosion). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. Which type of weathering is this: iron in rock rusting? (physical weathering / chemical weathering / biological weathering) → chemical weatheringPrompt: Is it caused by temperature and ice, by a chemical reaction, or by living things?
  2. Which happens quickly rather than over a long time? (a landslide / a river valley widening / a canyon forming / a mountain wearing down) → a landslidePrompt: Some changes to Earth take seconds; others take millions of years.
  3. Which type of weathering is this: acid rain dissolving limestone? (physical weathering / chemical weathering / biological weathering) → chemical weatheringPrompt: Is it caused by temperature and ice, by a chemical reaction, or by living things?

Hook · 6 min

  • Pass round different rocks and ask how each one might have formed.
  • Share the objective: Weathering, erosion or deposition?. Read the success criteria together.

I do: model it · 12 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: Which process is this: tree roots growing into a rock?
  • Step 1: Weathering breaks rock into smaller pieces where it is.
  • Step 2: So the answer is: weathering (rock breaks down in place)
  • Answer: weathering (rock breaks down in place)
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 12 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. Which process is this: a river dropping mud at its mouth to make a delta? (weathering (rock breaks down in place) / erosion (pieces are carried away) / deposition (pieces are dropped)) → deposition (pieces are dropped)Prompt: Breaking, moving or dropping?
  2. Three of these are examples of deposition. Which one is NOT? (acid rain dissolving a limestone statue / a river dropping mud at its mouth to make a delta / sand piling up into a dune / pebbles settling at the bottom of a lake) → acid rain dissolving a limestone statuePrompt: Is the rock being broken, carried, or dropped?

You do: independent practice · 17 min

  • Students work on the student sheet. Circulate and check the first two answers of every student early.
  • Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

Exit ticket · 7 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. A river is fast in the mountains and slow near the sea. Where will it drop most of its mud? (in the clouds / near the sea, where it slows down / in the mountains, where it is fast / it never drops mud) → near the sea, where it slows downPrompt: Slow water cannot carry as much.
  2. Which process is this: water freezing in a crack and splitting a rock? (weathering (rock breaks down in place) / erosion (pieces are carried away) / deposition (pieces are dropped)) → weathering (rock breaks down in place)Prompt: Breaking, moving or dropping?

Watch out for

  • Everyday meanings of words getting in the way of the science meaning: define key words explicitly.
  • Remembering facts without the reason: ask "why?" and "what is the evidence?"

Support and stretch

Support

  • Review first: Weathering and erosion.
  • Use concrete materials: rock samples.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-4.

Free lesson plan from eurekami.com/lesson-plan-builder

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Weathering, erosion or deposition?

Name

Date

Score/ 8

  1. Question 1

    Which process is this: pebbles settling at the bottom of a lake?

    • A. weathering (rock breaks down in place)
    • B. erosion (pieces are carried away)
    • C. deposition (pieces are dropped)

  2. Question 2

    A river is fast in the mountains and slow near the sea. Where will it drop most of its mud?

    • A. it never drops mud
    • B. near the sea, where it slows down
    • C. in the mountains, where it is fast
    • D. in the clouds

  3. Question 3

    Three of these are examples of erosion. Which one is NOT?

    • A. sand piling up into a dune
    • B. wind blowing soil off a dry field
    • C. a glacier scraping rocks along
    • D. waves dragging pebbles off a beach

  4. Question 4

    Three of these are examples of deposition. Which one is NOT?

    • A. a river dropping mud at its mouth to make a delta
    • B. sand piling up into a dune
    • C. acid rain dissolving a limestone statue
    • D. pebbles settling at the bottom of a lake

  5. Question 5

    Which process is this: sand piling up into a dune?

    • A. weathering (rock breaks down in place)
    • B. erosion (pieces are carried away)
    • C. deposition (pieces are dropped)

  6. Question 6

    Lichen and moss growing on a gravestone slowly roughen its surface. Which process is this?

    • A. weathering
    • B. deposition
    • C. melting
    • D. erosion

  7. Question 7

    Which process is this: water freezing in a crack and splitting a rock?

    • A. weathering (rock breaks down in place)
    • B. erosion (pieces are carried away)
    • C. deposition (pieces are dropped)

  8. Question 8

    Which order shows how a beach can form from a cliff?

    • A. weathering → erosion → deposition
    • B. deposition → weathering → erosion
    • C. erosion → deposition → weathering
    • D. deposition → erosion → weathering

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Answer key: Weathering, erosion or deposition?

  1. 1. C. deposition (pieces are dropped)

  2. 2. B. near the sea, where it slows down

  3. 3. A. sand piling up into a dune

  4. 4. C. acid rain dissolving a limestone statue

  5. 5. C. deposition (pieces are dropped)

  6. 6. A. weathering

  7. 7. A. weathering (rock breaks down in place)

  8. 8. A. weathering → erosion → deposition