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Science lesson plan · 5th grade (Year 6 in England) · 30 minutes

The particle model

States of matter

CCSS NGSS.5-PS1-1CCSS NGSS.MS-PS1-4England: KS3 Chemistry: The particulate nature of matterEngland: KS3 Physics: MatterEngland: KS4 Combined Science: Particle model of matter

Objective and success criteria

Students will: The particle model.

  • 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: Solids, liquids and gases

Leads to: Density; Melting and boiling points; Evidence that matter is made of particles too small to see

Materials: Ice, water and a kettle (teacher demo), Particle diagrams, Mini whiteboards, A diagram or short video clip of the idea, Printed student sheet (below).

Warm-up · 4 min

  • Quick retrieval from earlier learning (Solids, liquids and gases). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. Is a coin a solid, a liquid or a gas? (solid / liquid / gas) → solidPrompt: Does it keep its shape, flow, or spread out to fill a space?
  2. You pour juice from a jug into a glass. What happens to its shape and volume? (Neither changes / Both change / The volume changes but the shape stays the same / The shape changes but the volume stays the same) → The shape changes but the volume stays the samePrompt: Did any juice disappear?
  3. Is rain a solid, a liquid or a gas? (solid / liquid / gas) → liquidPrompt: Does it keep its shape, flow, or spread out to fill a space?

Hook · 3 min

  • Show an ice cube melting and a kettle steaming and ask what is the same and what is different.
  • Share the objective: The particle model. Read the success criteria together.

I do: model it · 7 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: Which state is described: particles packed in a regular pattern?
  • Step 1: In a solid, particles are packed closely in a regular pattern and vibrate in place.
  • Step 2: So the answer is: solid
  • Answer: solid
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 6 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 state is described: particles touching but able to slide past each other? (solid / liquid / gas) → liquidPrompt: How close are the particles, and how do they move?
  2. What happens to particles when a substance is heated? (They stop moving / They melt / They get bigger / They move faster) → They move fasterPrompt: Heating gives particles more energy.

You do: independent practice · 7 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 6 questions are on the student sheet below, with answers in the key.

Exit ticket · 3 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. The particle model: which statement is NOT true? (The particles in ice are a different substance from the particles in water. / Particles in a solid still vibrate. / All matter is made of tiny particles. / There is empty space between gas particles.) → The particles in ice are a different substance from the particles in water.Prompt: Do particles themselves change size?
  2. What happens to particles when a substance is heated? (They stop moving / They get bigger / They melt / They move faster) → They move fasterPrompt: Heating gives particles more energy.

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: Solids, liquids and gases.
  • Use concrete materials: ice, water and a kettle (teacher demo).
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Move on to: Density; Melting and boiling points; Evidence that matter is made of particles too small to see.
  • 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-5.

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

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The particle model

Name

Date

Score/ 6

  1. Question 1

    Why can't solids flow?

    • A. Their particles move very fast
    • B. Their particles are far apart
    • C. Their particles are held in fixed positions
    • D. Their particles do not exist

  2. Question 2

    Which state is described: particles touching but able to slide past each other?

    • A. solid
    • B. liquid
    • C. gas

  3. Question 3

    The particle model: which statement is NOT true?

    • A. Particles in a gas are much further apart than in a liquid.
    • B. Particles in a solid do not move at all.
    • C. All matter is made of tiny particles.
    • D. There is empty space between gas particles.

  4. Question 4

    What causes gas pressure inside a balloon?

    • A. The balloon's colour
    • B. Particles staying still
    • C. Gas particles colliding with the inside of the balloon
    • D. The rubber pulling inwards

  5. Question 5

    Which state is described: particles close together in a random arrangement?

    • A. solid
    • B. liquid
    • C. gas

  6. Question 6

    Which state is described: particles packed in a regular pattern?

    • A. solid
    • B. liquid
    • C. gas

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Answer key: The particle model

  1. 1. C. Their particles are held in fixed positions

  2. 2. B. liquid

  3. 3. B. Particles in a solid do not move at all.

  4. 4. C. Gas particles colliding with the inside of the balloon

  5. 5. B. liquid

  6. 6. A. solid