Exploring Matter's Magic

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Overview

Subject: Science
Year Group: Year 4
Topic: States of Matter
Duration: 30 minutes
Class Size: 30 pupils
Curriculum Focus:
National Curriculum for Science — Year 4
Programme of Study:
States of Matter
Pupils should be taught to:

• Compare and group materials together, according to whether they are solids, liquids or gases
• Observe that some materials change state when they are heated or cooled, and measure or research the temperature at which this happens in degrees Celsius (°C)
• Identify the part played by evaporation and condensation in the water cycle and associate the rate of evaporation with temperature

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Learning Objectives

By the end of this session, pupils will be able to:

1. Identify and describe the properties of solids, liquids, and gases.
2. Categorise familiar items into correct states of matter.
3. Engage with a short, hands-on demonstration of a change of state.
4. Use scientific vocabulary accurately: particles, solid, liquid, gas, evaporation, condensation, melting, freezing.

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Resources Required

• Ice cubes in sealed food bags
• Hairdryer
• Transparent container with steam (e.g. from a kettle pre-filled) — teacher use only
• 3 labelled sorting trays: Solids, Liquids, Gases
• Laminated picture cards of everyday items (milk, oxygen, chocolate bar, perfume, sponge, balloon, rain, etc.)
• Particle pop circles (A3 diagrams showing particles in each state – included in session)
• Whiteboard/flipchart and pens
• Printed “State Detectives” mini-booklets per group
• Timer
• Stickers for plenary reward

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Lesson Breakdown

Starter: What's the Matter? (5 minutes)

Purpose: Spark curiosity and assess prior knowledge using an interactive question.

• Begin with a drama hook: "The Ministry of Matter has a problem! Items around the classroom are changing state – and we need Year 4 scientists to figure out what's going on!"
• Quick-fire interactive quiz — Teacher shows 3 mystery bag items (e.g. sponge, half-full water bottle, blown-up balloon). Pupils guess the state of each and explain their reasoning.
• Draw three columns on the whiteboard: Solids, Liquids, Gases. Begin adding predictions with pupil input.

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Main Activity 1: Particle Pop! (10 minutes)

Purpose: Introduce abstract ideas through concrete visualisation.

Activity: Whole-class movement and modelling

1. Explain how the particles in solids, liquids and gases act differently.
2. Bring out the three large "Particle Pop" mats (A3, laminated):
   • Solids: tightly packed dots
   • Liquids: slightly spread, sliding
   • Gases: scattered across the page
3. Assign three student volunteers to act each state, using their bodies to mimic particle movement. Rest of class mirrors motions from seats.
4. Teacher narrates a mini-story: “An ice cube is left on a sunny window ledge... what’s happening to the particles?”
5. Discuss key terminology as each state is modelled: “compress,” “flow,” “fill the container.” Add to “Science Word Wall”.

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Main Activity 2: State Detectives (10 minutes)

Purpose: Allow hands-on group classification and tangibly explore the concept.

Activity:

• Divide pupils into groups of five.
• Each group uses a “State Detectives” tri-fold board with picture cards (sugar, perfume, rain, steam, oil, chocolate, balloon).
• Pupils sort the images into correct tray: Solid | Liquid | Gas
• Once sorted, challenge them to identify which ones can change state. Mark with a sticker.
• Use provided mini-booklets to write 2–3 sentences explaining why they classified each item the way they did.

Teacher support: Circulate and ensure accurate use of keywords.

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Plenary: Ice to Steam (5 minutes)

Purpose: Observe a change of state and consolidate vocabulary.

Activity:

• Teacher-led safe demonstration — Holding the sealed ice in the bag, pupils observe as you apply the hairdryer to melt it.
• Then, show the steaming container (already warm) and observe water droplets forming on the lid.
• Discuss: What did we just see? What states were involved?
• Use a “Talk to Your Table” strategy: Each pupil shares one sentence using a key word from the wall (e.g., "The water evaporated.").

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Assessment for Learning (AfL)

• Ongoing verbal questioning during activities
• Observation of group sorting task
• Plenary responses using key vocabulary
• Mini-booklet writing samples

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Extension (for early finishers or home learning)

• Invite pupils to become "State Hunters" at home—bring in an example/photo/drawing of a change of state they observed (e.g. butter melting on toast).
• Challenge: Can they describe the particle behaviour?

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Differentiation

• SEND: Provide simplified sorting boards with visual cues (e.g., pourable, firm, floaty). Use coloured word banks for writing support.
• EAL: Include dual-language cards or illustrations representing concepts. Partner with a peer buddy for classification.
• Greater Depth: Challenge to reclassify “tricky” materials like jelly or shaving foam – open discussion on what makes classification challenging.

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Wow Factor!

• Integrating movement and drama with science helps embed more abstract ideas
• Realistic demonstration of melting and condensation linked to the water cycle
• Investigation areas named with flair: “State Lab”, “Evaporation Station”, “Condensation Corner”

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Reflection

To be completed post-lesson by the teacher:

• Were pupils able to use scientific vocabulary accurately?
• How confident were they in identifying and explaining states of matter?
• What would I do differently in the next delivery?

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Final Note

This lesson is rooted in the KS2 Science Programme of Study and appropriately scaffolded for Year 4 learners. By making the invisible world of particles tangible and fun, pupils leave not only with knowledge — but insight and curiosity.