Nature’s Building Blocks

Overview

This is lesson 8 of 9 in Discovering Materials Around Us. Students use colourful building blocks as a simple model to explore the idea that materials are made from tiny parts called atoms, and that atoms can join to make molecules. The focus is on observing, representing and discussing models rather than learning formal scientific classification.

Learning intentions

Students will:

• learn that atoms are tiny parts that make up materials
• use blocks to represent atoms and joined groups of atoms
• build and compare simple models of atoms and molecules
• represent their observations in a provided template and identify patterns with guidance
• use careful science talk to describe what they notice

Success criteria

• I can explain that an atom is a very tiny part of a material.
• I can use one block to represent an atom.
• I can join blocks to make a simple molecule model.
• I can draw or record what I built and describe one pattern I noticed.

Curriculum links

• Science — representing observations in provided templates and identifying patterns with guidance.
• Science — sorting and linking images or models of materials and familiar objects.
• Science — identifying patterns in the uses and features of everyday materials.

Lesson structure (45 minutes)

1. 0–5 min · Connect to prior learning. Teacher displays familiar objects from the unit, such as a wooden pencil, plastic lid and metal spoon, and opens the hook and object images. Ask, “What are these objects made of? What might be hiding inside the material?” Students turn and talk, then share observations about materials they have previously sorted or described.

2. 5–12 min · Introduce the model. Teacher uses the tiny-parts teaching slides to explain that scientists use models to help them think about things too small to see. Show one block as an atom and explain that atoms are extremely tiny parts of all materials; clarify that the block is not a real atom, but a model. Students repeat and act out the words “tiny part”, “atom”, “join” and “molecule” with simple gestures.

3. 12–17 min · Teacher demonstration. Teacher joins two differently coloured blocks and explains that a molecule can be represented as atoms joined together. Build a second model using three blocks, thinking aloud: “I can count three blocks. I can see two colours. The blocks are joined.” Emphasise that models may be different colours and shapes, and that scientists use models to show ideas. Students predict what they might notice when they build their own structures.

4. 17–32 min · Partner building investigation. Organise 25 students into pairs, with one group of three, and provide tubs of large, safe building blocks. Open the building challenge and partner instructions. Students build: one single-block atom model; a two-block molecule; and a three- or four-block molecule. Partners take turns as Builder and Observer, then swap roles. The Observer describes the model using prompts such as “I notice…”, “I can count…” and “The blocks are…”. Teacher circulates, asks “How many atoms are in your model?” and photographs or sketches interesting examples for the plenary.

5. 32–40 min · Record and identify patterns. Distribute the atom and molecule observation sheet and return to the recording and pattern prompts. Students draw one atom model and one molecule model, then complete or dictate sentences: “My atom model has ___ block” and “My molecule model has ___ joined blocks.” With guidance, pairs identify a pattern, such as “A molecule model has joined parts” or “We can make different models by changing the number or colour of blocks.” Adults may scribe student responses.

6. 40–45 min · Share and assess. Invite three pairs to show their models and explain what each block represents. Use the plenary questions: “What does one block represent?”, “What makes our molecule model different from an atom model?” and “Why do scientists use models?” Students complete the final response on the reflection box by drawing or explaining one thing they learned.

Resources

• the complete introduction, building and plenary slide deck
• the atom and molecule observation sheet
• Large, colourful interlocking building blocks
• Small tubs or trays for partner materials
• Familiar classroom objects made from different materials
• Document camera or visualiser
• Teacher clipboard and pencils
• Optional tablet or camera for recording models

Assessment

• Listen during partner talk for students who understand that one block is a model of one atom and joined blocks represent a molecule.
• Observe students’ constructions and worksheet drawings, checking whether they can represent an atom and a joined group of atoms.
• Use the final reflection and plenary responses to identify students needing further support before the final unit lesson.

Differentiation

• Support understanding with real objects, gestures, repeated phrases, colour-coded blocks and the sentence starters “An atom is…” and “My model shows…”.
• Provide a reduced building task of one block and two joined blocks for students who need fewer choices; allow drawing, pointing or oral recording instead of writing.
• Pair students carefully and assign clear roles. Use large blocks and a quiet building space for students with fine-motor, sensory or attention needs.
• Extend confident students by asking them to build two different molecule models, compare them and explain which features stayed the same or changed.
• For EAL/D learners, use pictures alongside the words atom, molecule, tiny, part and join, and accept home-language discussion before sharing in English.