Light and Matter

Overview

Today students investigate how light behaves through absorption, reflection, refraction and scattering, then use laptops and short video creation to demonstrate these concepts. The lesson builds towards investigating safely and ethically, collecting valid observations, and communicating scientific explanations with evidence.

Learning intentions

Students will…

• investigate the effects of materials on light (absorption, reflection, refraction, scattering)
• identify patterns in observations and link them to the features of light behaviour
• follow a planned, safe investigation procedure to gather reliable data
• create and film a short educational video using scientific language
• reflect on evidence and improve their scientific explanation

Success criteria

Students can…

• describe what happens to a light beam and explain why using the terms absorption, reflection, refraction and scattering
• record observations clearly (what changed, what stayed the same) and cite evidence from the investigation
• communicate a scientifically accurate 30–60 second video explanation with correct terminology
• reflect on one strength and one improvement linked to their evidence

Curriculum links

• SC5-WS-04: follow a planned procedure to undertake safe, ethical, valid and reliable investigations
• SC5-WAM-01: describe features and applications of different forms of waves, focusing on how light behaves
• SC5-WS-05: select and use tools to process and represent data (tables/notes and simple graphs if needed)
• SC5-WS-08: communicate a scientific argument with evidence using scientific language in video form

Lesson structure (60 minutes)

1. 0–5 min · Hook with video prompts. Teacher displays the light-behaviour hook and investigation overview slides showing four quick stills (dark paper, mirror, “bent” straw, foggy beam) and asks: “Which of these behaviours is most important for seeing clearly—absorption, reflection, refraction or scattering? Why?” Students quick-write a claim.

2. 5–12 min · Set up investigation & safety. Teacher introduces the day’s station tasks using the light-behaviour hook and investigation overview slides (safe laser/LED use, eye safety, no aiming at faces, tidy benches). Students form groups of 4 and receive equipment, then restate the procedure steps aloud: purpose, variables, method, recording.

3. 12–25 min · Station investigations (group work). Teacher rotates through groups, pausing at least once per station to check that observations are valid and reliable, using the light-behaviour hook and investigation overview slides instructions.

• Station A (absorption): shine a torch/LED at different surfaces (black paper, white paper, foil). Students record intensity/brightness changes.
• Station B (reflection): shine at mirror/foil/flat metal and observe angle changes; measure using marked tape if available.
• Station C (refraction): straw in water or clear block; observe bending and where the “break” in the beam appears.
• Station D (scattering): torch through a translucent material (diffuser) or visible “beam” using fine water mist alternatives if allowed; observe spread. Students complete a shared group observation table (what material, what you saw, evidence statements). Teacher prompts: “What evidence would convince someone who disagrees?”

4. 25–31 min · Video research model (YouTube as a source). Teacher plays a short, pre-selected clip from YouTube (previously checked) about one concept (e.g., refraction), showing how to judge reliability (clear explanation, repeated demonstrations, consistent terminology). Use the light-behaviour hook and investigation overview slides to model note-taking: “Claim + Evidence + Key term.”

5. 31–44 min · Plan the student video (group scripting). Teacher returns groups to laptops and distributes/points to the light video script and evidence worksheet. Students choose ONE behaviour (or a two-part focus if time) and plan a 30–60 second video: title, hook sentence, demonstration from their station, explanation using scientific terms, and one final “why it matters” application prompt (e.g., sunglasses, mirrors, lenses, mist in headlights). Teacher circulates for terminology accuracy and evidence alignment.

6. 44–55 min · Create and film videos (laptops). Teacher provides filming guidance using the light-behaviour hook and investigation overview slides: camera steady, include a close-up of the light source effect, speak clearly, show at least one evidence cue from the station notes. Students record, then do a quick reread check against their script. Teacher takes brief formative notes on accuracy and use of evidence.

7. 55–60 min · Share-out and reflection. Whole-class gallery: each group shares a 10–20 second “best evidence moment” and one key statement. Students complete a 2-question reflection on the light video script and evidence worksheet: (1) “Which observation is strongest evidence?” (2) “What would you improve next time to make it more scientifically convincing?” Teacher closes by linking back to safe investigation and evidence-based communication.

Resources

• the light-behaviour hook and investigation overview slides
• the light video script and evidence worksheet
• Laptops with simple video recording/editing capability
• Access to YouTube for short pre-selected, teacher-verified clips (no hyperlinks in plan)
• Torch/LED lights or desk lamps for stations (eye-safety rules clearly stated)
• Materials for stations: black/white paper, foil, mirror/metal sheet, clear plastic block or water container, straw, translucent diffuser, optional safe beam diffuser materials
• Benches/tape measures/markers for angle or placement consistency
• Group observation table templates (included on worksheet-1 or printed strips)
• Timer for station rotation

Assessment

• Formative checks during stations for valid procedures and quality of recorded observations (teacher checklist notes)
• Review of worksheet-1 evidence statements before filming (accuracy of terms and link to observations)
• Video quality snapshot: scientific terminology, correct explanation, and use of evidence in the final 10–20 seconds

Differentiation

• Provide sentence starters on worksheet-1: “My evidence shows… because… therefore…”
• Support groups with a “term bank” (absorption, reflection, refraction, scattering) and a model paragraph in slides-1
• For students needing extension: require a simple application link (“where would this behaviour be useful/unsafe?”) and an optional suggestion to improve reliability (more trials, consistent distances)
• For EAL/SEN: allow roles (recorder, demonstrator, narrator), and permit audio-first recording before any editing