Chemistry of Everyday Life

Overview

In this 8th lesson of “The Story of Humanity,” students explore how everyday materials can change through simple, safe chemical interactions. Year 1 focuses on observable changes; Year 5 connects reactions to evidence, cause-and-effect, and scientific communication, then links findings to their documentaries.

Learning intentions

• Students will observe and describe changes in common materials when mixed safely.
• Students will use evidence from observations to explain what changed and what caused the change.
• Students will communicate results clearly for a real audience (documentary viewers).
• Students will connect chemical ideas to human everyday life and technology.

Success criteria

• I can describe what I see (color, texture, temperature, bubbles, new smell) using complete sentences.
• I can sort changes as “reversible/irreversible” based on what happens over time.
• I can record observations in a simple or structured table and cite evidence from my notes.
• I can share my findings (spoken or written) with an organized explanation.

Curriculum links

• Reading and writing: build understanding through informational texts and explain ideas clearly in writing/speaking.
• Writing: use evidence and specific details to inform/explain.
• Speaking and listening: present findings in an organized way using evidence.
• Science and engineering practices: observe, measure/record, model, and communicate results.

Lesson structure (240 minutes)

1. 0–15 minutes: Launch + safety talk (both years)

• Review lab rules: goggles on, only small amounts, teacher-led steps, and immediate cleanup.
• Ask: “What do we already know about how humans use materials safely?”

2. 15–45 minutes: Investigation stations (Year 1: teacher-guided) / (Year 5: student-led)

• Do 2 safe mixing experiences at each station (rotate every 10–12 minutes).
• Year 1 targets: “What do you notice?” and “Does it change again if we wait?”
• Year 5 targets: “What evidence shows a chemical change?” (bubbles, gas, heat, precipitate, color change).

3. 45–75 minutes: Observation recording sprint

• Year 1 completes a picture-and-sentence sheet: “First… Then… Now…”
• Year 5 completes a data sheet with columns for material, what was added, initial observations, final observations, and evidence.
• Teacher circulates with guided questions: “What changed? How do you know?”

4. 75–95 minutes: Mini-lesson—chemical vs physical changes

• Short whole-group discussion with examples from their mixtures.
• Year 1 uses a simple rule: “Did it make something new we can’t easily undo?”
• Year 5 uses a claim-evidence structure: “My claim is… because I observed…”

5. 95–120 minutes: Second round + test time

• Repeat one reaction using the same amounts and timing to check reliability.
• Year 1 focuses on consistency: “Is it the same as before?”
• Year 5 adds a “change over time” check (record at 1 minute and 5 minutes).

6. 120–150 minutes: Vocabulary-free reasoning and sorting

• Students sort results into two groups: reversible-looking vs not-reversible-looking.
• Year 1 uses sentence starters: “It looks like it changed in a way that stays.”
• Year 5 writes one paragraph: “This is likely a chemical change because…”

7. 150–210 minutes: Documentary connection—prepare share

• Year 1 creates a 3-step “Story of the Change” card (drawings + 2–3 sentences).
• Year 5 drafts a short script segment (5–8 sentences) including: what happened, evidence, and why it matters to everyday human life.
• Add a brief “human connection” note: how chemistry helps cooking, cleaning, medicines, or safety.

8. 210–240 minutes: Share, reflect, and clean up

• Pair-share: each student presents to the parent/peer listener using their notes.
• Exit reflection (quick): “One thing I learned about changes in matter is…”

Resources

• Safety goggles (for both students)
• Small clear cups, spoons/measuring spoons
• Paper towels, tray or bin for containment
• Observation sheets (Year 1 picture-sentence; Year 5 table + claim-evidence paragraph frame)
• Timer/clock
• Materials for safe reactions (teacher-selected and pre-tested):
• Baking soda + vinegar (observe fizzing/gas)
• Cornstarch + water (non-Newtonian change; optional for comparison)
• Food coloring + water (for color mixing and physical mixing comparison)
• Warm water vs cool water (simple temperature change comparison)
• Document supplies: crayons/markers (Year 1), notebook or printed frames (Year 5)
• Cleanup supplies: water, mild soap, designated waste plan

Assessment

• Formative: teacher notes during stations (accuracy of observations and clarity of explanations).
• Formative: collected recording sheets (Year 1 sentences; Year 5 data tables and claim-evidence paragraph).
• Summative for this lesson: each student delivers a brief explanation using evidence from their own experiment.

Differentiation

• Support for Year 1:
• Use minimal steps and teacher prompts; limit to one main reaction plus one comparison.
• Provide sentence stems and picture options on the worksheet.
• Extension for Year 5:
• Add a “variables” check (same amount, same timing, document any changes).
• Require two claims: one for chemical change evidence and one for what might be reversible.
• For diverse learners:
• Offer choice in communication mode (draw + tell, or write + read).
• Keep an example completed observation sheet visible.
• EAL/SEN strategies:
• Use consistent language frames and visuals for “First/Then/Now.”
• Read aloud the instructions and allow oral responses before writing.