2026–27 · Backup lesson · Winter 2027
Track Water Changes During Everyday Work
Adult extension of: States of Matter
Unscheduled alternative · available resource
Compare ice, liquid water, and evidence of water changing between liquid and gas. Use careful labels to explain condensation and evaporation in garden containers without calling visible mist or droplets a gas.
Curriculum skill focus: Classification, temperature awareness, sequencing, physical science
01 · Learning
Objectives
- Distinguish the observable properties of solid ice and liquid water.
- Describe water vapor as an invisible gas.
- Explain a state change using an observed example and a stated limitation.
02 · Preparation
Materials
Ice in a closed clear container; sealed room-temperature water container; cold sealed bottle wiped dry at the start; tray; small measured water sample in a shallow dish; state and process cards; timer; towels; dated evaporation photos if needed.
03 · Practice
Adult project
- 1
Inspect ice and liquid water in clear containers. Describe shape and flow, using a gentle tilt of a securely closed water container if useful, and choose handling, labeling, or observation roles.
- 2
Place the ice sample at room temperature and record its appearance. Predict melting, then observe at intervals while keeping the container closed so liquid appearing inside can be connected to the sample.
- 3
Wipe the outside of a cold sealed bottle dry and place it beside a dry room-temperature bottle. Watch for outside droplets and discuss where that water could come from, rather than assuming the sealed bottle is leaking.
- 4
Set a shallow measured water sample aside for an evaporation check and record the time. If little changes during the session, use clearly dated before-and-after evidence or plan a later check; do not call missing water instantly proven evaporation without considering spills.
- 5
Arrange solid, liquid, and gas cards with melting, evaporation, and condensation arrows. Explain that visible mist consists of tiny droplets and water vapor is invisible, so no visible cloud is needed for evaporation.
- 6
Apply the reference to a damp greenhouse cover, a cold drink bottle, or drying a watering tray. Record one observed change, one explanation, and any later observation still needed, then clean and dry the station.
Evidence & interpretation
What the investigation shows
Water can exist as solid, liquid, and gas, with phase changes depending on temperature and pressure. Evaporation occurs from liquid surfaces below boiling; condensation forms liquid when water vapor cools sufficiently, and water vapor is not visible.
Practical connection
Why this work matters
State changes help explain wet greenhouse covers, drying surfaces, frozen water, and condensation around stored supplies.
Participation by choice
Individual access options
- Use securely closed containers and a partner-controlled tilt rather than direct contact with water or ice.
- Compare high-contrast photos, listen to descriptions, or arrange tactile state-change arrows.
- Choose a dry labeling role, decline temperature contact, and request a pause or leave the wet station whenever preferred.
Review & transfer
Reflect on the work
- Which changes did you actually observe during the session?
- Why are the droplets outside a cold bottle liquid rather than water vapor?