AC9S4U02: Identify sources of water and describe key processes in the water cycle, including movement of water through the sky, landscape and ocean; precipitation; evaporation; and condensation

Students identify water in oceans, rivers, lakes, soil, ice, groundwater and the atmosphere, then explain how solar energy and gravity drive continuous movement through the water cycle.

Learning routine: Observe → Model → Investigate → Record → Explain → Evaluate

Success looks like

• Identify water stores
• Explain key phase changes
• Connect Sun and gravity
• Interpret observations
• Trace multiple cycle pathways

evaporation

liquid water changing to water vapour

condensation

water vapour cooling into liquid droplets

precipitation

water falling from clouds

The content description and elaborations below show the curriculum ideas taught in this unit. Items marked as teaching context support lesson planning.

• Content description: identify sources of water and describe key processes in the water cycle, including movement of water through the sky, landscape and ocean; precipitation; evaporation; and condensation
• E1: identifying everyday examples of precipitation (rain or snow), evaporation (wet washing or paint drying) and condensation of water (water droplets on a cold water bottle)
• E2: identifying local water sources and exploring how they change over time, such as rain puddles that evaporate or a local creek that flows faster after rain
• E3: exploring where tap water comes from and predicting what happens to water that goes down the drain
• E4: exploring a game or simulation of the water cycle, identifying key processes and creating their own representation of the water cycle
• E5: recognising that clouds are tiny water droplets suspended in air, observing a ‘cloud in a bottle’ demonstrated by a teacher and discussing what conditions are needed for clouds to form and for rain or snow to fall
• E6: exploring First Nations Australians’ connections with and valuing of water and water resource management (teaching context)
• E7: recognising First Nations Australians’ knowledges and understandings of evaporation and how the effect of evaporation can be reduced to conserve water, such as by covering surfaces (teaching context)
• E8: considering why we are encouraged to save and recycle water, and actions people can take to reduce water consumption and waste

Observe a puddle from a safe dry place on two days. Sketch its boundary and record rain, warmth and wind. A smaller puddle may show evaporation, but also consider water soaking into the ground. A creek may rise after rain because rain and runoff add water.

Investigate your local water provider with an adult: does tap water begin in a reservoir, groundwater bore, rainwater tank or another source? Treatment and checks make supplied drinking water suitable to drink; clear-looking water is not proof of safety.

Worked example: A town map shows reservoir → treatment → pipes → tap. In a town with separate sewer and stormwater pipes, water from a shower goes through a sewer to wastewater treatment; street runoff goes into stormwater drains. These are different pathways. Trace your own local system rather than assuming every place is the same.

Check: Is a tap the original natural source? Answer: No. It is a delivery point; trace its supply upstream.

Make station cards for ocean, river, soil, groundwater and cloud droplets. Move a counter between possible stores, naming each process. Allow more than one route and different waiting times. Then draw your own labelled representation. A neat circle is only a simplified model, not a route every drop must follow.

Teacher demonstration: Use a school-approved cloud-in-a-bottle method and follow its equipment and safety instructions. Students observe rather than handle hot water, pressure equipment or any ignition source. Record the appearance of a mist after moist air cools. Cooling can cause invisible water vapour to condense into tiny liquid droplets suspended in air.

Real clouds may contain liquid droplets, ice crystals or both. Droplets that join and grow can fall as rain; snow involves ice crystals in cold clouds. Condensation means gas changing to liquid, not gas changing directly to ice.

Model limit: Water drops on a bag or bottle wall are on a surface. Cloud droplets are suspended in air. The model helps show changes but is not a miniature copy of every cloud process.

First Nations Australians have continuing connections with water and responsibilities for Country/Place. ACARA explains that water management considers connected waterways, living things and people downstream. Changing water flow in one place can affect another. Use a locally approved account to investigate whose Country the waterway is on, what the account says and how water is cared for; do not invent or generalise cultural stories.

ACARA documents Baiyungu People covering water held in rock cavities with limestone lids. A cover reduces exposure of the water surface and can slow evaporation. This is one specific example of knowledge used to conserve water, not a claim that all communities use the same practice.

Worked comparison: Matching containers begin with 100 mL in the same place. The open one finishes with 76 mL and the covered one with 96 mL. Losses are 24 mL and 4 mL. The cover reduced loss in this test; it did not prove that evaporation always stops. Keep container, starting amount, location and duration alike when testing a cover.

The water cycle continues, but safe local water is limited by rainfall, storage, treatment and delivery. Repair leaks, turn off taps when unnecessary and use water efficiently. Water recycled and treated for garden irrigation or toilet flushing can reduce use of drinking supplies. Do not assume water approved for one use is safe for every use.

ACARA: connections with and valuing water · ACARA: conserving water through evaporation knowledge · Sydney Water: water recycling

1. Name three water stores. Oceans, rivers and groundwater are examples; also accept lakes, ice, soil water and water in the atmosphere. Groundwater may be fresh or salty.
2. How do evaporation and condensation differ? Evaporation changes liquid water into invisible vapour. Condensation changes vapour into liquid droplets.
3. What drives runoff? Gravity moves water downhill over land. The Sun supplies energy for evaporation.
4. Why can we see clouds? They contain tiny liquid droplets or ice crystals, rather than only invisible vapour.
5. Trace ocean water to groundwater. One possible route is evaporation → condensation into cloud droplets → precipitation on land → infiltration into the ground.

1. A cold sealed can becomes wet outside. Explain the source of the drops. Water vapour in the surrounding air cools and condenses on the can. If a learner says it leaked, compare dry cold and room-temperature sealed cans.
2. A diagram labels liquid water changing to vapour as condensation. Correct it. Replace the label with evaporation; condensation is the reverse change.
3. A creek rises after rain. Does this show all the rain ran off? No. Some rain may collect, infiltrate or evaporate. Ask the learner to draw two possible pathways.
4. Why reduce water waste if water cycles? Usable local supplies are not unlimited; water needs collection, treatment and delivery. Review the difference between water existing and safe water being available.

Prerequisites: recognise liquid water and ice, describe wet/dry changes and read simple arrows. Must teach: sources and movement through sky, land and ocean; evaporation, condensation and precipitation; local supply and care for water.

Support: match pictures of wet cloth, cold can and rain to process words; explain orally. Core: draw and explain two connected water pathways. Extend: compare measured evaporation losses and explain a model limitation within this topic.

Use Sun energy, gravity, runoff and infiltration to support explanations. Do not require molecular kinetic theory, vapour-pressure calculations or formal cloud microphysics as Year 4 content.

1. Draw a store in the sky, one on land and the ocean, with labelled arrows linking them.
2. Explain a real evaporation or condensation observation and identify where the water went or came from.
3. Suggest one way to conserve water and explain why it helps.

Evidence to inspect: correctly directed arrows and named processes; liquid/vapour distinction; a conservation reason connected to evaporation or useful local supply. Ask the student to explain the drawing. A finished page alone is not evidence of understanding. Reteach the specific process that has been reversed before retrying.

Use reliable, community-approved sources and identify the specific Nation, People or community where the source does. Do not present diverse First Nations knowledges as one generic tradition. Follow local cultural and intellectual property protocols before reproducing cultural material or inviting community participation.

Core idea: Students identify water in oceans, rivers, lakes, soil, ice, groundwater and the atmosphere, then explain how solar energy and gravity drive continuous movement through the water cycle.

Remember

• Identify water stores
• Explain key phase changes
• Connect Sun and gravity
• Interpret observations
• Trace multiple cycle pathways

Use the Important questions and answers section for worked responses and the Exit ticket to inspect understanding.

Read the topic guide and use the teacher slide for instruction. Students can then use the worksheet for written work, open Practice for supported feedback, or take the Test when they are ready.

• Clouds are water vapour — Visible clouds contain tiny liquid droplets or ice crystals; water vapour is invisible.
• Evaporation only happens when boiling — Liquid water evaporates from its surface below boiling point.
• Droplets on a cold glass leak through — They form when water vapour in air condenses on the cool surface.
• The water cycle follows one fixed circle — Water can take many pathways and remain stored for different times.

This table gives closest-topic mapping for search and planning. The Australian Curriculum code is exact; overseas entries are broad equivalents because each jurisdiction structures outcomes differently.

Curriculum equivalents for Sources of water and describe key processes in the water...

Mapped skill: identify sources of water and describe key processes in the water cycle, including movement of water through the sky, landscape and ocean; precipitation; evaporation; and condensation

These references identify matching or closely related learning. Curriculum sequence, terminology and depth vary, so teachers should use the mapped skill and lesson difficulty to confirm suitability.

Australian Curriculum v9.0 is the canonical source for this SkillrHub lesson. Victoria and NSW entries name the closest published state codes or outcomes; international entries are planning references rather than claims of identical curricula.

• Australian Curriculum Version 9.0
• Victorian Curriculum F-10
• NSW Curriculum
• Common Core State Standards
• Next Generation Science Standards
• England National Curriculum
• New Zealand Curriculum
• NCERT textbooks

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• AC9S4U04: Examine the properties of natural and made materials including fibres, metals, glass and plastics and consider how these properties influence their use
• AC9S4H01: Examine how people use data to develop scientific explanations
• AC9S4H02: Consider how people use scientific explanations to meet a need or solve a problem
• AC9S4I01: Pose questions to explore observed patterns and relationships and make predictions based on observations
• AC9S4I02: Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment
• AC9S4I03: Follow procedures to make and record observations, including making formal measurements using familiar scaled instruments and using digital tools as appropriate