Phases of the Moon

Active learning helps students grasp the phases of the Moon by moving beyond abstract diagrams to hands-on experiences that reveal the Earth-Sun-Moon relationship. These activities make the invisible mechanics of lunar cycles concrete and memorable.

• Year 7
• Science
• 3 activities
• 30 min–60 min

Learning Objectives

1. Explain the cause of the Moon's apparent shape changes throughout its monthly cycle.
2. Construct a physical or digital model that accurately represents the relative positions of the Earth, Moon, and Sun during key lunar phases.
3. Predict the appearance of the Moon for a future date, given its current phase and the direction of its orbit.
4. Compare and contrast the appearance of the New Moon, First Quarter, Full Moon, and Last Quarter phases.
5. Identify the specific position of the Moon in its orbit relative to the Earth and Sun for each of the eight major lunar phases.

Formal Debate

⏱ 45 min·Whole Class

Formal Debate: Is the Moon Worth It?

Divide the class into two teams. One team argues that we should spend billions on lunar exploration for scientific and inspirational reasons; the other argues the money should be spent on Earth's environmental issues. Students must use evidence to support their points.

Prepare & details

Explain why the Moon appears to change shape over the course of a month.

Facilitation Tip: During the Structured Debate, assign roles clearly and provide a timer for each speaker to keep the discussion focused on evidence, not opinion.

Setup: Two teams facing each other, audience seating for the rest

Materials: Debate proposition card, Research brief for each side, Judging rubric for audience, Timer

• Analyze
• Evaluate
• Create
• Self-Management
• Decision-Making

Inquiry Circle

⏱ 60 min·Small Groups

Inquiry Circle: Designing a Moon Base

Groups are given a list of lunar challenges (no air, extreme temperatures, radiation, low gravity). They must design a simple base that addresses these needs using available resources (like lunar soil or 'regolith') and present their blueprint.

Prepare & details

Construct a model demonstrating the different phases of the Moon.

Facilitation Tip: For the Moon Base design, provide graph paper and a scale (e.g., 1 cm = 1 km) to ensure realistic planning.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Gallery Walk

⏱ 30 min·Whole Class

Gallery Walk: Australia in Space

Students create 'museum plaques' about different aspects of Australia's space history (e.g., The Dish at Parkes, the Australian Space Agency, or Indigenous astronomical knowledge). They display these and use a worksheet to find key facts from their peers' work.

Prepare & details

Predict the next phase of the Moon given its current appearance.

Facilitation Tip: During the Gallery Walk, assign small groups to create a 2-minute summary of one Australia in Space display to share with peers.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Teaching This Topic

Teaching lunar phases works best when students first observe the Moon over time to connect personal experience with the model. Avoid starting with the names of phases—instead, let students describe what they see and build the terminology gradually. Research shows that kinesthetic activities, like modeling with flashlights and balls, improve spatial reasoning about celestial movements.

What to Expect

Students will confidently explain the phases of the Moon using evidence, model the Earth-Moon-Sun system through discussion and design, and apply their understanding to real-world contexts like space exploration.

Watch Out for These Misconceptions

Common Misconception

During the Structured Debate, watch for students who claim the Moon landings were faked without evidence.

What to Teach Instead

Use the debate to introduce the activity by showing students NASA’s high-resolution images of Apollo landing sites taken by the Lunar Reconnaissance Orbiter. Have them compare these to the terrain described in astronaut reports and moon rock samples.

Common Misconception

During the Collaborative Investigation, watch for students who believe the Moon is hollow or made of cheese.

What to Teach Instead

Provide seismic data from Apollo missions and ask students to interpret the graphs showing Moon quakes. Guide them to identify layers (crust, mantle, core) and compare them to Earth’s structure using a table you provide.

Assessment Ideas

Quick Check

After students complete the Gallery Walk, give them a worksheet with images of the Moon in different phases. Ask them to label each phase and write one sentence explaining why it appears that way, using evidence from the displays.

Discussion Prompt

During the Structured Debate, listen for students to explain how the Earth’s appearance would change from the Moon’s surface as lunar phases shift. Use their responses to assess their understanding of the Earth-Moon-Sun alignment.

Exit Ticket

After the Moon Base design activity, have students draw the Moon’s phase from a specific Earth-Moon-Sun alignment on their exit ticket, label it, and predict its phase one week later based on their model.

Extensions & Scaffolding

• Challenge: Ask students to research how lunar phases affect tides and present their findings to the class.
• Scaffolding: Provide a word bank with terms like waxing, gibbous, and umbra to support labeling activities.
• Deeper exploration: Have students use planetarium software to simulate Moon phases from different latitudes.

Key Vocabulary

Lunar Phase	The different ways the Moon appears from Earth over about a month, caused by the changing angles at which we see its illuminated surface as it orbits Earth.
Orbit	The curved path of a celestial object, like the Moon, around a star, planet, or moon, typically due to gravity.
Illumination	The state of being lit up; in the context of the Moon, it refers to the portion of its surface that is lit by the Sun.
Crescent	A phase of the Moon where only a small sliver, less than half, of its illuminated surface is visible from Earth.
Gibbous	A phase of the Moon where more than half, but not all, of its illuminated surface is visible from Earth.