Moon Phases Exploration

Overview

This 60-minute lesson is the third in a six-lesson unit titled Exploring Earth and Space. In this session, Year 8 students will deepen their understanding of the lunar cycle by investigating the phases of the Moon. Through an engaging hands-on activity, students will create accurate paper models to visually represent the Moon’s phases and their sequential changes. This lesson aligns with the National Curriculum for England's Science Programme of Study for KS3, specifically relating to Earth and Space.

National Curriculum Links

Programme of Study: Science - KS3

Unit: Earth and Space
Relevant Learning Objective:
- Describe the movement of the Earth, and other planets, relative to the Sun in the solar system
- Describe the movement of the Moon relative to the Earth
- Describe the Sun, Earth and Moon as approximately spherical bodies
- Use the idea of the Earth's rotation to explain day and night and the apparent movement of the Sun across the sky

Key Competencies:

Working scientifically — using models and simulations to explain scientific phenomena
Understanding and explaining cyclical changes in Earth and space contexts

Lesson Objectives

By the end of this lesson, students will:

Identify and name the eight principal phases of the Moon correctly.
Describe the Moon’s orbit around the Earth and how it leads to the lunar phases.
Create a physical, accurate model representing the lunar phases using paper spheres and light sources.
Explain why the phases of the Moon occur based on the position of the Sun, Earth, and Moon.

Curriculum Links in Detail

KS3 Science: Earth and Space Strand
- Pupils should be taught to describe the movement of the Earth, and other planets, relative to the Sun in the solar system; describe the movement of the Moon relative to the Earth; and describe the Sun, Earth and Moon as approximately spherical bodies.

Resources

Whiteboard and marker pens
Styrofoam balls or paper mache spheres (1 per student) to represent the Moon
Torches or desk lamps (to represent the Sun)
Black card or paper to darken areas of models if needed
Scissors, glue, coloured paper, pencils, and blu-tack
Large diagram/chart of lunar phases (labelled)
Worksheet: Lunar Phases Sequencing and Explanation

Lesson Structure

1. Introduction & Starter (10 minutes)

Begin with a quick recall quiz using Q&A: “What do you already know about the Moon and its phases?” Write brief bullet points on the board.
Show a time-lapse video or animation (teacher-led visual) demonstrating the Moon's orbit and phases — spotlight on waxing and waning.
Introduce the eight main phases: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent.

Teacher Tip: Use this time to reinforce vocabulary including ‘orbit’, ‘rotation’, ‘waxing’, and ‘waning’.

2. Main Activity: Making the Moon Phase Model (35 minutes)

Step 1: Demonstration (5 minutes)

Using a torch (Sun), a student (Earth), and a styrofoam ball (Moon), model the Moon orbiting the Earth while rotating on its own axis.
Show how sunlight hits different parts of the Moon, causing the phases seen from Earth.

Step 2: Student Model Creation (25 minutes)

Each student receives a styrofoam/paper sphere (Moon) and coloured papers.
Students mark and shade their spheres to represent the correct illumination for each Lunar phase, sticking on shaded or illuminated sections accordingly.
Students attach their labelled Moon phases in sequence around a paper Earth (drawn on card) to visualise the lunar cycle.
Encourage students to position their Moon models around the ‘Earth’ and shine the torch to check accuracy.

3. Group Discussion & Explanation (10 minutes)

Students each explain their models to the group, describing how and why the lighted parts change.
Teacher facilitates, corrects misconceptions and deepens understanding by linking phases to relative positions of the Sun, Earth, and Moon.
Use questioning to embed conceptual understanding: “Why do we see a full Moon when the Moon is opposite the Sun?”

4. Assessment & Plenary (5 minutes)

Distribute a short worksheet where students sequence lunar phases from new Moon back to new Moon and write a brief explanation of the cause of the phases.
Students peer-mark in pairs using an answer key provided by the teacher.
Conclude with a ‘Moon fact’ challenge question for reflection.

Extension Ideas / Homework

Research and prepare a short presentation on the cultural significance of the Moon phases in different countries.
Observe and record the Moon’s phase over the next week and journal the changes, linking back to today’s model.

Differentiation

Support: Provide step-by-step visual instructions for model creation; pair students with mixed abilities.
Challenge: Encourage applying the model to explain lunar eclipses in a related mini-discussion or quick research task.

Cross-Curricular Links

Maths: Sequencing and angles — understanding the orbit and rotation as a circular movement.
Art: Creative design of the Moon phases model, shading, and assembly.

Teacher Notes

Arrange the classroom so each student has space to move around during the model demonstration.
The hands-on element develops kinaesthetic learning and aids long-term retention.
This lesson builds important conceptual foundations for upcoming lessons on eclipses and the solar system.

Thank you for inspiring curiosity about our closest celestial neighbour!

Teaching Instructions