Earth and Space
KS2SC-KS2-D012
Physics/astronomy domain covering the solar system, Earth's rotation, day and night, movement of Moon relative to Earth, and approximately spherical bodies. Year 5 only.
National Curriculum context
Earth and Space at upper KS2 provides pupils with an understanding of the solar system, Earth's movements and the phenomena associated with them — day and night, seasons, phases of the Moon. Pupils learn that the Earth, along with other planets, orbits the Sun, and that the Moon orbits the Earth, using models and research to understand the relative sizes, distances and movements of these bodies. The statutory curriculum requires pupils to explain day and night as the result of Earth rotating on its axis, and to understand how this differs from the annual orbit of the Earth around the Sun. This provides important foundations for astronomical and geographical concepts at KS3 and beyond.
3
Concepts
2
Clusters
2
Prerequisites
3
With difficulty levels
Lesson Clusters
Describe the solar system and the relative positions of planets
introduction CuratedThe solar system structure and the Moon's orbit as Earth's satellite are the spatial framework concepts for this domain. Co_teach_hints link C054 and C052 directly.
Explain day and night using a model of Earth's rotation
practice CuratedEarth's rotation and its cause of day and night is the key explanatory model of the domain; it requires the solar system structure from the introduction cluster and directly addresses the common misconception that the Sun moves around Earth.
Access and Inclusion
1 of 3 concepts have identified access barriers.
Barrier types in this domain
Recommended support strategies
Prerequisites
Concepts from other domains that pupils should know before this domain.
Concepts (3)
The Solar System
knowledge AI DirectSC-KS2-C052
Understanding that the Sun is a star at the centre of our solar system and that eight planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) orbit it. Heliocentric model replaced earlier geocentric model. History of scientific ideas including Ptolemy, Alhazen, Copernicus.
Teaching guidance
Create a scale model of the solar system using appropriately scaled spheres (or fruits) to show relative sizes, and use the school field or corridor to show relative distances (even scaled down, the distances are striking). Teach the order of the eight planets using a mnemonic (e.g., 'My Very Enthusiastic Mother Just Served Us Nachos'). Discuss the heliocentric model and its history — how Copernicus, Galileo and others challenged the geocentric model with evidence from observations. Use videos or planetarium software to visualise planetary orbits. Emphasise that the Sun is a star and that planets orbit it due to gravity.
Common misconceptions
Children commonly believe that the Sun orbits the Earth (geocentric model) because that matches everyday observation of the Sun 'moving' across the sky. Pupils often dramatically underestimate the distances between planets and overestimate the relative size of Earth compared to Jupiter or Saturn. Some children think stars and planets are the same thing — stars produce light, planets reflect it. Children may believe Pluto is still classified as a planet.
Difficulty levels
Knowing that the Sun is a star and that the Earth and other planets orbit (go around) the Sun.
Example task
Does the Sun go around the Earth, or does the Earth go around the Sun?
Model response: The Earth goes around the Sun. The Sun is a star in the centre and the Earth is a planet that orbits it.
Naming the eight planets in order from the Sun and understanding that the Sun is at the centre of our solar system (heliocentric model).
Example task
Name the eight planets in order from the Sun.
Model response: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. A memory aid is 'My Very Enthusiastic Mother Just Served Us Nachos'. Mercury is closest to the Sun and Neptune is the furthest.
Describing the solar system model including relative sizes and distances, and understanding that the heliocentric model replaced the geocentric model through evidence.
Example task
For hundreds of years, people believed the Sun went around the Earth. What evidence led Copernicus to propose the opposite?
Model response: The geocentric model (Earth at the centre) was the accepted view for over 1,000 years, based on Ptolemy's work. Copernicus studied the movement of planets and found that their apparent motion — including retrograde movement where planets seem to go backward — could be explained much more simply if all planets, including Earth, orbited the Sun. Later, Galileo's telescope observations supported this: he saw moons orbiting Jupiter (proving not everything orbits Earth) and phases of Venus (only explainable if Venus orbits the Sun). This shows how scientific ideas change when new evidence challenges old models.
Understanding the vast scale of the solar system and explaining why human perception makes the heliocentric model counterintuitive.
Example task
If you shrank the Sun to the size of a football, how far away would the Earth be and how big would it be? Why does the Sun appear to move across our sky if it is really the Earth that moves?
Model response: If the Sun were a football (22cm), the Earth would be a peppercorn (2mm) about 24 metres away — nearly the length of a swimming pool. Jupiter would be a cherry, 125 metres away. Neptune would be 770 metres away. Space is unimaginably vast. The Sun appears to move across our sky because we are standing on a spinning planet. It is like sitting on a merry-go-round — the landscape appears to move around you, but you are the one rotating. Our senses cannot detect Earth's rotation because everything on Earth rotates with us. This is why the geocentric model seemed so obvious for centuries — our everyday experience is exactly what you would expect if the Sun were moving. Only careful astronomical observations revealed the truth.
Delivery rationale
Science knowledge concept — factual content deliverable with visual representations and adaptive quizzing.
Access barriers (2)
Evolution and inheritance requires understanding change over geological timescales — millions of years — which is conceptually beyond direct experience. The concept that small variations accumulate into speciation is deeply abstract.
Evolution introduces specialised vocabulary: 'evolution', 'inheritance', 'adaptation', 'variation', 'natural selection', 'fossil record', 'species'. These are Tier 3 (subject-specific) words with precise scientific meanings.
Earth's Rotation and Day/Night
knowledge AI DirectSC-KS2-C053
Understanding that the Earth rotates on its axis once every 24 hours, causing day and night. The part of Earth facing the Sun experiences day; the opposite side experiences night. The Sun's apparent movement across the sky is explained by Earth's rotation, not the Sun moving.
Teaching guidance
Use a globe and a torch in a darkened room to model Earth's rotation and day/night. Mark the pupils' location on the globe and slowly rotate it to show how their location moves from day (facing the torch) to night (facing away). Emphasise that it is Earth rotating, not the Sun moving around Earth. Discuss time zones as evidence of Earth's rotation. Use the model to explain why the Sun appears to move across the sky during the day — we are rotating beneath a stationary Sun. Link to KS1 work on seasonal day length changes. Use slow-motion videos of sunrises and sunsets to reinforce that these are caused by Earth's rotation.
Common misconceptions
The most persistent misconception is that day and night are caused by the Sun going around the Earth. Some children think night occurs because the Moon or clouds block the Sun. Pupils may confuse Earth's daily rotation (causing day/night) with its yearly orbit around the Sun (causing seasons). Some children think that different countries have day and night at different times because the Sun travels to different places, rather than because Earth rotates.
Difficulty levels
Knowing that the Earth spins and this is what causes day and night.
Example task
Why does it get dark at night?
Model response: The Earth spins around once every day. The side facing the Sun has daytime (it is light). The side facing away from the Sun has night-time (it is dark). As the Earth keeps spinning, our part moves from day into night and back again.
Explaining that the Earth rotates on its axis once every 24 hours, and using a model (globe and torch) to demonstrate day and night.
Example task
Use a globe and a torch to show how day and night work. Mark where we live.
Model response: I shine the torch at the globe — this represents the Sun. The lit side is daytime and the dark side is night-time. I mark our position (UK) on the globe. When I slowly rotate the globe, our position moves from the light side into the dark side and back again. One full rotation takes 24 hours. When it is daytime for us, it is night-time for people on the opposite side of the Earth (like New Zealand).
Explaining how Earth's rotation causes the Sun to appear to move across the sky from east to west, and understanding time zones as evidence of Earth's rotation.
Example task
The Sun rises in the east and sets in the west. Does the Sun actually move? What really happens?
Model response: The Sun does not actually move across our sky — the Earth rotates from west to east, so from our perspective the Sun appears to move from east to west. It is like looking out of a train window — the landscape appears to move backward, but you are the one moving forward. Time zones are evidence for Earth's rotation: when it is noon in London, it is already evening in Tokyo (9 hours ahead) and early morning in New York (5 hours behind). This is because different parts of the Earth face the Sun at different times as it rotates. If the Earth did not rotate, one side would always have daylight and the other would always be dark.
Using the rotation model to explain observable phenomena like shadow changes during the day and why sunrise/sunset times change with the seasons.
Example task
At 9am, your shadow points west. At noon, it points north. At 3pm, it points east. Explain this pattern using your knowledge of Earth's rotation.
Model response: Shadows always point away from the light source. As the Earth rotates, the Sun appears to move across the sky from east to west. At 9am, the Sun is in the east (low in the sky), so shadows point west and are long. At noon, the Sun is highest in the south (in the UK), so shadows point north and are shortest. At 3pm, the Sun has moved to the west, so shadows point east and are getting longer again. The changing shadow direction through the day traces the Sun's apparent path, which is really caused by our rotating viewpoint on Earth. Ancient civilisations used this principle to build sundials — the shadow's direction tells the time because Earth's rotation is constant and predictable.
Delivery rationale
Science knowledge concept — factual content deliverable with visual representations and adaptive quizzing.
Moon's Orbit
knowledge AI DirectSC-KS2-C054
Understanding that the Moon is a natural satellite that orbits the Earth. The Moon is approximately spherical. Other planets also have moons. The Moon's orbital relationship with Earth distinguishes it from planets.
Teaching guidance
Use a model with a torch (Sun), a large ball (Earth) and a small ball (Moon) to demonstrate the Moon orbiting Earth while Earth orbits the Sun. Observe the Moon over a month and record its appearance — noting the phases from new moon through crescent, quarter, gibbous to full moon and back. Discuss why the Moon appears to change shape (different portions illuminated as it orbits). Compare the Moon with planets — the Moon is a natural satellite, not a planet. Research other moons in the solar system (Jupiter's Galilean moons, Saturn's Titan). Emphasise that the Moon is approximately spherical.
Common misconceptions
Children commonly believe the Moon produces its own light — it reflects sunlight. Some pupils think the Moon's phases are caused by Earth's shadow falling on the Moon (that is a lunar eclipse, which is rare). Children may believe the Moon is only visible at night, when in fact it is often visible during the day. Some pupils think the Moon does not rotate, but it does — once per orbit, which is why we always see the same face.
Difficulty levels
Knowing that the Moon goes around the Earth and is not a star or a planet.
Example task
What is the Moon? Does it go around the Sun or around the Earth?
Model response: The Moon goes around the Earth. It is not a star and not a planet. It is a moon — a natural satellite that orbits a planet.
Understanding that the Moon orbits the Earth approximately once every 28 days, and that it does not produce its own light — it reflects sunlight.
Example task
The Moon looks bright at night. Does it make its own light?
Model response: No. The Moon does not produce its own light — it is not a star. It looks bright because it reflects light from the Sun. The Sun's light bounces off the Moon's surface and reaches our eyes. This is why the Moon can sometimes look different — we see different amounts of the sunlit side as it orbits the Earth over about 28 days.
Explaining why the Moon appears to change shape (phases) over a month, using a model of the Sun-Earth-Moon system.
Example task
Why does the Moon look like a full circle some nights and a thin crescent on other nights?
Model response: The Moon is always a sphere, but we only see the part that is lit by the Sun. As the Moon orbits the Earth over 28 days, we see it from different angles. When the Moon is between the Earth and Sun, the lit side faces away from us — we see a new moon (dark). As it orbits further, we see more of the lit side — crescent, quarter, gibbous. When the Earth is between the Sun and Moon, we see the fully lit side — a full moon. Then the visible lit area decreases again. The Moon does not actually change shape — our viewing angle changes as it orbits.
Comparing Earth's Moon with moons of other planets and explaining the three-body system of Sun, Earth and Moon.
Example task
Jupiter has at least 95 moons. Earth has one. Mars has two. Why do different planets have different numbers of moons?
Model response: The number of moons a planet has relates mainly to its size and gravity. Jupiter is the largest planet with enormously strong gravity, so it has captured many moons — some are tiny rocky objects, while others like Ganymede are larger than Mercury. Mars is small with weaker gravity and has only captured two tiny moons (Phobos and Deimos). Earth's Moon is unusual — it is very large relative to Earth and was probably formed when a Mars-sized object collided with early Earth, flinging debris into orbit that coalesced into the Moon. Venus and Mercury have no moons at all, possibly because they are too close to the Sun, whose gravity would pull potential moons away. Each planet's moon system tells us something about its history and gravitational environment.
Delivery rationale
Science knowledge concept — factual content deliverable with visual representations and adaptive quizzing.