Seasonal Changes
KS1SC-KS1-D005
Understanding of observable patterns in weather and seasonal variation, including how day length varies across the year.
National Curriculum context
The Seasonal Changes domain, taught in Year 1, introduces children to one of the most observable patterns in the natural world: the cyclical change in weather, temperature, day length and biological activity that characterises the four seasons. Pupils observe changes across spring, summer, autumn and winter, describe the weather associated with each season, and begin to notice that day length varies significantly throughout the year. This domain is particularly valuable for developing the process skill of observation over time, as meaningful engagement requires sustained attention across the school year. It connects directly to biology (deciduous and evergreen trees, animal behaviour) and to geography (climate and weather), and provides an accessible, first-hand context in which to practise systematic scientific observation and recording.
3
Concepts
2
Clusters
3
Prerequisites
3
With difficulty levels
Lesson Clusters
Identify the four seasons and describe their typical weather
introduction CuratedNaming the seasons and associating each with characteristic weather patterns are the foundational concepts of this domain; they provide the framework for all subsequent seasonal observation.
Observe and measure how day length changes across the year
practice CuratedDay length variation through sunrise and sunset observation is the one quantitative element of KS1 seasonal change; recording it over time connects directly to the observation-over-time enquiry type.
Teaching Suggestions (1)
Study units and activities that deliver concepts in this domain.
Seasonal Changes Diary
Science Enquiry Observation Over TimePedagogical rationale
Observation over time is the natural enquiry type for seasonal changes because the phenomenon unfolds across an entire year. Regular, brief outdoor observations (weekly weather recording, monthly playground photographs) build the scientific habit of systematic data collection. Children experience the evidence for seasonal change directly rather than learning about it secondhand, making the knowledge deeply rooted in personal experience.
Prerequisites
Concepts from other domains that pupils should know before this domain.
Concepts (3)
The Four Seasons
Keystone knowledge AI DirectSC-KS1-C029
Understanding that a year is divided into four seasons - spring, summer, autumn and winter - each with characteristic weather, temperature, day length and changes to the natural world. This is one of the most fundamental patterns in the natural world, directly observable by pupils. The ability to name and characterise the four seasons is foundational to all environmental science.
Teaching guidance
Observe the seasons as they actually occur rather than just from pictures. Keep a seasonal journal or class diary throughout the year. Go outside regularly in all seasons. Compare seasonal photographs taken from the same viewpoint at different times of year. Link to changes in plants, animals, weather and day length.
Common misconceptions
Children in the UK may have a distorted view of seasons based on books featuring idealised summer or winter conditions. Some children think it is always the same season everywhere in the world at the same time (it is summer in Australia when it is winter in the UK).
Difficulty levels
Naming the four seasons in order, with visual support such as photographs.
Example task
Look at these four pictures. Can you name each season? Put them in order starting with spring.
Model response: Spring, summer, autumn, winter.
Describing one or two characteristics of each season, such as typical weather or changes to plants.
Example task
What is the weather usually like in summer? What about winter?
Model response: In summer it is warm and sunny with long days. In winter it is cold, the days are short, and it might snow or frost.
Describing the characteristics of all four seasons including weather, day length and changes in the natural world, and explaining that the seasons follow a repeating annual pattern.
Example task
Describe what happens in the natural world during autumn. How is it different from spring?
Model response: In autumn, leaves on deciduous trees change colour (yellow, orange, red) and fall off. The days get shorter and cooler. Animals like squirrels collect food for winter. Some birds fly to warmer countries. In spring, it is the opposite — new leaves grow, days get longer and warmer, flowers appear, birds build nests, and baby animals are born. Autumn is when nature prepares for winter; spring is when it wakes up again.
Explaining why the seasons follow a repeating pattern and how living things respond to seasonal changes as part of their survival.
Example task
Why do some birds fly south in autumn and return in spring? How does this link to the seasons?
Model response: In autumn, the days get shorter and colder in the UK, so there are fewer insects and berries for birds to eat. Some birds like swallows fly south to warmer countries where there is still plenty of food — this is called migration. They return in spring when the UK gets warmer, days get longer, and food becomes plentiful again. The birds follow the seasonal pattern because their survival depends on having enough food, and the seasons affect food supply.
Delivery rationale
Science knowledge concept — factual content deliverable with visual representations and adaptive quizzing.
Seasonal Weather Patterns
knowledge AI DirectSC-KS1-C030
Understanding that each season is typically associated with characteristic weather patterns in the UK: spring (mild, showery), summer (warm, longer days, less rain), autumn (cooling, wet, windy), winter (cold, shorter days, possibility of frost and snow). Pupils observe and describe weather over time, developing the understanding that weather patterns are broadly predictable by season.
Teaching guidance
Maintain a class weather chart throughout the year. Record temperature, cloud cover, precipitation and wind. At the end of each season, collate the data and discuss what was typical. Use weather data to introduce the idea of climate (typical long-term patterns) versus weather (day-to-day variation).
Common misconceptions
Children often think it always snows in winter in the UK (it frequently does not, especially in southern England). They may think all rain falls in autumn and winter, not appreciating that it can rain heavily in summer too.
Difficulty levels
Describing today's weather using simple words such as sunny, rainy, cloudy, windy, cold or warm.
Example task
Look out of the window. What is the weather like today?
Model response: It is cloudy and a bit cold. I can see the wind blowing the trees.
Recording daily weather over a week or more and beginning to notice which types of weather are common in the current season.
Example task
Look at our weather chart for the last two weeks. What type of weather happened most often?
Model response: It was cloudy on eight days and rainy on five days. It was only sunny on three days. Cloudy weather was the most common this month.
Describing the typical weather patterns for each UK season, using data from class weather records as evidence.
Example task
We recorded the weather in September, October and November (autumn). Describe the pattern of autumn weather using our records.
Model response: In September it was still quite warm with some sunny days. In October it got cooler and we had more rain and wind. By November it was cold, we had some frost in the mornings, and the days were noticeably shorter. The pattern shows that autumn weather gets gradually colder and wetter, with shorter days, as we move towards winter.
Comparing weather across seasons using collected data, distinguishing between typical weather patterns and unusual events, and understanding that weather varies from year to year.
Example task
In December we had an unusually warm week with temperatures of 14°C. Does this mean winter is not cold? Explain using what you know about seasonal weather patterns.
Model response: No, one warm week does not change the overall pattern. Winter in the UK is typically cold with short days, frost and sometimes snow. But the weather on any single day or week can be different from what is typical — that is why we record weather over a long time. The warm December week was unusual, not typical. If we look at all our winter records over several months, the overall pattern is still cold. Weather is what happens day to day; the seasonal pattern is what usually happens over many weeks.
Delivery rationale
Science knowledge concept — factual content deliverable with visual representations and adaptive quizzing.
Day Length Variation
knowledge AI DirectSC-KS1-C031
Understanding that the length of daylight (hours between sunrise and sunset) varies throughout the year, with the longest days in summer (up to about 16 hours in the UK) and the shortest in winter (as few as 8 hours). Pupils observe this directly - noticing that it is dark when they travel to school in winter but still light in summer evenings. Note: pupils must never look directly at the Sun.
Teaching guidance
Use published sunrise/sunset data to record day length at regular intervals. Draw attention to the contrast in a very practical way - 'It is still light at bedtime now; in January it was dark by 4 o'clock'. Avoid asking pupils to observe the Sun directly. Connect to why nocturnal animals are more active in winter with its longer nights.
Common misconceptions
Children (and some adults) believe that in summer the Earth is closer to the Sun (it is actually very slightly further away). The correct reason for day length and seasonal temperature is the tilt of Earth's axis, which is not covered until later in the curriculum.
Difficulty levels
Noticing from personal experience that it gets dark earlier in winter and stays light later in summer.
Example task
Think about when you go to bed. Is it dark or light outside at bedtime in summer? What about winter?
Model response: In summer it is still light at bedtime. In winter it is dark before I go to bed and dark in the morning too.
Knowing that days are longer in summer and shorter in winter, and that this pattern changes gradually through the year.
Example task
Which season has the longest days? Which has the shortest? How do the days change from summer to winter?
Model response: Summer has the longest days — it stays light until about 9 o'clock at night. Winter has the shortest days — it gets dark by about 4 o'clock in the afternoon. The days get gradually shorter from summer through autumn to winter, then gradually longer again through spring.
Describing the pattern of day length change across the year using data, and connecting longer days with summer warmth and shorter days with winter cold. Safety: never look directly at the Sun.
Example task
We recorded sunrise and sunset times each month. In June, sunrise was at 5:00am and sunset at 9:15pm. In December, sunrise was at 8:00am and sunset at 3:45pm. How many hours of daylight in each month?
Model response: In June there were about 16 hours of daylight (5am to 9:15pm). In December there were only about 7 hours and 45 minutes of daylight (8am to 3:45pm). Summer days are more than twice as long as winter days. This connects to why summer is warmer — the sun is up for longer so the ground gets more heat. Remember we must never look directly at the Sun, even when studying day length.
Predicting day length patterns for months not yet recorded and explaining how day length affects plants, animals and human activity.
Example task
If the shortest day is in December and days get longer until June, predict what day length would be like in March (between December and June). How does day length affect nature?
Model response: March is halfway between December (shortest) and June (longest), so the day length should be roughly in the middle — about 12 hours. This makes sense because in March the sun sets around 6pm. Longer days in spring trigger plants to start growing and flowers to bloom. Birds begin nesting because the longer days give them more time to find food for their chicks. Shorter winter days mean less time for animals to find food, which is why some animals hibernate.
Delivery rationale
Science knowledge concept — factual content deliverable with visual representations and adaptive quizzing.