Flowering Plants: Pollination, Seed Formation and Dispersal
Flowering Plants: Pollination, Seed Formation and Dispersal
Lesson duration is: 50 minItems in this lesson
Flowering Plants: Pollination, Seed Formation and Dispersal
Open by linking to pupils' everyday experience of seeing flowers, fruits and seeds. The central thread is how flowering plants make new plants, from pollen to seed to dispersal.
Our learning goal
I can explain how flowering plants reproduce through pollination, fertilisation, seed formation and seed dispersal.
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What words do you link with flowers making new plants?
Use this to surface prior knowledge such as pollen, seeds, bees, petals and fruit. Pick out any misconceptions to revisit later, especially confusion between pollination and fertilisation.
What we already know
Plants are living things.
They need water, light, air and nutrients to grow.
Many plants make flowers.
New plants can grow from seeds.
Keep this as prior knowledge content rather than an activity. Briefly connect to earlier KS2 work on plant growth and life cycles.
About this lesson
This KS2 science lesson explores Flowering Plants: Pollination, Seed Formation and Dispersal. Pupils identify the functions of flower parts and explain pollination, fertilisation, seed formation and different methods of seed dispersal. It is suitable for classroom teaching, independent practice or a clear recap of the topic.
This slide contains the verbatim introduction requested by the teacher.
Flowers are plant reproductive parts
A flower is the part of a flowering plant that helps it reproduce.
It contains structures that make pollen, receive pollen and begin seed formation.
Reinforce that not all plants reproduce with flowers, but this lesson focuses on flowering plants only.
Main parts of a flower
Petals attract pollinators
Stamen makes pollen
Carpel receives pollen
Ovary contains ovules
Sepals protect the bud
Use the terms consistently. For KS2, it is helpful to mention that the stamen includes the anther and filament, and the carpel includes the stigma, style and ovary.
What pollen does
Pollen carries the male cells of the plant.
It is made in the anther, which is part of the stamen.
For reproduction to continue, pollen must reach the stigma of a flower.
Avoid overloading with cell detail; keep the idea that pollen carries male cells and must reach the stigma.
The carpel and ovary
The stigma is the sticky top of the carpel.
It catches pollen.
Inside the ovary are tiny ovules.
After fertilisation, ovules can become seeds.
This slide sets up fertilisation and seed formation, so pupils can see the connection between flower structure and function.
What is pollination?
Pollination is the transfer of pollen from the anther to the stigma.
This can happen within the same flower or between different flowers of the same kind.
Stress the exact definition: transfer of pollen to stigma. Pupils often mix this up with fertilisation.
Which part of a flower makes pollen?
Carpel
Stamen
Petal
Sepal
Checks the core structure-function knowledge from slides 4 to 7.
Complete the flower facts
The stamen makes pollen. The sticky top of the carpel is the stigma. Inside the ovary are ovules, which can become seeds later.
The blanks focus on the taught key terms and their jobs. Remind pupils that anther is part of the stamen, but the whole flower part named on the slide is stamen.
How pollen is moved
Pollen can be moved by:
insects such as bees and butterflies
wind
other animals
sometimes water
The English national curriculum commonly highlights insects and wind, but it is fine to mention other animals and water briefly without dwelling on them.
Insect-pollinated flowers
often bright and colourful
may have a strong scent
make nectar to attract insects
have sticky pollen that clings to bodies
Link each feature to function: these flowers are adapted to attract insects and help pollen stick.
Wind-pollinated flowers
often small and dull
do not need scent or nectar
make lots of light pollen
have exposed parts so wind can carry pollen
Contrast with insect-pollinated flowers. Grasses are a useful example of wind pollination.
Pollination is not fertilisation
Pollination is when pollen reaches the stigma.
Fertilisation happens later, when the male cell from the pollen joins with the female cell in an ovule.
These are two different stages.
This distinction is a very common misconception and is central to the lesson's arc.
From pollination to fertilisation
Pollen lands on the stigma → a pollen tube grows down the style → the male cell travels to an ovule → fertilisation happens.
The arrow notation is used here because the process chain is the teaching point. Keep the language simple and do not overcomplicate with microscopic detail.
What is pollination?
A seed starts growing
Pollen reaches the stigma
An ovule becomes a seed
A fruit falls to the ground
Tests the exact definition and prepares pupils for the contrast with fertilisation.
Put the process in place
After pollination, pollen lands on the stigma. A pollen tube grows down the style. The male cell travels to an ovule. Then fertilisation happens.
Use this to reinforce the order of events from slides 12 and 13.
How is pollination different from fertilisation?
Expected elements: pollination is when pollen is transferred to the stigma; fertilisation happens later when the male cell joins the female cell in an ovule. Encourage pupils to mention that they are different stages.
What happens after fertilisation?
After fertilisation, the ovule develops into a seed.
The ovary grows and may become a fruit.
The seed contains the beginning of a new plant.
Clarify that fruits are formed from the ovary in many flowering plants and help protect seeds.
Inside a seed
A seed usually has:
a tiny embryo, which is the young plant
a food store
a seed coat for protection
Keep this at a simple KS2 level. The key idea is that a seed is prepared to grow into a new plant.
Why seed dispersal matters
If seeds all fell beside the parent plant, they would compete for:
light
water
space
nutrients
Dispersal helps plants spread.
This resolves part of the central question: making seeds is not enough; seeds must also reach good places to grow.
Seed dispersal by wind
Some seeds are very light.
Some have wings or hairs.
These features help the wind carry them away from the parent plant.
Dandelion seeds are a common example.
Emphasise adaptation: the structure of the seed matches the way it is dispersed.
Seed dispersal by animals
Seeds can be carried by animals in two main ways:
hooked seeds cling to fur
fruits are eaten and seeds are dropped later
Use simple examples such as burrs for clinging seeds and berries for eaten fruits.
Other ways seeds spread
Water: floating seeds can travel on rivers or the sea
Explosion: some seed pods burst open and scatter seeds
Gravity: some fruits simply fall and roll away
Coconut is a familiar water example; peas or balsam can illustrate explosive dispersal.
The whole process
Flower parts do different jobs.
Pollination moves pollen to the stigma.
Fertilisation happens in an ovule.
Ovules become seeds, and the seeds are dispersed so new plants can grow elsewhere.
This is the synthesis slide that ties the lesson together and answers the central question of how flowering plants reproduce successfully.
Applying the idea
Scientists look at a flower or seed and ask how its features help it do its job.
Bright petals suggest insect pollination.
Light, feathery seeds suggest wind dispersal.
A juicy fruit suggests animal dispersal.
This covers the requested application activity in content form by modelling how pupils apply structure-function thinking to new examples.
Why is seed dispersal important?
To make flowers brighter
To stop seeds drying
To help plants spread
To turn ovules to fruit
The correct idea from slide 16 is that dispersal reduces competition and helps plants spread to new places.
Match the feature to the method
Bright petals suggest insect pollination. Light, feathery seeds suggest wind dispersal. A juicy fruit suggests animal dispersal.
This acts as the application activity check by asking pupils to use features to infer function.
Ways to support learning
Explain the full sequence in order
Compare insect and wind pollination
Link seed shape to dispersal method
Use scientific vocabulary accurately
Use labelled diagrams
Rehearse key words aloud
Match each part to its job
Compare one example at a time
Helpful support
Extra challenge
This addresses differentiation requested by the teacher while staying as student-facing lesson support rather than task instructions.
Which part of this topic feels trickiest now?
Flower parts
Pollination
Fertilisation
Seed dispersal
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What is one thing you will remember from today?
Reflection only. Invite short pupil responses about the main idea they are taking away from the lesson.
What helped you understand this topic best?
Reflection only. Useful for identifying which explanation, diagram or comparison supported understanding best.
Glossary
flower - the reproductive part of a flowering plant
petal - a coloured part of a flower that attracts pollinators
stamen - the male part of a flower that makes pollen
carpel - the female part of a flower that receives pollen
ovary - the part of the carpel that contains ovules
ovule - the structure in the ovary that can become a seed after fertilisation
pollen - powdery grains that carry the male cells of a plant
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Glossary
stigma - the sticky top of the carpel where pollen lands
pollination - the transfer of pollen from anther to stigma
fertilisation - when a male cell joins with a female cell in an ovule
seed - the part that can grow into a new plant
fruit - the ripened ovary that protects seeds
seed dispersal - the spreading of seeds away from the parent plant
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