🌱How Plants Make Food
Green plants make their own food in their leaves. This amazing process is called photosynthesis. To make food, a leaf needs four things:
- ☀️ Sunlight — the energy.
- 💧 Water — drawn up by the roots.
- 💨 Carbon dioxide — a gas taken from the air.
- 🍃 Chlorophyll — the green colour in leaves that traps sunlight.
The plant makes food (a sugar) and gives out oxygen — the very air we breathe!
🤔 Vidi's Wonder Questions
What is chlorophyll?
Chlorophyll is the green substance in leaves. It traps the energy in sunlight, which the leaf then uses to make food. That green colour is a plant's super-power!
Why are plants so important for us?
Plants make the oxygen we breathe and the food we eat. During photosynthesis they take in carbon dioxide and give out oxygen — cleaning our air and feeding the world.
🤖 Vidi's Key Points
- Plants make their food in leaves by photosynthesis.
- They need sunlight, water, carbon dioxide and chlorophyll.
- Plants give out oxygen — the air we breathe.
🐝Parts of a Flower
A flower has special parts, each with a job in making seeds:
- 🌸 Petals — bright and scented to attract insects and birds.
- 🍃 Sepals — small green parts that protect the flower bud.
- ♂️ Stamen — the male part; it makes a yellow dust called pollen.
- ♀️ Pistil — the female part in the centre; it receives pollen and makes seeds.
🤔 Vidi's Wonder Questions
Why are most flowers brightly coloured?
Bright petals and sweet smells attract insects like bees and butterflies. The insects come for nectar and carry pollen between flowers — helping the plant make seeds.
Which is the male part and which the female?
The stamen is the male part — it makes pollen. The pistil in the centre is the female part — it receives pollen and grows the seeds.
🤖 Vidi's Key Points
- Petals attract insects; sepals protect the bud.
- The stamen (male) makes pollen.
- The pistil (female) receives pollen and makes seeds.
☀️Pollination
Pollination is the moving of pollen from the stamen to the pistil. This must happen before seeds can form. Pollen is carried by:
- 🐝 Insects — bees and butterflies pick up pollen as they sip nectar.
- 💨 Wind — blows light pollen from flower to flower.
- 🐦 Birds and even water can carry pollen too.
🤔 Vidi's Wonder Questions
How do bees pollinate flowers?
A bee visits a flower for sweet nectar. Pollen sticks to its furry body. When it flies to the next flower, some pollen rubs off onto that flower's pistil — pollination!
Why are bees so important?
Bees pollinate a huge number of plants, including the ones that give us fruits and vegetables. Without bees, we would have far less food. Bees are tiny heroes!
🤖 Vidi's Key Points
- Pollination moves pollen from stamen to pistil.
- It is carried by insects, wind, birds and water.
- Bees are very important pollinators for our food.
💧From Flower to Fruit and Seed
After pollination, the flower changes into a fruit with seeds inside:
- 🌸 The pollen reaches the pistil and seeds begin to form.
- 🥀 The petals dry up and fall off.
- 🍎 The pistil grows into a fruit that holds the seeds.
- 🌱 Each seed can grow into a brand new plant!
So an apple, a tomato and a pea pod are all fruits that protect seeds.
🤔 Vidi's Wonder Questions
Is a tomato a fruit?
Yes! In science, a fruit is the part that grows from the flower and holds the seeds. A tomato has seeds inside, so it is really a fruit — even though we cook it like a vegetable.
Why does a fruit protect the seed?
The fruit keeps the seeds safe as they grow, and often becomes tasty so animals eat it and carry the seeds away — helping new plants grow in new places.
🤖 Vidi's Key Points
- After pollination, seeds form and petals fall off.
- The pistil grows into a fruit holding the seeds.
- Each seed can grow into a new plant.
🍃How Seeds Travel
Seeds need to travel away from the parent plant to find their own space, sunlight and water. This is called seed dispersal. Seeds travel by:
- 💨 Wind — light, fluffy seeds float away (dandelion, drumstick).
- 💧 Water — seeds that float drift to new shores (coconut).
- 🐾 Animals — sticky or hooked seeds catch on fur; or animals eat fruit and drop the seeds far away.
- 💥 Bursting — some pods pop open and fling their seeds out (pea, balsam).
🤔 Vidi's Wonder Questions
How does a coconut travel?
A coconut has a thick, light husk that floats. It can drift across the sea for a long way and then grow into a new coconut tree on a faraway beach!
Why must seeds travel away from the parent?
If seeds grew right under the parent plant, they would crowd together and fight for sunlight, water and space. Spreading out gives each seed a better chance to grow.
🤖 Vidi's Key Points
- Seed dispersal spreads seeds away from the parent plant.
- Seeds travel by wind, water, animals and bursting pods.
- Spreading out gives each seed space to grow.
🧪 Try it at Home!
Be a Botanist — open up a real flower and find all its parts! 🌺
🧺 You will need
- A large flower (a hibiscus or lily works well)
- A sheet of white paper
- A magnifying glass, if you have one
- A grown-up to help
👣 Steps
- Place the flower on the white paper and look at it closely.
- Find the bright PETALS and the small green SEPALS underneath.
- Look inside for the STAMENS — gently touch one and see the yellow pollen.
- Find the PISTIL standing in the very centre.
- Draw your flower and label all four parts you found.
🎯 Mission Test
Ready, Science Explorer? Take the chapter test to show what you've discovered!
Start the Chapter Test →