natural sciences 3

Plants make their own food and are living things.

Plants need water, minerals, air and sunlight.

Plants are born, grow, reproduce and die.

All plants have roots, stems and leaves.

What are plants like?

Are all leaves the same?

Round with a smooth edge

Oval with a smooth edge

Needle-shaped with a smooth edge

Heart-shaped with a toothed edge

The sepals form the calyx.

The pistil has ovules inside.

Stamens have pollen at the top.

Petals form the corolla.

What are the parts of a flower?

An insect takes pollen from the stamen to the pistil.

The pollen joins an ovule inside the pistil. They make a seed.

The petals fall off and the pistil grows into a fruit.

The fruit falls on the ground and its seed grows into a new plant.

How do plants reproduce?

Photosynthesis = minerals + water + sunlight + carbon dioxide = food + oxygen

Roots absorb minerals and water

Leaves absorb sunlight and carbon dioxide

How do plants make food?

How do we classify plants?

Trees have a big, woody stem called a trunk.

Grasses have flexible green stems.

Bushes have woody stems, but they don’t have a trunk. They have branches near the ground.

How do we classify plants?

Deciduous plants lose their leaves in autumn.

Evergreen plants always have leaves.

How do we use plants?

We get wood, rubber, cosmetics and food from plants.

We also get thread, paper, flour and medicines.

We should support national parks and collect rubbish.

We shouldn’t step on flowers or cut down trees.

How can we look after plants?

What have we learnt?

roots leaves

Plants have three parts…

stems

What have we learnt?

trees grass

Plants can be…

bushes

What have we learnt?

water carbon dioxide

Photosynthesis=

minerals sunlight

food and oxygen