How do trees grow
How do trees grow
Trees, like most plants, usually start life as a seed that has fallen to the ground from a tree.
If the soil is warm and moist enough, the seed will open.
Roots start growing down into the soil.
They take water and nutrients from the soil.
The plant uses these things to start growing.
Next, a stem starts growing up to the light.
Branches grow from the stem and leaves grow from the branches.
The stem holds the branches and leaves up so they can get sunlight.
The leaves use sunlight (along with water and air) to make food for the plant.
The stem also carries water and nutrients from the roots to the leaves.
This small plant is called a seedling.
As the tree gets bigger, it needs more food and air, so it grows more leaves.
The tree grows taller and the stem gets thicker.
The stem is now called a trunk.
The tree starts to look like its parents.
This young tree is called a sapling.
Trees keep growing for as long as they live and can live for a very long time.
Some trees can grow as tall as 100 metres, or live for thousands of years.
If you find a tree that has been cut down, you will see rings in its trunk.
The rings show how many years the tree has grown.
Each ring shows one year of growth.
bare tree in winter
Some trees look different at different times of the year.
They have leaves that change colour in autumn or fall off in winter.
Some grow beautiful flowers in the spring that turn into fruit, while others have cones.
Trees can get ‘sick’ and die.
They can get diseases or
be attacked by insects.
If they don’t have the right temperature and enough water, light and nutrients they can die.
They can be destroyed by fire, humans, weather, poisons, animals and disease.
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