This science article looks at parts of a tree including its leaves, branches, trunks and roots.
Trees are just very big plants with long stems and thick stems! We call the long and thick stems of trees ‘trunks’.
It took millions of years for plants to change into trees. There was a very good reason for plants growing taller. Ancient plants grew taller so they could get more sunlight than other plants.
If you were a short plant, you did not get much sunlight! If you wanted any sunlight you needed to grow taller and become a tree!
As trees grew taller their trunks also grew thicker!
Some trees grow very tall trunks and thick trunks such as this giant sequoia.
Look how tall this giant sequoia is! This one is called the ‘Grizzly Giant’!
Other trees grow trunks that are very tall and narrow..
some trees grow very thick trunks like this tree in Mexico….
…while other trees grow trunks that are not tall or very wide. Tree trunks come in all shapes and sizes!
Most of the time you cannot see the roots of a tree because they are under ground. The roots of a tree keep it safe and stop it falling down.
Sometimes you can see the roots of trees.
You can see half the roots of this mango tree because some of the ground has been washed away by a river.
Sometimes the roots of healthy trees can be seen above ground.
Bark is the skin of a tree. Bark stops trees from losing of water. Bark also stops trees from getting diseases. Bark stops trees being damaged by insects and animals.
The patterns on bark can be very beautiful. This is the pattern of bark on a maple tree.
This is the bark of a silver tree!
The large branches are called ‘boughs’. The smaller branches are called ‘twigs’.
We also know that leaves are green because that is the color that soak up light the best. Trees need to soak up light to help give them energy.
Leaves of trees come in all shapes and sizes. We call the leaves of some trees ‘needles’.Needles were once ‘broad’ leaves that rolled up millions of years ago.
We call these leaves ‘broad leaves’. Look at all those amazing shapes!
Leaves come in some amazing colors.
Forests have trees full of leaves with amazing colors!