Trees are tall plants made of wood.

Plants that aren't quite tall enough to be considered trees are often called shrubs.

Trees can live for thousands of years.

Some trees can grow to around 100 metres (328 feet) in height!

The tallest species of trees in the world include the Coast Redwood, Giant Sequoia, Coast Douglas Fir, Sitka Spruce and Australian Mountain Ash.

The Giant Sequoia is not only tall, it is also wide. Because of its amazing size, some believe that the Giant Sequoia is the largest living organism in the world!

Trees produce oxygen and reduce the amount of carbon dioxide in the atmosphere.

The roots of a tree usually grow underground, helping keep it stable and providing it with water and important nutrients.

Water and nutrients travel up the tree trunk, through the branches and all the way out to the leaves.

The trunk of a tree is protected by an outside layer of bark.

The way a tree grows through different seasons can be seen by growth rings in the wood, they can even be used to determine the age of a tree.

Planting trees can help prevent erosion.

Wood from trees can be used in a number of different ways including as a building material and energy source (such as a campfire).