The leaves on a tree provide the tree with the food it needs to grow and survive, especially during the winter months. The leaves take in water from the roots of the tree and carry it through vacuoles. The leaves take carbon dioxide from the air, and energy from the sun to turn water and carbon dioxide into glucose. This is called photosynthesis. Photosynthesis, chlorophyll, abscission and shorter days during the fall days are some reasons why leaves change colour and fall off the trees in the fall.

Photosynthesis is very important to every living thing on earth. The leaves on a tree provide the food that all trees need to survive and grow. The leaves take in water from the ground through vacuoles. Then the leaves take carbon dioxide from the air, and use the suns energy to turn the water and carbon dioxide into glucose. The...