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The aim of my research is To learn information about trees To learn the parts of trees and their functions To describe the trees of the Crimea To find out why trees are useful
What is a tree? A tree is a tall plant with wooden trunk and branches which grow up. (Cambridge Dictionary) Trees are the oldest and the largest living things on the planet and one of the Earth’s natural resources.
The main part of a tree is leaves that are connected to branches that are connected to the trunk which is connected to the roots.
Leaves are very important to a tree because they make food for it. To make food 3 things are needed: Water Nutrients Sunlight
Broadleaves have flat leaves. Many broadleaves can’t grow in cold weather or dry weather. In autumn all the leaves fall off the tree. The leaves grow again in hot weather or rainy weather. All leaves have veins that help move food and water to the leaf. Conifers have thin, sharp needles. Animals can’t eat the sharp needles. The needles don’t get dry so the trees can grow in dry, hot and cold weather.
Half a million leaves can fall off a very big tree.
Under each tree there is a great root system. Roots have 3 functions: support, storage and nutrients pick-up. Roots are not deep. Many roots are found in the top 18-25 inches of soil. Roots are foundation for trees. The roots are shallow because there is lots of oxygen available at shallow levels. And tree roots need oxygen for tree to grow. The big fat roots at the base of the trunk store food for the tree. Water and nutrients are picked up from soil from very tiny roots that are called hairy roots. They give the root a better chance to absorb more water and nutrients.
The roots of a South African fig tree reach 400 feet into the ground. They are the deepest roots in the world.
Some trees have big flowers. Some trees have little flowers. Flowers make pollen. The wind blows pollen from one flower to others. Insects take pollen to other flowers too. Then the tree can grow seeds. Seeds grow inside fruit. The fruit protects the seeds. The fruit falls from the tree. Then then seeds go into the ground. New trees grow from the seeds.
In the Crimean towns and villages we can come across such trees as ash-trees, birches, hornbeams, juniper, larch-trees, poplars, walnuts, cypresses, willows and others.
Acacia Its wood is dense and doesn’t rot Acacia leaves are rich in essential oils Leaves are food for animals It enriches soil with nitrogen. . It can survive in any environment Its honey is very valuable and healing It enriches soil with nitrogen Did you know that… ~the first director of the Nikitsky Botanical garden Kh.Steven got acacia seeds in 1813from Osnovyanskiyi garden
Thank you for your attention.