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Twig

life science Maturity 5-7 Next article →

A twig is a thin and often short branch. It comes from a tree or a bush. These small pieces of wood tell us many things. Scientists look at them to learn about plants. They study the buds on the twig. They also look at abscission scars. These are marks left where leaves fell away.

There are two main ways a twig works. One type is called a vegetative twig. These help the plant grow. The other type is a fruiting spur. These are specialized twigs. They grow from the sides of branches. They are often stubby and grow very slowly. They have many ring markings from past seasons.

Experts can find out a twig's age. They do this by looking at the diameter. They count the winter terminal bud scale scars. These scars create annular ring markings. You can also check the bark. Scientists look at its color and texture. They even look at the pith. The pith is the center of the twig.

Twigs have many real uses in nature. They can help start a fire. People use them as kindling wood. Kindling is wood that helps a fire grow. It sits between dry grass and big firewood. Twigs work well because of stored carbon dioxide. This comes from photosynthesis.

Animals also use twigs as tools. This is a clever way to live. Chimpanzees use twigs for fishing. They use them to catch termites. Elephants use twigs to scratch themselves. They can reach their ears or mouths. They cannot reach these spots by rubbing on trees.

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