Wood is the main substance in trees. Wood is used for construction of buildings or furniture, and also for art. It is also used for making fires and heating. Paper is made from wood by a chemical reaction.
Wood is very hard to cut, but it is also very strong. A lumberjack is a person who cuts down trees. After a tree falls, the wood in it can be cut into long, straight pieces called lumber. Lumber can then be used to make posts, or put together with nails, screws, or even glue to make wooden frames for other shapes.
For a long time and even today, many buildings, mostly houses, have been made of wood. To build a house with wood, lumber is put together into frames that are the shape of each wall, floor, and roof of the house. Then the frames are placed into the shape of a house. Then the frames can be covered to make solid walls. Sometimes the walls are made of more wood.
When the outside of a house or building is covered in wood, the wooden pieces are usually flat and stacked. These pieces are called shingles. Wood is also sometimes used in other parts of the house, like doors and staircases. Wood is also used to make fences.
A place that has many trees in it that are close together, like a forest, is sometimes called 'the woods' when it is not very big.
Wood can be turned into paper in large factories called paper mills. The wood is first chopped into small chips and cooked with chemicals in large vessels. The chemicals separate a substance called cellulose off the wood. The cellulose is then added with other chemicals and additives, and pressed into paper in large machines called paper machines. Most paper is made from pine, spruce and eucalyptus.
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