Materials and their uses

Depending on the tree, wood can be classified as soft or hard. To make furniture, both of them are widely used.

Let us begin with hardwood. For instance, is a hardwood used to make solid doors. For kitchen tools, could be a good choice. If we want luxury furniture, is the right choice. wood has a beautiful reddish colour.

is an example of softwood. This tree grows in cool regions. is used to make paper. And finally, t tree, quite common in our forests, has leaves in the shape of a needle.

Metals are also used to manufacture goods. The most widely used metal is , but it has a big problem: it rusts easily. On the contrary, doesn't rust internally, and it is perfect to make window frames. is used to make electrical wire. If we need a very tough and ultralight metal, is the best solution. To preserve food, cans are perfect. Car batteries need to work.

However, some metals are made of two or more different pure metals and other materials. Then we have an . is likely to be the best known example: it is made of iron and . When protected against corrosion, we have . is another example: it is ideal for making bells. It is made of copper and . And finally, is an alloy of and zinc. It is used to make cheap jewellery.