There are several theories but the two that seem to stick are that sleep: allows your body to replenish energy stores and repair itself. gives you the chance to save energy. Sleep may also aid learning and give our bodies time to organise all the memories of the hundreds of events we experience every day.
Softwood is also used in the production of paper, and for various types of board such as MDF (medium-density fiberboard). The finer softwoods have many special uses. they are used for making window frames,doors,frames,t.v. stands,flooring and beds.
Softwood tree species generally have softer wood than hardwood varieties. Conifer wood contains only a few different cell types. The wood of hardwood trees has more cell types and less air spaces. Hardness can be said to be a function of the woodâs density, and hardwood trees are generally denser than softwood trees. On the other hand, there are many exceptions to this rule. For example, Southern pines are classified as softwoods and have softwood characteristics.