PROBLEM AND ITS BACKGROUND
INTRODUCTION
Wood is a hard, fibrous structural tissue found in the stems and roots of trees and other woody plants. It has been used for thousands of years for both fuel and as a construction material. In a living tree it performs a support function, enabling woody plants to grow large or to stand up by them. It also mediates the transfer of water and nutrients to the leaves and other growing tissues. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or wood chips or fiber.
People have used wood for millennia for many purposes, primarily as a fuel or as a construction material for making houses, tools, weapons, furniture, packaging, artworks, and paper. Wood can be dated by carbon dating and in some species by dendrochronology to make inferences about when a wooden object was created. The year-to-year variation in tree-ring widths and isotopic abundances gives clues to the prevailing climate at that time.
Wood has been an important construction material since humans began building shelters, houses and boats. Nearly all boats were made out of wood until the late 19th century, and wood remain in common use today in boat construction. Elm in particular was used for this purpose as it resisted decay as long as it was kept wet.
Narra has good weathering characteristics and is typically very durable regarding decay resistance. It is generally resistant to termite and powder post beetle attack, though there can occasionally be ambrosia beetles present, especially in the sapwood. Narra has a distinct fragrance that lingers even after being worked.
Statement of the Problem
1. Which type of wood is easy to be burn? 1.1. Mahogani 1.2. Giho 1.3. Antipolo 1.4. Yakal 1.5. Narra
2. What are the advantages of knowing which type of wood does not burn easily?
3. Which type of wood has the least chance to be burn? 3.1.Mahogani 3.2. Giho 3.3. Antipolo 3.4.