What tree has the lightest wood? Which wood is the lightest in the world?

Balsa wood. Balsa wood, native to the Americas and the West Indies, introduced in Xishuangbanna in the afternoon of 1962, grows well, is the world's lightest wood, only 115 kilograms per cubic meter, 10 meters long trunk can be carried away by one person, after drying, the specific gravity is, not easy to deform, easy to process, low thermal conductivity, is an excellent insulation, sound insulation and make buoys, life jackets, plastic veneer pad bottom materials. Balsa wood is also one of the tree species with high economic value in Yunnan.

Balsa wood. Balsa (Ochroma lagopus).

The heaviest wood in the world is ironwood, which weighs 1,122 kilograms per cubic meter, so what is the lightest wood? It is a large tree of the Kapok family native to the Americas, balsa wood, which weighs only 115 kilograms per cubic meter. A normal adult can lift balsa wood about 8 times its own volume.

It is said that Columbus first discovered the New World in the 15th century. Since then, European colonists have rushed to send troops to occupy American territory. When the Spanish army arrived in Ecuador, they were amazed to see seven indigenous girls drifting down the rough waves on a raft made of a special kind of wood in the roaring river to Satsuma, sometimes on the crest of the waves, sometimes in the splash, but never sinking.

Later, the soldiers also found that this kind of wood is particularly light and has good antiseptic properties, and local craftsmen use it to make a variety of household utensils and handicrafts, which are very popular with people and are often in short supply. As a result, for the first time, the Spanish military called this wood balsa wood. Later, balsa wood was shipped to Spain and even throughout Europe, and gradually spread throughout the world, and was widely used in aviation, navigation, sound insulation, heat insulation, interior decoration, etc., with particularly good results.

Balsa wood is not only particularly light, the wood is fine and white, insects do not eat, ants do not eat, and it grows rapidly, the trunk is tall and straight, the branches are few, and the leaves are large and round. In the tropical rainforest, it is like a Dai girl wearing a tight short tube skirt, a silver belt, and a green paper umbrella, slender and beautiful, slim and elegant.

In the 60s of the last century, China began to introduce trial balsa wood, and at present, Yunnan, Guangdong, Fujian, Hainan, Taiwan and other provinces and regions have planted.

In China's tree family, balsa wood is the lightest. The tree is twice as light as the cork oak used for cork.

Iron birch is the hardest, balsa wood is the lightest.

1. Balsa wood is the lowest density wood in the world, with a density of about. The wood has a straight grain, a thin and uniform structure, and is very light and soft, so it has very low strength and impact toughness, and is easy to process. However, if the planer knife is not sharp, the board surface is prone to hair.

2. Due to its low density, good dimensional stability, uniform material, low thermal conductivity, easy processing and other advantages, balsa wood has incomparable advantages over other materials, and is widely used as insulating materials, sound insulation equipment, life-saving supplies and aircraft manufacturing and other fields.

3. Balsa is the only evergreen medium tree in the Kapok family and Balsa genus. It is also one of the fastest-growing tree species in the world, growing to 5-6 meters in a year and 5-13 cm in diameter. A 10-year-old balsa tree can reach a height of 16 meters and a diameter of 50-60 centimeters.

Due to the rapid renewal of cell tissue in the body, all parts of the plant are unusually light and soft and elastic.

Fourth, iron birch wood is hard, can be used for aerospace accessories, appliances, high-end cars, cruise ship accessories, pipes, can be used instead of steel. It can be used to make high-end furniture, handles, handles, and so on. The roots of the iron birch tree are used to make the best coffee tables.

5. Iron birch, also known as: Sai black birch, shell bucket, birch family, birch deciduous tree. It is found in the eastern and southeastern parts of Jilin, China.

Legend has it that the wood of the iron birch, which is three times harder than oak and twice as hard as ordinary steel, is the hardest wood in the world, and is used as a substitute for metal. Iron birch is a rare and endangered wild plant, which is critically endangered and on the verge of extinction. People call it the Wood King.

Common woody and hard trees are ebony, iron birch, pine, peach, persimmon, cherry, osmanthus, etc. Their trunks are very hard, and each tree has its own unique purpose, which can be used as a furniture material as well as for ornamental. In addition, they are also relatively resistant to cold and drought.

Iron birch. The birch is a hardwood tree with a height of about 20 meters and a trunk diameter of about 70 centimeters. It is a deciduous tree with strong cold resistance. Birch prefers to grow in warm environments, probably on the mountains at an altitude of 700 meters.

Persimmon tree. The persimmon tree belongs to the persimmon tree. It is a woody, hard, hardy tree that generally grows in sunny, moist, closed, deep, fertile, well-drained soil.

Cherry. Cherry blossom trees are very adaptable to the land and prefer to grow in gravelly or sandy loam soils, so that they can grow luxuriantly. At present, it is distributed in Jiangsu, Beijing, Hebei, Zhejiang, Shandong, Northeast and Northwest China.

Peach. Peach trees are hardwood trees that can be used as ornamental plants. Peach trees have strong drought and cold resistance, and generally grow in a sunny environment, mainly distributed in Guizhou, Sichuan, Yunnan and other places in China.

Balsa wood, also known as balsa wood, which grows in the tropical forests of the Americas, is one of the fastest-growing trees and the lightest wood in the world. This tree is evergreen all year round and has a tall trunk. The leaves are like sycamores, the five yellowish-white petals are like hibiscus flowers, and the fruit is split like cotton.

It has long been introduced in the southern part of Taiwan. Since 1960, it has been widely cultivated in Guangdong, Fujian and other places, and it has grown very well.

Balsa wood weighs only one gram per cubic centimeter, which is one-tenth the weight of the same volume of water. The aspen we use for matchsticks is three and a half times heavier. Although its wood is light, it is structurally strong, making it a valuable material for aviation, navigation and other special crafts.

Local residents have long used it as rafts to travel between the islands. In China, it is used as a cork for thermos.

Answer 1: 1. Omitted.

2. It is full of green tropical plants, and there are many interesting trees growing there.

3. Total score.

4. The center of the trunk is jet black, and the main trunk is sawed, and two or three new trunks will grow from the stump in the second year, and then sawn and grown, and the longer it grows, the longer it grows.

5. (1) Balsa wood is one of the lightest woods in the world, and the furniture made from it can be easily transported!

2) Tieli wood is not only heavy, but also dense and hard, which is an excellent material for construction and the production of precious furniture, and can also be used to make high-end musical instruments. Characteristics: balsa wood trees are light and labor-saving, and ironwood trees are dense and hard.

Answer 2: Give a braille choice explanation.

Tall and straight (d towering) Dense wood (d fine).

Sentence before and after: It is full of green tropical plants, and there are many interesting trees growing there. And Xishuangbanna is home to more than 5,000 species of plants, and there are many more interesting trees.

The gist of paragraph 2 3 4: Paragraph 2 3 4 writes the characteristics of the black heart tree balsa wood iron power wood.

Characteristics of the Blackheart Tree: The name is strange, the trunk is jet black, and the trunk is sawn and grows again.

Sentence that illustrates balsa lightness:

It is tall and straight, but its weight is so light that 0 5 cubic meters of wood can be carried by one person.

.Ironwood heavy. A 40 cm in diameter and 25 cm in height is a wooden cutting board that people with less strength can't hold up. Characteristics: balsa wood trees are light and labor-saving, and ironwood trees are dense and hard.

There are different questions and different answers, so each finds the answer they need!!

Iron birch. Iron birch, also known as Sai black birch, shell bucket, birch family, birch is a deciduous tree. The tree is about 20 meters high, with a trunk diameter of about 70 centimeters, a dark red or nearly black bark with dense white spots and oval leaves.

It grows very slowly and has a lifespan of up to 300 500 years. It is distributed in the eastern and southeastern parts of Jilin, western Zhejiang, and northeastern Liaoning in China, as well as in Russia, North Korea, and Japan.

It grows in the mountains at an altitude of about 700 meters. Iron birch wood is three times harder than oak and twice as hard as ordinary steel, making it the hardest wood in the world, and people use it as a substitute for metal.