What are the characteristics of wood? Second grade science.

1. naturalness: wood is a natural material. Steel, wood, cement and plastic are the four commonly used main materials, only it is directly taken from nature, so wood has the characteristics of low production cost, low energy consumption, non-toxic and pollution-free.

2. Good texture: Wood has good tactile characteristics that are easily accepted by people, far superior to materials such as metal and glass.

3. Thermal insulation: The thermal conductivity of wood is very small. Compared with other materials, the thermal conductivity of aluminum is 2000 times and that of plastic is 30 times. Therefore, wood has good thermal insulation performance. Wood can adjust temperature and dehumidify, and has good environmental protection characteristics.

4. High strength-to-weight ratio: some strength-to-weight ratios of wood are higher than those of ordinary metals, and it is a light and high-strength material.

5. Thermal insulation: The thermal conductivity of wood is very small. Compared with other materials, the thermal conductivity of aluminum is 2000 times and that of plastic is 30 times. Therefore, wood has good thermal insulation performance.

6. Electrical insulation: Wood has poor point conductivity and is a good electrical insulation material.

7. Machinability: the wood has moderate hardness and is easy to process. Common wood products include tenoning, nailing, cementation and various metal connectors; It can also be bent and compressed after cooking.

8. The disadvantages of wood are flammable, perishable, insect-resistant, dry shrinkage and wet swelling.

9, decorative: wood itself has a naturally formed pattern, as furniture and decorative materials, has a good decorative.

The ignition point of wood is:

The ignition point of wood is 200℃-290℃, because wood is a mixture of many materials, and the ignition point is not fixed, because different components have different content. It is also related to the dry humidity, texture and air humidity of wood.

Combustible substances, whether solid, liquid or gas, will burn when they meet a fire source when they coexist with air, and will continue to burn after the fire source is removed. At this time, the lowest temperature of combustible materials is called ignition point, also known as ignition point. Generally, the ignition point of liquid is higher than flash point, and the ignition point of flammable liquid is higher than flash point 1~5℃.