WOOD Flashcards
(45 cards)
What is wood?
The principal strengthening and nutrient-conducting tissue of trees and other plants, one of the most abundant and versatile natural materials
Wood is produced by many botanical species, including both gymnosperms and angiosperms, and is available in various colors and grain patterns.
List three properties of wood.
- Strong in relation to its weight
- Insulating to heat and electricity
- Desirable acoustic properties
True or False: Wood is a material that has been in service since humans appeared on Earth.
True
What are the two categories of wood-producing plants?
- Gymnosperms
- Angiosperms
What type of wood do gymnosperms produce?
Softwoods, such as pine and spruce
Gymnosperms are cone-bearing trees.
What type of wood do angiosperms produce?
Hardwoods, such as oak, beech, teak, and balsa
What is the economic importance of wood?
It can be sustainably managed as a renewable resource, providing jobs and supporting economic development.
What are roundwood products?
- Poles
- Posts
- Certain mine timbers
What is the main sawn wood product?
Lumber
Fill in the blank: The yield of lumber in a sawmill varies from about _____ percent.
30 to 70
What is veneer?
A thin sheet of wood of uniform thickness, commonly 0.5–1.0 mm
What are the three methods of producing veneer?
- Rotary-cut
- Sliced
- Sawn
What is plywood?
A panel product manufactured by gluing layers of wood together with grains crossed at right angles.
What are the advantages of plywood over natural wood?
- Dimensional stability
- Uniformity of strength
- Resistance to splitting
What is molded plywood?
Plywood manufactured in curved form, used for boats, furniture, and other products.
What is laminated wood?
Wood built by the parallel gluing of lumber boards in various sizes and shapes.
What is particleboard made from?
Particles of wood glued together, including flakes, shavings, and splinters.
What are the two types of fiberboard?
- Insulation board
- Compressed (hardboard)
What is medium-density fiberboard (MDF)?
A new compressed product manufactured in a range of thicknesses, less dense than hardboard.
True or False: Veneers are primarily used for plywood and furniture.
True
What type of adhesive is commonly used in plywood production?
Thermosetting synthetic resins, such as phenol-formaldehyde and urea-formaldehyde.
What is wood?
Wood is the principal strengthening and nutrient-conducting tissue of trees and other plants, and one of the most abundant and versatile natural materials.
What types of plants produce wood?
Wood is produced by many botanical species, including both gymnosperms and angiosperms.
What are the properties of wood?
Wood is strong in relation to its weight, insulating to heat and electricity, and has desirable acoustic properties.