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Questions and Answers
What are the three distinct surfaces of wood that can be identified?
Cross section, radial, tangential
What parts can be seen within the wood zone in the cross section view?
Heartwood, sapwood, annual growth rings, rays
What features can be observed on the radial surface of wood?
Pith, growth rings, heartwood, sapwood, bark
How is the tangential surface of wood created?
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Despite the name, what does the hardness of hardwood not necessarily imply?
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What are the structural elements of wood tissues?
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What are the long and narrow tube-like cells found in softwoods?
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What are the hard wood cells called?
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What is the major component of wood substance?
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What helps in conducting sap in trees for wood formation?
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What is the outgrowth from an adjoining ray into the lumen of a vessel called?
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What is the main difference between juvenile wood and mature wood?
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Why is juvenile wood more common in lumber today compared to the past?
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What are the two most troubling characteristics of juvenile wood?
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What is reaction wood and why is it of interest to wood dealers?
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What is compression wood and in which type of trees is it common?
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What is tension wood and in which type of trees is it common?
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What is the dry basis moisture content of freshly sawn low density sapwood if it contains nearly two and a half times as much water by weight as dry wood?
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What is the moisture content of freshly sawn wood?
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What is hygroscopicity in relation to wood?
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What happens when the same number of water molecules returns to the wood surface as leaves from it?
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What occurs if more molecules of water leave than return to the wood surface?
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When does wetting take place in wood?
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Why is wood drying necessary to enhance the structural properties of timber for safe construction?
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What is hygroscopicity, and why is it a very important property of wood?
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What is anisotropy in the context of wood, and how does it impact dimensional changes?
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What factors affect wood shrinkage and swelling, and how do they influence dimensional changes?
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What is the simplest method for drying lumber, and how does it work?
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