Question: What category of items often constructed from wood does a chair belong to?
Answer: furniture

Question: Where does wood come from?
Answer: trees

Question: What forms in a tree to increase its diameter?
Answer: woody layers

Question: What is the process of trees growing out to get bigger around called?
Answer: secondary growth

Question: What do many places have four of that would cause growth rings in a tree?
Answer: seasons

Question: If a place has annual seasons, what are the growth rings on the trees there called?
Answer: annual rings

Question: If a growth ring has differences over one season, would the part nearest the tree's center be narrower or wider?
Answer: wider

Question: What name, besides springwood, is used for the part of a growth ring formed in the beginning of the growing season?
Answer: earlywood

Question: If the opposite of springwood is summerwood, what's the opposite of earlywood?
Answer: latewood

Question: Is earlywood usually lighter or darker than the part of the growth ring that forms later in the season?
Answer: lighter

Question: Is summerwood the inner or outer portion of a growth ring?
Answer: outer

Question: What is the sort of circular imperfection in a piece of wood called?
Answer: knot

Question: What property of wood does a knot usually reduce in the wood around it?
Answer: strength

Question: In what direction is wood often sawn so that a knot appears as a solid circle that the grain flows around?
Answer: longitudinally

Question: Are knots usually lighter or darker than the surrounding wood?
Answer: darker

Question: The direction of grain in a knot can differ by as much as how many degrees from the regular wood?
Answer: 90

Question: Other than the base of a side branch, what tree feature causes a knot?
Answer: a dormant bud

Question: What shape is the knot formed by a side branch's base?
Answer: conical

Question: What measurement of a stem determines a knot's inner tip placement?
Answer: diameter

Question: Because a knot's shape is conical, what shape does a cross-section of it have?
Answer: circular

Question: What will the lower limbs of a tree usually do during development?
Answer: die

Question: For what length of time can a dead lower limb stay attached to a tree?
Answer: years

Question: Rather than being joined to the limb that died, where do subsequent layers grow?
Answer: around it

Question: Are the knots that dead tree limbs form attached or not attached?
Answer: not attached

Question: A detached knot will probably drop out of the wood when someone saws it into what?
Answer: boards

Question: What's the process in which knots are classified called?
Answer: grading

Question: Along with firmness, soundness, and form, what property of a knot is classified?
Answer: size

Question: What property of knots does the amount of time a branch stayed on a tree while the stem kept growing affect?
Answer: firmness

Question: What is wood's breaking strength susceptible to? 
Answer: defects

Question: Depending on the placement and size of a knot, what property of structural timber can be affected?
Answer: stiffness

Question: What do stiffness and elastic strength depend on more than defects?
Answer: sound wood

Question: What direction of compression in relation to its grain won't weaken wood with sound knots in it?
Answer: parallel

Question: What positive visual component can knots sometimes add to decorative pieces?
Answer: interest

Question: What term is used to describe what knots can do to affect the finish of things made from wood even when they've been painted?
Answer: bleed

Question: Is bleed easy or difficult to control?
Answer: difficult

Question: The stain from a knot bleeding is usually brownish or what other color?
Answer: yellow

Question: In what stage of processing does knot primer need to be applied for maximum effectiveness?
Answer: preparation

Question: What's another word for "duramen"?
Answer: Heartwood

Question: What is heartwood naturally resistant to?
Answer: decay

Question: How does heartwood formation occur due to its being genetically programmed?
Answer: spontaneously

Question: What adjective describes fully formed heartwood?
Answer: dead

Question: Despite being considered dead, what can heartwood have one chemical reaction to?
Answer: decay organisms

Question: In what part of a tree's cross-section is heartwood visible?
Answer: growth rings

Question: What simple color distinction can heartwood have that makes it stand out from living wood in a tree?
Answer: darker

Question: Along with insect infestation, what process can discolor wood and make it look like heartwood?
Answer: decay

Question: What kind of plants never form heartwood?
Answer: woody

Question: What is the living wood in a tree called?
Answer: sapwood

Question: What term is interchangeable with "sapwood"?
Answer: alburnum

Question: Is sapwood the younger or older wood in a tree?
Answer: younger

Question: What essential liquid is the sapwood tasked with carrying around a tree?
Answer: water

Question: How much of the wood in a tree is sapwood at some point in its life?
Answer: All

Question: Does a tree growing quickly out in the open have thinner or thicker sapwood for its size than the same kind of tree in a dense forest?
Answer: thicker

Question: If a tree starts forming heartwood right away, will its sapwood layer be thin or thick?
Answer: thin

Question: What property of heartwood that has nothing to do with how important it is to trees got it its name?
Answer: position

Question: Does a beech tree usually have thin or thick sapwood?
Answer: thick

Question: Does a sassafras tree typically have a thin or thick sapwood layer?
Answer: Thin

Question: Would a thin or a thick sapwood layer be found in a pine tree?
Answer: thick

Question: What part of a tree is the cross-sectional area of the sapwood approximately proportional to?
Answer: crown

Question: Are more rings necessary if they're narrow or wide?
Answer: narrow

Question: As a tree grows bigger, if the sapwood layer doesn't increase in volume, what will it become?
Answer: thinner

Question: In what part of the tree trunk is the sapwood layer thinnest?
Answer: near the base

Question: Along with the smaller diameter of the upper trunk, what factor leads to thinner sapwood higher up a tree?
Answer: age

Question: What usually covers the whole trunk of a very young tree?
Answer: limbs

Question: What evidence of the stubs of the limbs a tree loses can always be seen in the wood?
Answer: knots

Question: In a very old tree, are you more likely to find a lot of knots in the heartwood or the sapwood?
Answer: heartwood

Question: What hides the stubs of a tree's lost limbs from being visible later in its life?
Answer: Subsequent growth

Question: Since knots are defects that weaken lumber, would the heartwood or the sapwood from the same tree be stronger?
Answer: sapwood

Question: What do broken limbs and deep wounds open a door for in a tree?
Answer: decay

Question: Decay can spread to all of what part of a tree?
Answer: the trunk

Question: What growth stage of insects bore holes into trees?
Answer: larvae

Question: What part of a tree often stays impressively sound even when hundreds or thousands of years old?
Answer: inner heartwood

Question: What evidence do some insect larvae leave in a tree forever?
Answer: tunnels

Question: In what stage of its life does a tree usually grow the fastest?
Answer: youth

Question: As a tree ages, do its growth rings usually get wider or narrower?
Answer: narrower

Question: What part of a tree opens and spreads out more as it matures?
Answer: crown

Question: Is wood production of a tree lessened or increased as it ages?
Answer: lessened

Question: Along with nutrients, what do trees growing in forests have to compete for?
Answer: light

Question: When a big tree is cut up, will the pieces of wood differ or all be the same?
Answer: differ