Wood

Question 1

What functions do trees perform (name 4)

Answer 1

Convert Carbon dioxide to oxygen

Absorb heat and UV light

Filter ground water, trapping & diluting pollution

Root systems help stabilize soil erosion

Provide habitat for plants and living creatures

Question 2

What does Spermatophyta mean?

Answer 2

Seed bearing plants

Question 3

Are softwood trees Gymnospermae?

Answer 3

Yes, needle-leaved coniferous, soft wood trees

Question 4

Are hardwood trees Angiospermae?

Answer 4

yes, broad leafed hardwood trees (both deciduous and evergreen)

Question 5

What is the function of leaves & needles on a tree?

Answer 5

Leaves produce nutrients though photosynthesis

Question 6

What does the CITES agreements do?

Answer 6

Convention on International Trade in Endangered Species of Wild Fauna and Flora

To ensure the international trade in specimens of wild animals and plants does not threaten their survival.

Question 7

The majority of the world’s commercial softwood lumber come from the _________ hemisphere.

Answer 7

Northern

Question 8

The majority of hardwood lumber comes from the _________ hemisphere

Answer 8

southern

Question 9

What 3 species of trees make up the majority of Canadian softwood lumber?

Answer 9

Spruce Pine Fir

Douglas Fir

Hem Fir

Question 10

With respect to the lumber industry, what does the acronym NLGA stand for?

Answer 10

National Lumber Grades Authority

Question 11

With respect to the lumber industry, what does the acronym CLSAB stand for?

Answer 11

Canadian Lumber Standards Accreditation Board

Question 12

KD lumber has a moisture content of less than ___%

Answer 12

12-18%

Question 13

The actual size of a 2x4 is ____inches x _____inches

Answer 13

1 1/2” x 3 1/2”

Question 14

The actual size of a 2x12 is ____inches x _____inches.

Answer 14

1 1/2” x 11 1/4”

Question 15

The actual size of a 2x12 is ____inches x _____inches.

Answer 15

1 1/2” x 11 1/4”

Question 16

Timber is solid wood with its smallest dimension no less than _____inches.

Answer 16

140mm (5 1/2”)

Question 17

Explain why timber offers a significant protection against fire, compared to lumber.

Answer 17

Because they’re thicker and take longer to burn. Once char is 1” thick it acts as an insulator.

Question 18

What is the Phloem or Bast layer of a tree?

Answer 18

Inner bark tissue

Question 19

What is the Cambium layer of a tree

Answer 19

Thin layer of living cell tissue that forms the new wood and bark

Question 20

What is the pith of a tree

Answer 20

Central core of the tree. Can be weak and suffer from fungal/insect attacks

Question 21

What is the sapwood layer of a tree

Answer 21

New wood, cells conduct or store nutrients

Question 22

What is the heartwood layer of a tree?

Answer 22

Mature wood in the spine. Darker than sapwood.