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1.

What is the primary function of wood structure in a tree?

a)

Provide support and strength for the tree's growth

b)

Attract insects for pollination

c)

Store water for the tree

d)

Provide shade for the tree

2.

What are the main components of wood ?

a)

Iron, steel, and aluminum

b)

Water, air, and sunlight

c)

Plastic, rubber, and glass

d)

Cellulose, hemicellulose, and lignin

3.

How does the structure of hardwood differ from softwood?

a)

Hardwood has a less dense and less complex structure compared to softwood.

b)

Hardwood has a similar structure to softwood.

c)

Hardwood has a denser and more complex structure compared to softwood.

d)

Hardwood has a lighter and simpler structure compared to softwood.

4.

What is the role of growth rings in wood structure?

a)

They are a sign of disease in the tree

b)

They are used for water storage in the tree

c)

They indicate the age of the tree and provide information about its growth patterns.

d)

They are a result of insect infestation

5.

What are the characteristics of earlywood and latewood in wood structure?

a)

Earlywood has larger cells and is lighter in color, while latewood has smaller cells and is darker in color.

b)

Earlywood is darker in color and has smaller cells, while latewood is lighter in color and has larger cells.

c)

Earlywood has smaller cells and is lighter in color, while latewood has larger cells and is darker in color.

d)

Earlywood and latewood have the same size cells but different colors.

6.

How can you identify the type of wood based on its structure?

a)

Microscopic examination or using a hand lens

b)

By smelling the wood

c)

By listening to the wood

d)

By tasting the wood

7.

What are the different types of wood cells and their functions in wood structure?

a)

Tracheids, vessel elements, fibers, and parenchyma cells are the different types of wood cells. Tracheids and vessel elements are responsible for water transport, fibers provide mechanical support, and parenchyma cells store and transport nutrients.

b)

Xylem, phloem, cambium, and pith cells. Xylem and phloem cells provide mechanical support, cambium is responsible for water transport, and pith cells store and transport nutrients.

c)

Sclerenchyma, collenchyma, chlorenchyma, and aerenchyma cells. Sclerenchyma and collenchyma cells are responsible for water transport, chlorenchyma provides mechanical support, and aerenchyma cells store and transport nutrients.

d)

Epidermal, cork, companion, and guard cells. Epidermal and cork cells provide mechanical support, companion cells are responsible for water transport, and guard cells store and transport nutrients.

8.

Explain the concept of grain in wood structure.

a)

The color of the wood

b)

The age of the tree

c)

The type of finish applied to the wood

d)

The direction of the wood fibers.

9.

What are the factors that affect the structure of wood?

a)

Color of the wood

b)

Age of the tree

c)

Type of soil

d)

Growth conditions, species of tree, and the presence of defects or damage

10.

How can understanding wood structure help in woodworking and carpentry?

a)

It has no impact on woodworking and carpentry

b)

It helps in identifying the best techniques for cutting, shaping, and joining wood.

c)

It helps in identifying the best techniques for painting and varnishing wood

d)

Understanding wood structure is not important for woodworking and carpentry

11.

When you utilize the wood, you mitigate climate change.How?

a)

When we utilize the wood, we are preserving the carbon

b)

When we utilize the wood, carbon in the form of methane became part of the pollutants

c)

When we utilize the wood, we are using the chemicals that emits carbon to the atmosphere

12.

.All wood from Softwoods are

a)

soft

b)

hard

c)

gymnosperms

d)

Angiosperms

13.

It provides rigidity to the structure of the wood, it is also the cementing substance in wood

a)

Cellulose

b)

extractives

c)

lignin

d)

phloem

14.

BONUS:

If you would rate your satisfaction in gaining knowledge in this subject, what rating would you give?

a)

1-3

b)

4-5

c)

6-7

d)

8-10

15.

It serves as the main framework of the structure of the cell

a)

lignin

b)

extractives

c)

Cellulose

d)

phloem

16.

Wood is _______substance which means it has the ability to gain or loss moisture.

a)

microscopic

b)

exotic

c)

hygroscopic

d)

anisotropic

17.

Gymnosperms are commercially known as _________.

a)

hardwoods

b)

heartwood

c)

softwoods

d)

sapwood

18.

Conifers are NOT____.

a)

Gymnosperms

b)

evergreens

c)

softwoods

d)

hardwoods

19.

Wood is a material of plant origin characterized by fibrous structure and largely made up of lignin, hemicellulose and ____

a)

essential oil

b)

pith

c)

sapwood

d)

cellulose

20.

Conifers are the sources of ____ lumber.

a)

hardwood

b)

soft

c)

hard

d)

softwood

21.

Sapwood is generally ____ than heartwood.

a)

harder

b)

stronger

c)

darker in color

d)

lighter in color

22.

. Mahogany(Swietenia macrophylla) belongs to the

a)

Philippine Mahogany Group(PMG)

b)

C and F

c)

Premium

d)

LUS

23.

Molave and Kamagong belongs to ________DAO Group(timber Groupings)

a)

Construction and Furniture

b)

Premium

c)

LUS

d)

P and M

24.

We can find ____extractives in the sapwood than heartwood.

a)

less

b)

more

c)

zero

d)

large amount of

25.

The wood belonging to Premium timber groupings are primarily used for _____

a)

paper making and matchsticks

b)

high grade furniture

c)

firewood

d)

lumber

26.

These are crystal/cyst-like structure found inside the pores/vessels.

a)

tylosis

b)

deposits

c)

pith

d)

parenchyma

27.

It is also called ash test; involve burning a splinter of the heartwood, of matchstick-size, in still air and noting the appearance of the residue, maybe charcoal partial ash, or complete/full ash.

a)

Frothing test

b)

Flourescence test

c)

Splinter test

d)

Bubble test

28.

You are a DENR officer assigned at the checkpoint. A truck of freshly cut lumber is going to pass through you. The owner of the lumber declared that the woods are planted species like mahogany and falcata. But you suspect that it has some premium narra ( a species not allowed to cut if without a permit) underneath. What are you going to do?

a)

Ash test

b)

Florescence test

c)

Splinter test

d)

Bubble

29.

Parenchyma cells are storage of _____

a)

food

b)

water

c)

deposits

d)

extractives

30.

These are the part of the tree who distributes food from the leaves to the other parts of the plant.

a)

xylem

b)

phloem

c)

pith

d)

bark

31.

This distribute water from the roots

a)

xylem

b)

phloem

c)

pith

d)

bark

32.

The ___ layer is the thickest layer of the secondary wall.

a)

S1

b)

S2

c)

S3

d)

primary wall

33.

A _____is a recess in the secondary wall of the cell, open of the lumen on one side and including the membrane closing the recess on the other side.

a)

Pit

b)

vessel

c)

pith

d)

torus

34.

It is the thickened portion of the pit membrane of bordered pits.

a)

Margo

b)

torus

c)

pith

d)

pit aperture

35.

Refers to any irregularity or deviation from the qualities that make a wood suitable for a particular purpose.

(a)

36.

These are Tests used in wood identification, except

a)

ash test

b)

splinter test

c)

frothing test

d)

diagnostic test

37.

The easiest among the methods of Wood Identification

a)

Asking an expert

b)

Using photographs

c)

comparing with unknown samples in wood libraries

d)

Using dichotomous key

38.

There are thousands of different extractives present in wood

a)

true

b)

false

39.

are substance contained in all species of wood and other plant tissues in varying amounts, that can be removed without affecting the cell wall composition by suitable solvent (e.g. hot water , toluene-ethanol, sodium hydroxide), steam distillation or natural or inflicted wounds

a)

Extractives

b)

water

c)

cellulose

d)

lignin

40.

is a hard, lustrous, yellow, brown or nearly white and more or less insoluble in solvents but is rendered soluble by melting prior to varnish manufacture, A resin exudates of Almaciga(Agathis philippinensis)

a)

manila copal

b)

balau

c)

manila elemi

d)

turpentine

41.

the most important Dipterocarp resin, a resinous oil obtained from Apitong (Dipterocarpus grandiflorus), and Panau (Dipterocarpus verniciflus) and a semilar resin from Palosapis (Anisoptera thurifera)

a)

balau

b)

gutta percha

c)

manila copal

d)

brea blanca

42.

it is secreted in the bark and oozes out from the trunk in the white masses of Piling liitan (Canarium luzonicum)

a)

manila elemi

b)

manila copal

c)

balau

d)

gutta percha

43.

are exudates obtained from coniferous trees

a)

turpentine

b)

balau

c)

manila copal

d)

hard resin

44.

is a mixture of fragrant, volatile compounds, named after the plant where it was derived.

a)

essential oil

b)

dye

c)

turpentine

d)

balau

45.

The cellubiose is the repeating unit from two glucose of opposite orientation to each other linked by

a)

β (1-4 ) linkage

b)

a (1-4 ) linkage

c)

gamma 1-4

46.

An enzyme found in termites, goat, carabao and cow .They have organism in their stomach who make and store this enzyme to degrade cellulose into glucose

a)

cellulase

b)

amylase

c)

ptyalin

d)

saliva

47.

Which of the following statement is incorrect about cellulose and hemicellulose?

a)

Cellulose is homopolysaccharide while hemicellulose are heteropolysaccharide.

b)

Cellulose has higher molecular weight than hemicellulose

c)

he Degree of Polymerization in cellulose is up to 10000 while only 200 in hemicellulose

d)

ellulose is a straight molecule while hemicellulose is branched

e)

Cellulose can be easily dissolved by different chemicals but hemicellulose cannot be easily dissolved using ordinary solvent

48.

The scientific name of the species producing Agarwood which is regarded as most expensive tree in the Philippines and its family

a)

Aquilaria malaccensis- Thymelaeaceae

b)

Aquilaria malacasis- Thymelaeaceae

c)

Aquilaria cumingiana- Myrtaceae

d)

Aquilaria cuminiana-Meliaceae

49.

Water passes through the _____ of the xylem

a)

vessels

b)

tracheid

c)

wood rays

d)

phloem

50.

the center part of the tree which contains a lot of starch

a)

pith

b)

pitch

c)

pit

d)

rays

51.

Growth in woody plants occurs in

a)

apical meristem in shoot tips and vascular cambium

b)

heartwood

c)

dead tree

52.

A diffuse porous wood

a)

mahogany

b)

narra

c)

teak

d)

gmelina

53.

The bamboo and coconut contains a lot of ___ that results to higher ash content if you burn their woods

a)

silica

b)

extractives

c)

water

d)

carbon

54.

It is the branch of forestry that deals with knowing the identity of the unknown wood by comparing the samples with an already known kind

a)

Wood Structure

b)

Wood Identification

c)

Plant Identification

d)

Taxonomy

55.

Draw anything that would remind you of this subject

Sansan1515

Total questions: 55

Worksheet time: 40mins

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