Sarpang
Lower Secondary School
Sarpang
Dzongkhag
Mid-term
Examination 2014
Subject:
Science Time:
2½ hours
Class: VIII Full Mark: 100
Section A
Directions:
Each question in this section is followed by four possible choices of
answers. Choose the most
correct answer and write it in the answer sheet.
[25]
1.
The whorl that provides protection and nutrition
to the flower
a)
Calyx b)
Petal c) Filament d)
Style
2.
When the fields are left uncultivated it is
known as
a) Fertilization b) Field fallowing c) Crop rotation d)Plant breeding
3.
During incubation, the eggs are kept warm at a
constant temperature of
a) 39⁰C b) 37⁰
C c) 39.5⁰
C d) 21⁰
C
4.
Swine fever is the disease suffered by
a) Cattles b) Pig
c) Chickens d) Plants
5.
The great variety of life on earth is described
as
a) Flora & Fauna b) Habitat c)Niche d)Biodiversity
6. The distance of the
principal focus from the optical centre of the lens is called
a) Focus b) Principle axis c) Focal length d) Optical centre
7.
A group of atoms which behave as a single unit
is called
a) Compound b) Element c) Radical d) Atomicity
8.
The symbol for nitrate is
a) NO2 b) NO3 c) N d) Na
9.
Zn + 2HCL
ZnCl2 + H2 is a
Zn + 2HCL
ZnCl2 + H2 is a
a)Displacement b)Combination c)Decomposition d)Double Displacement
Reaction Reaction Reaction Reaction
10. Valency
for Hydrogen
a) 11 b) 1 c)
2 d)
3
11. When
mixing two primary colours Green + Red,
you obtain Secondary colour as
a) Cyan b) Green c)
Red d)Yellow
12. Look at the diagram of the
prism and choose the correct answer
 |
Q Q R
P S
PQ in the diagram represents
a) Emergent ray b) Incident
ray c) Refracted ray d) Reflected ray
13. The
structural and functional unit of life
a) Cell b) organ c)
tissue d) Nucleus
14. Which
system is also known as the transportation system of the body
a) Nervous b) Circulatory b)
Excretory d) Reproductive
System system system system
15. Food
items containing fibrous parts, which cannot be digested
a) Proteins b) Carbohydrate c)
Water d) Roughage
16. Power house of the cell
a) Nucleus b) Cytoplasm c)
Ribosome d) Mitochondria
17. Fat
soluble vitamins are
a)Vitamin B and Vitamin C b)Vitamin A, Vitamin D,
Vitamin E & Vitamin K
c) Vitamin A and Vitamin B d) Vitamin D and Vitamin C
18. The first milk of the mother
is yellow in colour and it is known as
a) Colostrums b) Breast milk c) Yellow milk d) Mother’s milk
19. A metallic element X has valency 2. The formula for its Sulphate is
a) X(SO4)2 b)X2SO4 c)X3SO4
d)XSO4
20. Which
Lens is known as converging lens
a) Convex mirror b) Concave lens c) Convex lens d)Concave mirror
21. The
spectrum is formed because of
a) Reflection of light b)
Refraction of light
c) High speed of light d)
Dispersion of light
22. Di-atomic elements have
a) One atom in a
molecule b)
Two atom in a molecule
c) Three atom in a
molecule d) Four atom in a molecule
23. The replanting of trees
in the area after cutting down the matured trees is called
a) Afforestation b) Reforestation c) Deforestation d) conservation
24. The fusion of the sperm with the
ovum is called
a) Fertilization b) Hybridization c) Ovulation d) Reproduction
25. Non-striated muscles are
involuntary because they are
a) Spindle- shaped b)
Have no striations
c) Not under our control d) under our
control
Section
– B
Answer ALL the questions (75 marks)
Directions:
Read the questions given below carefully
and write your answer for each part in your answer sheet.
Question 26
a.
Choose the correct answer from the words given in brackets. Rewrite the correct
sentences.[5]
i.
…………………………. crops can
fix nitrogen in soil.( cash crops/ leguminous/fruit)
ii. A female pig is called
………………………..(sow/bore/mother pig)
iii. ………………… is the description
of how the organism relates to its physical and biological environment.
(adaptation/ niche/locomotion)
iv. BCG is a vaccine given for the
protection from……………(polio/tuberculosis/measles)
v. Deficiency
of Vitamin C will cause …………………..(night blindness/ rickets/Scurvy)
b. Match the most appropriate
item from Column A with of Column B and Write the correct pairs in
your answer sheet. [5]
Column A
Column B
|
a)
Conducts
message from one part to the human body to another?
|
i.
Copper T
|
|
b)
DMPA
|
ii.
Injectable
contraceptive
|
|
c)
OPV
|
iii.
Converging
|
|
d)
Cardiac muscles
|
iv.
Hepatitis B
|
|
e)
Concave mirror
|
v.
Diverging
|
|
|
vi.
Poliomyelitis
|
|
|
vii.
Heart
|
|
|
viii.
Nervous tissue
|
Question 27
a. State True OR False for each of the following [5]
i.
Particular stage at which the body starts
changing prepares for reproduction is called puberty ( )
ii.
The molecular formula for Sodium Sulphite is Na2SO4
( )
iii.
Male reproductive organ of a flower is carpel
( )
iv.
Brown Swiss in fawn in colour, short dished
face, smaller than Jersey ( )
v.
Rubber comes from trees ( )
b. Short Answer Question
i.
Write
down TWO advantages of vegetative propagation? [1]
ii.
Why is a tray of water kept at the bottom of the
incubator [1]
iii.
Write Four ways to conserve the forest [2]
iv.
List three main elements that constitute the
bulk of protoplasm [1]
Question 28
a.
What is meant by balance diet? [1]
b.
What would be the symptoms of the deficiency of
the following elements in plants?[2]
i. Nitrogen
ii. Phosphorus
iii. Potassium
c.
Why is silage a better feed for cattle than hay
[1]
d.
Identify the type of reaction [1]
i.CaCO3 + H2O +
CO2 Ca(HCO3)2 ( )
ii.NaCl + AgNO3 AgCl + NaNO3 ( )
e.
The diagram below shows a formation of
image by convex lens when the object
is placed between F1 and 2F1.
i.
Copy and complete the diagram given
below [1]
ii.
Write two characteristics of the image
formed [1]
iii.
State one use of a convex lens [1]
f. Which
organelle in a cell is the most important and why? [2]
Question 29
a) Why do
we prefer new breed pigs to local breed? Give two reasons. [2]
b) Write
the molecular formula for the following [2]
i.
Calcium chloride
ii.
Magnesium Hydroxide
c) What
are bones made of? [1]
d) What
is meant by dispersion of light? [1]
e) Complete
the table below [4]
|
Organ system
|
Organ or parts of system
|
Function of the system
|
|
i.Integumentary
|
Skin
|
|
|
ii.
|
Bone & cartilage
|
Gives support and shape to our
body
|
|
iii.
Respiratory
|
|
-
Takes in oxygen
-
Oxidation of food to release
energy carbon dioxide and water.
|
|
iv.
|
|
- to produce reproductive
cells
- to produce new individuals
so that species does not become extinct
|
Question 30
a)
Name one common disease of cattle [1]
b)
Draw and label the different parts of flower [4]
c)
Why is convex mirror
used as rear-view mirrors of vehicles? Justify your answer with the diagram.[2]
d)
Complete the given
table [1]
|
Vitamin
|
Food
Source
|
Deficiency
Disease
|
|
|
Fish,
liver, butter,cheese,milk
|
Rickets
|
|
|
Carrot,
liver, milk, papaya
|
Xerophthalmia
|
e)
Balance the following chemical equation [2]
i. Cu
+ O2 CuO
ii. Al
+ Cl2 AlCl3
Question 31
a)
Marasmus is a disease in children caused by
deficiency of proteins, carbohydrates and fats. Write two symptoms of marasmus
[2]
b)
If a radius of curvature is 8cm, find out the
focal length of the spherical mirror [2]
c)
Write two differences between a compound and
mixture [2]
d)
Write two differences between convex lens and concave
lens [2]
Question 32
a)
Write two factors affecting pasture development
[1]
b)
Complete the following chemical equation [3]
i.
Cu(OH)2
………………………. + H2O
Cu(OH)2
………………………. + H2O
ii.
NaOH + HCL
NaOH + HCL
iii.
………… + ………… 2MgO
………… + ………… 2MgO
c)
Write the symbol for the following element[3]
i.
Silver
ii.
Potassium
iii.
Lead
iv.
Mercury
v.
Sulphur
vi.
Sodium
Question 33
a)
What are the different signs of secondary sexual
characteristics in women? [2]
b)
Differentiate between temporary and permanent
method of family planning? [2]
c)
Name the seven deadly childhood diseases [2]
d)
Why is it not advisable to get pregnant before
the age of 18 years? [1]
e)
Write down the signs of pregnancy? [2]
f)
Weeding is an important part of farming. Why?
[1]
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