Annual Examination 2020
Class
: 8 Subject :science Time: 03:00 Hour
General
Instructions:
·
The
question paper comprises of three sections – A,B,C and D .You are to attempt
all the questions
·
Question
numbers 1,2 and 3 in section-A are one mark questions .They are to be answered
in one word or one sentence.
·
Question
number 4 in section-B is two marks questions .They are to be answered in 30
words each.
·
Question
number 5 in section-C is three marks questions .They are to be answered in 30
to 50 words each.
·
Question
number 6 in section-D is five marks questions .They are to be answered in 50 to
100 words each.
Section-A
1. Choose
correct answer from the given options: 1×10=10
i.
Separation of grains from the chaff
is called
(a) winnowing
(b) harvesting (c) separation (d) threshing
ii.
Which one of the following is not
an example of fungus
(a) spirogyra(b)
yeast (c) mould (d) mushroom
iii.
Which one of the following is a
polyester fibre
(a)
rayon (b) terylene (c) nylon (d) acrylic
iv.
Which one of the following is a
non-metal element
(a)
mercury (b) water (c) sulphur (d)
carbon-di-oxide
v.
A non luminous flame appears
(a)
red (b) blue (c) white (d) pink
vi.
Which one of the following is not a fuel
(a)
glycerene (b)
CNG (c) LPG (d) kerosene
vii.
The longest cell in the human body is
(a)
a nerve cell (b) a
muscle cell (c) a white blood cell (d)
both nerve cell and muscle cell
viii.
The list of threatened species of the
world is stored in the
(a)
blue data book (b) threatened species
book (c) red data book (d) green data
book
ix.
fertilization takes place in the
(a)
fallopian tube
(b) uterus (c) ovary
(d) cervix
x.
20.95% of the air is
(a)
carbon-di-oxide (b) oxygen
(c) nitrogen (d) sulphur
2. Fill
in the blanks: 1×5=5
i.
Scattering of seeds randomly in the field
is known as ……
ii.
Terylene blended with cotton is called
……
iii.
Coke is obtained from ………….
iv.
………. are the units of heredity.
v.
Thyroxine hormone is secreted by …..
gland .
3. Write
answers in very short: 1×5=5
i.
What are the kinds of friction?
ii.
What is the SI unit of frequency?
iii.
Name the outermost layer of the earth.
iv.
Define light year.
v.
Name two pollutants of air pollution.
Section-B 2×11=22
4. Write
short answers for following:
i.
Write two beneficial uses of bacteria.
ii.
Define man-made fibres .Give examples.
iii.
Define global warming.
iv.
Write two functions of cell membrane.
v.
Write two effects of force.
vi.
Write two ways to reduce friction.
vii.
Explain one characteristic of
vibrations.
viii.
What are conductors .Give example.
ix.
List two uses of gold leaf electroscope.
x.
Write two differences between artificial
satellite and natural satellite.
xi.
Write two harmful effects of water
pollution.
Section-C 3×6=18
5. Answer
the following short answered questions:
i.
Name the physical properties of
metals .Briefly explain any one of them
ii.
What are the necessary conditions
required for combustion .
iii.
What do you mean by AIDS ?Briefly
explain.
iv.
Write two examples of pressure in
everyday life.
v.
What are constellations ?Write name
of some constellations.
vi.
What do you mean by dispersion of
light ?Draw diagram to explain your answer.
Section-D
5×4=20
6. Answer
the following long answered questions:
i.
Briefly explain: threatened
species, endangered species and vulnerable
species.
ii.
Explain life cycle of a frog.
iii.
Draw a labelled structure of human
ear and explain.
iv.
Draw a labelled structure of human
eye and explain.
___________________________________End
of The Paper_________________________
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