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Science Writing Time :
2 Hours
Total Marks : 100
READ THE FOLLOWING DIRECTIONS CAREFULLY:
1.
In this
booklet, you will find 25 questions in Section A and 5 questions in
Section B.
You must answer all the questions. Each
question in Section A is worth 2
marks.
2.
All answers for Section ‘A’ and ‘B’ must be written in the answer sheets
provided
by the school.
3.
Do not start
writing the answers to questions until you are given permission to do so.
4.
You will have 2 hours in which to answer all the
questions.
5.
Once the examination begins, you will not be allowed
to ask questions, speak with
others or move around.
6.
If you finish before the time is over, close the
answer sheets, and sit quietly.
You are allowed to leave the examination
room ONLY half-an-hour before the
completion of the stipulated time of the
paper.
IF YOU HAVE ANY QUESTIONS, ASK THEM NOW!
TURN PAGE
(15 Minutes is to be allowed for reading as well as for teachers
on duty to explain the instructions)
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SECTION A
25
Questions – 50 Marks
Answer
ALL questions
Direction:
Each question in this section is followed by four possible choices of answers.
Choose the most correct answer and write it down in the answer sheets
provided by the school.
1. Which one of the following objects is the
best conductor of electricity?
A pencil
B paper
C water
D nail
2. The letter ‘X’ in the table given below best
represents
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Property
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Hard
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Transparent
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Opaque
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Example
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stone
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‘X’
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wood
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A oil.
B glass.
C paper.
D plastic.
3. Study the diagram given below carefully.
The kind of force shown in the above diagram is
A compressive
force.
B elastic
force.
C tensile
force.
D shear
force.
4. Stamen is the male part of the flower. It
is made up of the
A stigma
and style.
B anther
and stigma.
C ovary
and filament.
D anther
and filament.
5. Which of the following is the correct
match?
A soda →
acidic
B lemon
→ alkaline
C antacid
→ alkaline
D toothpaste
→ acidic
6. Which of the following bulbs will light?
A I
B II
C III
D IV
7. ‘Sugar
dissolves in water to form a sugar solution’. The solute in the solution is
A water.
B sugar.
C milk.
D salt.
8. What is the function of the twisted bundles
in an egg?
A It provides air to the growing chick.
B It
protects the inner part of the egg.
C It
holds the inner part of the egg.
D It
holds the yolk in position.
9. The following diagram shows a ‘Single
Touch Method’ of making a magnet out of a nail.
The end ‘B’ of the nail will be
A both north and south
seeking.
B south seeking.
C north seeking.
D neutral.
10. Lhakpa made a swing from a branch of a tree as shown
in the following diagram.
The same idea can be used to make
A a
steel bridge.
B an
arch bridge.
C a cantilever
bridge.
D a suspension
bridge.
11. Dawa made a
simple catapult out of an elastic band. He tested the strength using paper
pellets and recorded the result as given below.
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Elastic band pulled/stretched
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Distance travelled by paper pellet
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2 cm
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11 cm
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4 cm
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22 cm
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6 cm
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?
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8 cm
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44 cm
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What distance would the paper pellet travel if the elastic band is
pulled 6 cm?
A 55 cm
B 33 cm
C 25 cm
D 18 cm
12. When the span of the arch is shorter, its
strength will be
A none of the above.
B stronger.
C weaker.
D same.
13. Which of the objects given below will float?
A I
B II
C III
D IV
14. Burning of a candle is a chemical change
because
A the substance does not
remain the same.
B the substance remains
the same.
C no new substance is
formed.
D the shape has changed.
15. Triangles are used in steel bridges
because they
A are strong.
B look
beautiful.
C are
easy to make.
D can
form different shapes.
16. The following are the ways to increase
the strength of a magnet using battery EXCEPT
A using a new nail.
B using a rusted nail.
C using more batteries.
D increasing the turns
of the wire.
17. Which statement below shows the
similarity between respiration and burning?
A Both use energy.
B Both use oxygen.
C Both use carbon
dioxide.
D Both are physical
changes.
18. Given below is the Growth Chart of baby Wangmo.
What caused Wangmo’s graph to go down after one year?
A She started eating
solid food.
B She suffered from
sickness.
C She gained weight.
D She was healthy.
19. We
can find out how far the storm is by counting the number of seconds between
the flash of lightning and thunder. (For
every 3 seconds the storm is 1 km away.)
How far away is the storm if the thunder is heard 35 seconds after the
lightning?
A 106.6 km
B 105.6 km
C 35.6 km
D 11.6 km
20. Evaporation
helps us in many ways. Which of the following is NOT TRUE about evaporation?
A Sweating to keep cool.
B Drying meat for future
use.
C Storing water in a
plastic bottle.
D Keeping water in an
earthen pot.
21. Study the following diagram
carefully.
The above set-up was kept in the sun. After one hour, oxygen bubbles
were seen. These are
produced by the
A heat from the sun.
B evaporation of water.
C respiration of the
water plant.
D photosynthesis of the
water plant.
22. Yeast powder is
added to cooked grains and kept in a warm place because the yeast
A needs
more oxygen.
B is a micro organism.
C will
respire at a faster rate.
D will
respire at a slower rate.
23. Here are four statements of the movement of water
through plants. They are in the WRONG
order.
I
Water is pulled up through the roots and trunk.
II
Water is taken in by the roots.
III
Water evaporates from the leaves.
IV
Water passes along the veins in the leaves.
The correct order of the process is
A I, II
IV, III.
B I, IV,
III, II.
C II, I,
IV, III.
D II, I,
III, IV.
24. The experiment given below is to see
whether voltage affects the brightness of a bulb.
Everything should be kept the same for each test EXCEPT the
A number
of batteries.
B length of the wire.
C kind of paper .
D type of bulb.
25. The best food for a new born baby is
breast milk because it
I. contains all the nutrients.
II.
helps to protect from diseases.
III.
is sweet and tasty.
Which of the following is true?
A I
only
B II only
C I
and II
D II
and III
SECTION B
5 Questions – 50 Marks
Answer
ALL questions
Direction:
Answer the questions given below as directed. All answers must be written in
the answer sheets provided by the school. The
intended marks for each question is given
in brackets [
].
Question 26
(a) Fill in the blanks. [5]
(i) Gases
and liquids are …………………
(ii)
The magnetic force is stronger at the
………….. of the magnet.
(iii)
The baby plant in a seed is called
…………….
(iv)
The shape of an egg is an example of an
……………
(v)
The group of colours in a rainbow is
called ……………….
(b)
Study the model of a bridge given below and answer the
questions that follow.
(i) Name the type of bridge shown in the above diagram. [1]
(ii)
State TWO ways of making the bridge stronger. [2]
(c) Look at the
diagram given below and name the parts 1 and 2. [2]
Question 27
(a) Match the following by choosing the words
from the box. Rewrite the correct
matching pairs. [5]
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Column A
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Column B
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1. Garbage pit
2. Bulb
3. Hinge joint
4. Sugar
5. Habitat
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(b) Answer the following questions.
(i) What
is voltage? What is it measured in?
[2]
(ii) What
is the change of state from gas to liquid called? [1]
(iii)
What happens to your breathing rate
after exercise? Why? [2]
Question 28
(a) State whether the following sentences are TRUE or FALSE. [5]
(i) Rubbing the comb on the
hair produces current.
(ii)
The bulbs in parallel connection will
have equal brightness.
(iii)
Clothes dry more quickly in a windy
place.
(iv)
The seeds of dandelions are scattered
by animals.
(v)
The arrow head of the compass always
points south.
(b) Answer the following questions.
(i) Given
below is a food chain. Copy and fill in the boxes with neat diagrams of
animals to complete it. [2]
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MAIZE SNAKE
(ii) Why
is an electric bulb made of glass? [1]
(iii) Write
ONE use of a magnet. [1]
(iv) At what time of the day is the shadow shortest?
[1]
Question 29
(a) Copy
and rearrange the life cycle of a frog in the flow diagram given below. [2]
·
Adult frog
·
Fertilization in the water
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Eggs hatch into tadpoles
(b) What do
you understand by the following terms? [3]
(i) Switch
(ii)
Germination
(iii)
Matter
(c) (i) Write ONE difference between renewable and non-renewable sources of energy.
Give ONE example each. [2]
(ii)
Why are bamboo poles used at construction
sites? [2]
(iii) How can dzongs and flag poles be made more
stable? [1]
Question 30
(a) The
flow chart given below shows the preparation of suja (butter tea). Use the processes
given in the box to complete it. [3]
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ü Churn the mixture.
ü Boil the tea leaves.
ü Filter the mixture.
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(b) (i) Why does a ship float on water while a
pin sinks? [2]
(ii) It
is not a good method to dry meat near the latrine. Why? [2]
(iii) When
is the best time to clean your teeth? Why? [2]
(iv) Why
are paper clips used for making switches? [1]
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