Ministry of Education
DZONGKHAG COMMON EXAMINATION
-2017
Class:
VII
Subject: Science
Full
Mark: 100
Time: 2hrs
Section A
QUESTION 1
Direction:
Choose the most correct answer and write in the answer sheet. Writing of
numbers and copying of incomplete answers will not be awarded marks.
1. Cell
sap is found in...................
a) Nucleus
b) Plastids
c) Vacuole
d) Cytoplasm
2. Wangmo
has been a heavy smoker for the last five years. Which one of Wangmo’s systems
may be affected by smoking?
a) Nervous
b) Respiratory
c) Circulatory
d) Reproductive
3. An
example of a micronutrient is..................
a) Phosphorus
b) Manganese
c) Potassium
d) Magnesium
4. The
beak of humming bird is long and slender. This allows the bird to feed on
nector from deep inside the flowers. This is an example of.............
a) Extinction
b) Competition
c) Adaptation
d) Variation
5. Study
the elements as shown in the box below. We can conclude that the elements are
arranged in the increasing order of...........
a)
Atomic
size
b)
Atomic
mass
c)
Atomic
number
d)
Molecular
weight
6.
The
movement of particles from the region of higher concentration to the region of lower
concentration is called..................
a)
Osmosis
b)
Diffusion
c)
Gas
pressure
d)
Expansion
7.
If
the amount of solute dissolved is less or more in a given volume of solvent,
the solution can be classified as either...............
a)
Dilute
or concentrated solution
b)
Aqueous
or non aqueous solution
c)
Saturated
or unsaturated solution
d)
Homogeneous
or heterogeneous solution.
8.
A
mixture contains two liquids A and B. Liquid A has boiling point of 1000C
and liquid B has boiling point of 800C. Which technique is used to
separate the two liquids?
a)
Distillation
b)
Chromatography
c)
Filtration
d)
Fractional
distillation
9.
Which
of the following is the correct chronological order of scientists credited with
developing of modern periodic table?
a)
Moseley,
Dobereiner, Newlands, Mendeleev
b)
Mendeleev,
Moseley, Dobereiner, Newlands
c)
Dobereiner,
Newlands, Mendeleev, Moseley
d)
Newlands,
Mendeleev, Moseley, Dobereiner.
10. A
mechanic wants to test the strength of the car battery acid. Which of the following
indicators would give him the best result?
a)
Methyl
orange
b)
Universal
c)
Litmus
solution
d)
Magnesium
ribbon
11. Distance and displacement are equal to
each other if the body moves along
a)
A
circular path
b)
An
elliptical path
c)
A
straight path
d)
A
Curved path
12. Most of the people in Bhutan visit
Gelephu and Gasatsachu (hot spring). Indentify the type of energy resource
present in these two places?
a) Geothermal
b) Fossil
fuel
c) Biomass
d)
Hydro
energy
13. A
girl pulls off her sweater over the head. Her hair gets attracted to the
sweater due to..........
a) Magnetic
force
b) A
heat transfer
c) Chemical
change
d)
An
electrical charge
14. Which sequence of energy transformation
occurs when a torch is turned on?
a)
Chemical light electrical
b)
Chemical electrical light
c)
Electrical chemical light
d)
Electrical light chemical
15. If the effort arm is longer than the
Load arm in lever, then the
a) MA
is less than 1
b) MA
is equal to 2
c) MA
is equal to 1
d)
MA
is always greater than 1
16. Which of the following is only the
characteristic of image formed by convex mirror?
a)
Real
b)
Virtual
c)
Inverted
d)
Same
size
17. “This heavenly body is made up of ice
and dust, and when it comes near the sun, melts forming glowing tail.” The
statement given above best describes about...........
a)
Asteroids
b)
Meteoroids
c)
Comets
d)
Meteorite
18. The number of pairs of ribs present in
human body.
a)
10
b)
12
c)
24
d)
36
19. The red colour of a rose is due to the
presence of..................
a)
Cellulose
b)
Leucoplast
c)
Chloroplast
d)
Chromoplast
20. Characteristics given below shows the
occurrence of physical change EXCEPT
a) Composition
changes
b) Mass
does not change
c) Composition
remains same
d)
Form
remains same
21. Which one of the following is NOT
a heterogeneous mixture?
a)
Cake
b)
Juice
c)
Concrete
wall
d)
Emadatsi
22. 
Study
the wave pattern given below.
Study
the wave pattern given below.
The above diagram represents the
wave pattern of
a) With
high pitched sound
b) Is
a loud sound
c) Is
a noise
d) Is
a softer sound
23. Seed dormancy allows the seed to
a)
Store
food
b)
Develop
healthy seeds
c)
Prevent
the seed from becoming rotten
d)
Overcome
unfavourable climatic condition
24. During summer snakes are found
abundantly in hot places but hardly any in winter because they undergo
a)
Aestivation
b)
Hibernation
c)
Adaptation
d)
Evolution
25. The diagram below represents three
identical bulbs connected to a cell. Study the diagram and answer.
Which ONE of the following
statements is true?
a) The
current in bulb 1 is greater than the current in bulb 2
b) The
current in bulb 1 is greater than the current in bulb 3
c) The
current in bulb 2 is the same as the current
in bulb 3
d) The
current in bulb 2 is the same as the current in bulb 1
QUESTION 2
Direction: Fill in the blanks with an appropriate
words [10X1]
1. An
electric charge developed due to the friction when two objects are rubbed
together is called ________________electricity.
2. A
solution which dissolves no more solute at a particular temperature is called
a___________solution.
3. Animals
like bat and dolphin make use of ______________ sound to catch their prey.
4. Hydrogen
ion (H+) from an acid reacts with hydroxyl ion (OH-) from
base to form water. This reaction is called_________________ reaction.
5. The
small opening in leaf through which carbon dioxide diffuses______________.
6. The
common symptoms of _____________ disease are fever, cough, sputum containing
blood, pain in the chest, loss of weight, loss of appetite and tiredness.
7. Inorganic
acids are obtained from________________.
8. When
the moon lies between sun and earth, the type of eclipse that will occur is
_____________
9. The
ray of light that bounces back from the surface of the shiny steel plate is
known as_______________.
10. The
substance that indicates acidity or alkalinity...........................
QUESTION 3
Direction: Write TRUE or FALSE against the given
statements. Correct the false statements. [10X1]
1. Global
warming has lots of impact on life of animals and plants on earth.
2. Fossil
fuels are formed due to the action of heat and pressure on the buried dead
bodies for millions of year.
3. Clavicle
is known as shoulder bone.
4. The
smallest unit of the nervous system is known as Neuron.
5. Lithium,
sodium and Potassium are metals of same group, but different period.
6. The
elements that has both properties of metals and non metals is called alloy.
7. Dema
cuts an apple into two halves, which turns brown after sometime. The colour
change is an example of physical change.
8. The
single fixed pulley helps to multiply the forces.
9. Photosynthesis
provides food and oxygen to all living organisms.
10. The
substance present in the cell wall is protein.
QUESTION 4
Direction: Match
the items of Column A with correct answers of column B. [10X1]
|
Column A
|
Column B
|
||
|
1
|
Bats
detect the obstacles in their path using
|
A
|
radicle
|
|
2
|
Carbon
dioxide test
|
B
|
Zero
displacement
|
|
3
|
Root
system
|
C
|
g/cm3
|
|
4
|
A
curry cooker
|
D
|
Wood
ash
|
|
5
|
The
terminal ends of respiratory system
|
E
|
Ultrasonic
sound waves
|
|
6
|
Potassium
|
F
|
Artificial
satellites
|
|
7
|
Provides
useful information for the study of climate change
|
G
|
Cannot
travel through vacuum
|
|
8
|
Sound
|
H
|
Lime
water
|
|
9
|
A
boy completing a 200m race in a circular track
|
I
|
Alveoli
|
|
10
|
Density
|
J
|
Electrical
energy to heat energy
|
Section B
QUESTION 5
a) Draw
a labelled diagram of plant cell? [3]
b) Vitamins
are more important than carbohydrates. Do you agree? Justify. [2]
c) The
diagram below shows the human reproductive system. Study it carefully and answer
the following questions.
i.
In which label does the
development of embryo takes place?[1]
ii.
Write the function of
the part labelled B?[1]
iii.
Name the organ system.
[1]
iv.
What would happen if
part labelled A is cut off? [1]
QUESTION 6
a) Deer
and goat look similar, but they do not belong to the same species. Why? [2]
b) A
man pushes a table with a horizontal force of 250N. How much work is done in
the moving the table through a distance of 50m? [2]
c) Draw
the ray diagram and list down the characteristics of the image formed by
concave mirror, when object is placed at principal focus? [5]
QUESTION 7
a) What are artificial satellites?[1]
b) List the characteristics of the chemical change. [3]
c) Write down the symbols for the following elements.
Sort them as metals and non-metals.[4]
i)
Zinc
ii)
Copper
iii)
Oxygen
iv)
sodium
d) Define
Density? [1]
QUESTION 8
a)
Calculate
b)
the relative density of the copper whose density is 8.9g/cm3,
if the reference material is water? [2]
c)
Filtration is better method of separating an insoluble solid components
compared to decantation. Give reason. [2]
d) Differentiate
between Epigeal and hypogeal germination with example?[2]
e) Draw
the circuit diagram using symbols in measuring current and voltage in series circuit.
[4]
Question
9
a)
What is magnetic Induction? [1]
b)
A few drops of universal indicator are added to a colourless liquid. The
strength of this liquid is found to be 9.
i)
What happens if you add a few drops of phenolphthalein to this liquid?[1]
ii)
What information is indicated by the pH number of the colourless
liquid?[1]
iii)
What is the function of the universal indicator?[1]
c)
Water freezes in cold places in winter. Give reason. [2]
d)
As a responsible citizen, suggest some ways of how you can contribute
towards minimizing the factors causing global warming. [2]
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