NCERT Class 9 Science
Sample Paper 3
MAX. MARKS : 80 DURATION : 3 HRS
General Instructions:
Ø The
question paper comprises of five sections – A, B, C, D and E. You are to
attempt all the sections.
Ø All questions are compulsory.
Ø Internal choice is given in sections B, C, D and E.
Ø Question numbers 1 and 2 in Section - A are one mark
questions. They are to be answered in one word or in one sentence.
Ø Question numbers 3 to 5 in Section - B are two marks
questions. These are to be answered in about 30 words each.
Ø Question numbers 6 to 15 in Section - C are three
marks questions. These are to be answered in about 50 words each.
Ø Question numbers 16 to 21 in Section - D are 5 marks
questions. These are to be answered in about 70 words each.
Ø Question numbers 22 to 27 in Section - E are based on
practical skills. Each question is a two marks question. These are to be
answered in brief.
SECTION – A
1. Draw
a displacement-time graph for a body moving with uniform velocity.
2. Identify
the kind of energy possessed by a running athlete.
SECTION – B
3. (a)
What are concentrates in animal feed?
(b) Name two internal parasites that cause
diseases in animals?
OR
What
is mixed farming? How does it help a farmer?
4. Name
the abiotic factors responsible for the damage of food grains during storage.
5. (a)
State the principle on which the working of a hydrometer is based.
(b)
A sharp knife is more effective than a blunt knife. Why?
SECTION – C
6. (a)
Which is greater, the attraction of the earth for 1 kg of iron or the
attraction of 1 kg iron for the earth? Why?
(b)
A boy throws a ball vertically upwards and catches it back in 10 s. Calculate
(i)
the velocity with which it was thrown up
and
(ii)
maximum height attained by the ball. (Take
g = 10 m/s2)
7. A
circular track has a circumference of 3140 m with AB as one of its diameter. A
scooterist moves from A to B along the circular path with a uniform speed of 10
m/s. Find
(a)
distance covered by the scooterist,
(b)
displacement of the scooterist, and
(c)
time taken by the scooterist in reaching
from A to B.
8. How
are Phanerogamae divided into sub-divisions?
OR
What
is the difference between plasma membrane and cell wall? Give the functions of
each one.
9. Navin
travels along a straight road 500 m long and returns back 100 m. Find his
average speed and average velocity if he takes a time of half an hour.
OR
The
brakes applied to a car produce an acceleration of 6 m/s2 in the opposite
direction to the motion. If the car takes 2 s to stop after the application of
brakes, calculate the distance it travels during this time.
10.
(a) Write two points of difference
between nuclear region of a bacterial cell and nuclear region of an animal
cell.
(b)
Which structure present in the nuclear
region of a living cell bear genes?
11.
(a) Why are liquids and gases called
fluids?
(b)
Why are aquatic species more comfortable
in cold water than hot water?
(c)
Why do we feel more cold after taking bath
with hot Water than cold water?
12.
List any three properties on the
basis of which a colloidal solution can be differentiated from true solution
and suspension.
OR
An
atom of an element has 7 electrons in its L shell.
(a) What is its atomic number? (b) State its valency. (c) Identify the
element.
13.
(a) What is meant by saturated
solution?
(b)
Calculate mass of glucose to be dissolved
to prepare 200 g of 5% solution of glucose bymass.
14.
Ayushman was watching his favourite
TV show on a Sunday morning when his mother was cooking food. His mother
noticed that the garbage bin had become full and asked Ayushman to empty the
content in the public garbage bin. Since the public bin was located little far,
Ayushman emptied all the content of this bin in the drain just in front of his
house and rushed back home to watch his favourite TV show. His friend Aryaman
who was disposing garbage at the public bin, noticed the act of Ayushman. He
therefore went to meet Ayushman and explained him the problems, the society may
face due the his way of garbage disposal.
(a)
Whose act of disposal of garbage is
appreciable. Ayushman or Aryaman?
(b)
What problem can Ayushman’s way of
disposal of garbage do to the society?
15.
(a) What is soil erosion? Give two
methods of reducing it.
(b)
Name two biologically important compounds
that contain both oxygen and nitrogen.
SECTION – D
16. (a)
While verifying the law of conservation of mass, a student carried out a
reaction between sodium chloride and silver nitrate in a conical flask. Name
the compound which will form as precipitate.
(b)
Define formula unit mass of a compound. Calculate the formula unit mass of the
following compound:
(i)
Na2CO3.10H2O (ii) CuSO4 [At. mass
of Na = 23, C = 12, O = 16, Cu = 63.5, S = 32 u] (c) What is meant by unified
mass.
OR
(a)
State one similarity and one difference
between evaporation and boiling.
(b)
Account for the following:
(i)
We wear cotton clothes in summer.
(ii)
A wet handkerchief is placed on the
forehead of a person suffering from high fever.(iii) Wet clothes dry slowly
during rainy season.
17.
(a) Why was gold foil chosen by
Rutherford instead of any other metal?
(b)
An ion M2+ contains 10
electrons and 12 neutrons. What is its atomic number and mass number of element
M?
(c)
What do you understand by valence
electrons?
(d)
Define isotopes. State two properties of
isotopes.
18.
(a) Name the property of bodies to
resist a change in their velocity. (b) What is the relationship between force
and acceleration?
(c)
What name is given to the product of mass
and velocity of a body?
(d)
Which physical quantity corresponds to the
rate of change of momentum?(e) Name the principle on which a rocket works.
OR
(a)
The stone is dropped from a tower of 500 m height into a pond of water at the
base of the tower. When is the splash heard at the top? (given g = 10 m/s2
and speed of sound = 340 m/s) (b) How do the sound waves cause vibrations in
the eardrum of human ear?
19. (a)
What do you mean by acceleration due to gravity?
(b)
Prove that acceleration due to gravity is independent of mass of the falling
body. (c) List two differences between ‘G’ and ‘g’.
20.
Differentiate between striated,
unstriated and cardias muscles on the basis of their structure and site
location in the body.
21.
State the conditions responsible for the
spread of malaria and measures to prevent and control it.
OR
A
person is suffering from chest pain, breathlessness, loss of body weight,
persistent cough and produces blood stained sputum.
(a)Name
the disease and its causative agent.
(b)
Mention two means of its transmission.
(c)Name
the vaccine used to prevent this disease.
(d)
Who discovered the causative agent of
disease?
SECTION – E
22.
What
happens when magnesium ribbon burns in air? Write the nature of product formed.
How will you test it.
OR
What
mass of sodium sulphate will react with 5.22 g of Barium chloride to produce
6.10 g of sodium chloride and 2.8 g of barium sulphate? Name the law which
govern your answer. Write the balanced chemical equation.
23.
Give one precaution for each in
determining melting and boiling point of water.
24.
On what factors does buoyant force
exerted by a fluid depend and how?
25.
State the laws of reflection of
sound.
OR
“The
disturbance created by a source of sound in the medium travels through the
medium and not the particles of the medium.” Justify this statement.
26.
Give
any two characteristics of bony fish on the basis of which it is placed in
class Pisces.
OR
Give
the main differences between Bryophyta and Pteridophyta.
27.
Give
any two points of differences between dicot and monocot plants.
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