Class 9 Sample Paper Science (Half Yearly)

SAMPLE
PAPER
Half Yearly Examination

Prepared For
NCERT BASED SYLLABUS
Applicable For
CBSE BOARD AND STATE BOARD USING NCERT

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HALF YEARLY EXAMINATION
SAMPLE QUESTION PAPER

Class - IX Subject – Science
Time – 3 Hours Maximum Marks- 80

General Instructions:
(i) The question paper comprises four sections A, B, C and D. All questions are compulsory.
(ii) Section–A contains multiple choice questions (MCQs), very short answer questions and
assertion - reason type questions carrying 1 mark each. Answers to these should be given in
one word or one sentence.
(iii) Section–B are short answer type questions, carrying 2 marks each. Answers to these questions
should be in the range of 30 to 50 words.
(iv) Section–C are short answer type questions, carrying 3 marks
each. Answers to these questions should be in the range of 50 to 80 words.
(v) Section–D are long answer type questions carrying 5 marks each. Answer to these questions
should be in the range of 80 to 120 words.
(vi) There is no overall choice. However, internal choices have been provided in some
questions. A student has to attempt only one of the alternatives in such questions.
(vii) Wherever necessary, neat and properly labeled diagrams should be drawn.

PHYSICS
SECTION -A

1. What is the quantity measured by slope of velocity- time graph? [1]

2. An athlete completes one round of circular track of diameter 200 m in 40 s. What is the distance
covered at the end of 2 minutes and 20 seconds? [1]

3. Draw velocity-time (v-t) graph for a body falling freely under the effect of gravity (take upward
direction as positive and downward as negative). [1]

4. A mass of 5 kg is acted upon by force of 2 N, starting from the rest how much distance is
covered by mass in 10 s? [1]

5. Write the importance of universal law of gravitation. [1]
OR

State Newton’s universal law of gravitation.

6. What is the numerical value of universal gravitational constant? Write its SI unit. [1]

7. Read the following and answer any four questions from 7 (i) to 7 (v) [1 x4=4]

Suppose the boy first runs a distance of 100 metres in 50 seconds in going from his home to the
shop in the East direction, and then runs a distance of 100 metres again in 50 seconds in the
reverse direction from the shop to reach back home from where he started.

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(i) Find the speed of the boy:-
(a) 1 m/s (b) 2 m/s (c) 3 m/s (d) none of these

(ii) Find the Velocity of the boy:-
(a) 1 m/s (b) 2 m/s (c) 3 m/s (d) 0 m/s

(iii) Which graph represents the motion of this boy:-

(iv) Suppose in given case if the boy drives from home to shop with a uniform speed of
30km/h and return from shop to home with a speed of 20 km/h. Then his average
speed is: -
(a) 24 km/h (b) 20 km/h (c) 36 km/h (d) 18 km/h.

(v) Which of the following statement is correct regarding velocity and speed of a
Moving body?
(a) Velocity of a moving body is always higher than its speed
(b) Speed of a moving body is always higher than its velocity
(c) Speed of a moving body is its velocity in a given direction
(d) Velocity of a moving body is its speed in a given direction

8. Read the following and answer any four questions from 8 (i) to 8 (v) [1 x4=4]
The first law refers to the simple case when the net external force on a body is zero. The second
law of motion refers to the general situation when there is net external force acting on the
body. It relates the net external force to the acceleration of the body. These qualitative
observations lead to the second law of motion expressed by Newton as follow:

The rate of change of momentum of a body is directly proportional to the applied force and
takes place in the direction in which the force acts. Thus, if under the action of a force F for
time interval Δt, the velocity of a body of mass m changes from v to v + Δv i.e. its initial

velocity.

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p = m v changes by Δp = mΔv. According to the Second Law , F = ∆P/∆t. And F = ma, where
a is acceleration of body. In the second law, F = 0 implies a = 0. The second law is obviously
consistent with the first law [1x4=4]

(i) SI unit of force is-
(a) kg m/s2
(b) kg2m2/s
(c) kg/m2s2
(d) None of these

(ii) A batsman hits a cricket ball which then rolls on level ground. After covering a short
distance, the ball comes to rest. The ball slows to a stop because –
(a) The batsman did not hit the ball hard enough.
(b) Velocity is proportional to the force exerted on the ball.
(c) There is a force on the ball opposing the motion.
(d) There is no unbalanced force on the ball, so the ball would want to come
to rest..

(iii) If the mass of a body is doubled and its velocity becomes half, then the linear momentum
of the body will
(a) remain same
(b) become double
(c) become half
(d) become four times.
(iv) A force of 25N acts on a mass of 500g resting on a frictionless surface. The acceleration
produced is -
(a) 40 m/s2 (b) 60 m/s2 (c) 75 m/s2 (d) 50 m/s2

(v) The momentum of a body of mass 200g moving with a velocity of 15m/s is -
(a) 0.3 kg m/s (b) 30 kg m/s (c) 3 kg m /s (d) 4 kg m/s.
SECTION -B

9. Two particles are placed at some distance. If the mass of each of the two particles is doubled,
keeping the distance between them halved, and then what is the value of gravitational force
between them? [2]

10. The weight of any person on the moon is about 1 /6 times that on the earth. He can lift a mass
of 15 kg on the earth. What will be the maximum mass, which can be lifted by the same force
applied by the person on the moon? [2]
SECTION- C
11. Derive the following equation of motion by graphical method- [3]

(a) S = ut +1/2 at2 (b) v2 = u2 + 2as.

SECTION-D

12. (A) Give the statement of Newton’s second laws of motion.
Using second law of motion, derive the relation between force and acceleration

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(B) An object of mass 100kg is accelerated uniformly from a velocity of 1.5 m/s to 1.8 m/s in 6s
. Calculate the initial and final momentum of the object. Also, find the magnitude of the
force exerted on the object.. [3+2=5]

OR
(A) What is Law of conservation of linear momentum? Prove it by using Newton’s third laws
of motion.
(B) Two bodies A and B of mass m1 and m2 are moving with velocity ‫ݑ‬ଵ and ‫ݑ‬ଶ in same straight
line but in opposite directions, collide with each other. After collision they move together
as combined body. Find the common velocity of the combined body. Given m1 = 50 kg, m2
= 40 kg and ‫ݑ‬ଵ = 5 m/s and ‫ݑ‬ଶ = 3 m/s.

CHEMISTRY
SECTION -A
1. What do you understand by the term latent heat of fusion? [1]

2. Smoke and fog both are aerosols .In what way are they different? [1]

3. What is an ion? Give one example.
OR [1]

Define atomicity . Give one example .
4. In the question number 4 , a statement of assertion (A) is followed by a statement of reason (R).
Mark the correct choice as :

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of
assertion (A).

(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of
assertion (A).

(c) Assertion ( A) is true but reason ( R) is false.

(d) Assertion (A) is false but reason (R ) is true

Assertion: When a beam of light is passed through a colloidal solution placed in a dark place
the path of the beam becomes visible.

Reason: Light gets scattered by the colloidal particles.

5. Read the passage given below and answer any four questions.
Gases are highly compressible as compared to solids and liquids. The liquefied petroleum gas
(LPG)cylinder that we use in our home for cooking or the oxygen supplied to hospitals in
cylinders are compressed gas. Compressed natural gas (CNG) is used as fuels these days in
vehicles.The liquid takes the shape of the container in which they are kept. The aquatic animals
can breathe under water.The rate of diffusion of liquids is greater than solids.

1.Why compressed natural gas (CNG) is used as fuel these days in vehicles?

(a) Due to its high compressibility.
(b) Large volumes of gas can be compressed into a small cylinder.
(c) Transported easily
(d) All of these
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2. Liquids have no fixed ------ but have a fixed ---------.
(a) shape,volume
(b) volume, shape
(c) shape,size
(d) size,shape
3. The aquatic animals can breathe under water due to
(a) the presence of dissolved carbon dioxide in water
(b) the presence of dissolved oxygen in water
(c) the presence of dissolved nitrogen in water
(d) all of these
4. The rate of diffusion of liquids is greater than solids due to
(a) liquid particles move freely
(b) the interparticle space is greater in liquids
(c) both (a) and (b)
(d) none of these

5. The property of flow is unique to fluids.Which one of the following statements is correct?
(a) Only gases behave like fluids
(b) Gases and solids behave as fluids
(c) Gases and liquids behave like fluids
(d) Only liquids are fluids
SECTION-B

6. What would you observe when [2]

(a) a saturated solution of potassium chloride prepared at 600 C is allowed to cool to room
temperature.
(b) a mixture of iron filings and sulphur powder is heated strongly.
OR

Calculate the mass of sodium sulphate required to prepare its 20 % (mass percent) solution in
100g of water.

7. Why do we see water droplets on the surface of a glass containing ice cold water? [2]
SECTION –C

8. Give the differences between mixture and compound ( Write 3 points ) [3]

9. Give reasons: [3]

(a) A gas fills completely the vessel in which it is kept.
(b) A gas exerts pressure on the walls of the container.
(c) We can easily move our hand in air but to do the same through a solid block of wood we

need a karate expert.

10. Write three limitations of Dalton ,s atomic theory. [3]

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SECTION –D

11. (a) State the law of constant proportion. Illustrate with the help of an example.
(b) Write chemical formulae of the following compounds:
(i) Magnesium Chloride
(ii) Ammonium Carbonate
(c) What is the difference between molecules of elements and molecules of compounds?
[2+2+1]
OR
(a) What mass of silver nitrate will react with 5.85 g of sodium chloride to produce 14.35 g of
silver chloride and 8.5 g of sodium nitrate if the law of conservation of mass is true?
(b) Write chemical formule of the following compounds:
(i) Hydrogen sulphide
(ii) Aluminium oxide
(c) Calculate the formula unit mass of CaCl2[atomic masses: Ca-40u, Cl – 35.5u]
[2+2+1]

BIOLOGY

SECTION- A

1. Name the epithelial tissue that forms [1]
i. Lining of kidney tubules
ii. Skin
2. Why are organisms like bacteria and blue-green algae called prokaryotes? [1]
OR
State a reason for calling plasma membrane a selectively permeable membrane.
3. State the role of large air cavities present in the parenchyma of aquatic plants. [1]
OR
Which meristem is responsible for the transformation of the stem of a young plant into
trunk when it grows into a tree?
4. The epidermis of desert plants has a thick waxy coating of cutin on its outer surface. [1]
Mention why.
For questions number 5 and 6, two statements are given- one labeled Assertion (A)
and the other labeled Reason (R). Select the correct answer to these questions from
the codes (a), (b), (c) and (d) as given below: -
(a) Both A and R are true, and R is the correct explanation of the Assertion.
(b) Both A and R are true, but R is not the correct explanation of the Assertion.

(c) A is true, but R is false.
(d) A is false, but R is true.

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5. Assertion (A): Columnar epithelium occurs in the lining of the intestine. [1]
Reason (R): It is specialized to absorb nutrients.
OR
Assertion (A): Epithelium covers most organs and cavities within the animal body.
Reason (R):Epithelial cells have a lot of intercellular spaces between them.
6. Assertion (A): Cell wall is a non-living, outer rigid part of a plant cell. [1]
Reason (R): It offers protection, definite shape and support.

7. Read the following passage and answer any four questions from 7(i) to 7(v): [1x4]
Cell division is the process by which a parent cell divides into two or more
daughter cells. Cell division usually occurs as part of a larger cell cycle. In eukaryotes,
there are two distinct types of cell division; a vegetative division, whereby each
daughter cell is genetically identical to the parent cell (mitosis), and a reproductive
cell division, whereby the number of chromosomes in the daughter cells is reduced
by half to produce haploid cells (meiosis). In cell biology, mitosis is a part of the
cell cycle, in which, replicated chromosomes are separated into two new nuclei.
Cell division gives rise to genetically identical cells in which the total number
of chromosomes is maintained. Meiosis results in haploid daughter cells by
undergoing one round of DNA replication followed by two divisions.
i. Which of the following doesn't divide by mitosis?
a. Sperm cell
b. Root tip cells
c. Liver cells
d. Cells on shoot tip
ii. The meiotic division takes place in
a. Meristematic cells
b. Conductive cells
c. Reproductive cells
d. Vegetative cells
iii. Which statement does not enumerate the significance of mitosis?
a. Mitosis helps in the growth and repair of tissues in organisms.
b. Development of the zygote is maintained by the process of mitosis.
c. Mitosis assists in the formation of sex cells.
d. Asexual reproduction occurs with the help of mitosis.
iv. Choose the incorrect statement:
a. Chromosomes are made up of DNA and proteins.
b. At the time of cell division, chromatin material condenses into rod-like
structures called chromosomes.
c. Amitosis occurs in prokaryotes.

d. Mitosis is reductional division while meiosis is an equational division.
v. Meiosis is significant because
a. It produces identical cells.
b. It restores the original number of chromosomes (after fertilization).
c. It occurs in somatic cells of the body.
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d. It plays no role in genetic diversity.
SECTION- B
8. a. Differentiate between diffusion and osmosis. [1+1=2]
b. Mention any two examples where a living organism uses osmosis to absorb water.
OR
a. Grass looks green and papaya appears yellow. Name the cell organelle res
responsible
for this.
b. Comment on the internal organization of this organelle.
9. List two characteristics of cork cells that help them to function as protective tissue. [2]

SECTION- C
10. Raman carried out the following osmosis experiment. He took four peeled potato halves [3]
and scooped each one out to make potato cups. One of these potato cups (D) was made
from a boiled potato. He then put each potato in a trough containing water for two hours
as shown below.

Based on the above experimental setup, answer the following questions:
a. Explain why water gathers in the hollowed portions of (B) and (C).
b. Why is potato (A) necessary for this experiment?
c. Explain why water does not gather in the hollowed
hollowed-out portions of (D).
OR
Differentiate between the following
followin pairs:
a. Nuclear region of a bacterial cell and that of onion peel cell
b. Chromatin and chromosomes
c. Suberin and lignin
11. From the diagram given below, answer the following questions: [3]

a. Identify the plant tissue and label the part marked ‘A’.
b. Infer any two characteristic features of these cells.

c. Name any one part of the plant where these cells are present and specify the function
of the tissue.

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12. Give reasons why. [3]
a. Endocytosis occurs only in animal cells.
b. A person starts vomiting after he takes the concentrated solution of salt.
c. Only living cells and not the dead cells are able to absorb water by osmosis.
OR
Write the functions of
a. Inner membrane of mitochondria
b. Chromosomes in the nucleus of a cell
c. DNA and ribosomes in plastids

SECTION- D
13. a. Draw a neat diagram to show a section of phloem and label any three elements.
b. Mention one functional difference between xylem and phloem.
c. Name two elements of xylem that helps in actual transport of water and minerals
vertically in plants.
d. Why are xylem and phloem called complex permanent tissue? [2+1+1+1]

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