Class IX
Class IX (Summative Assessment I) SCIENCE Science SUMMATIVE ASSESSMENT (SA I)
MODEL PRACTICE PAPER NO. 01
Key features of Model Practice Papers:
 Model Practice Papers are based on the entire syllabus of the
subjects covered under CBSE Board Examinations.
 They are prepared exactly as per the papers set in the CBSE Board
Examinations.
 The questions are picked/ set in such a way that students get
acquainted with each and every concept of the syllabus.
 All the questions provided in the practice papers have detailed and
authentic solutions.
 Practice Papers will provide sufficient practice before the actual
examination for obtaining high scores.
 It enables the student to use an effective study method and “have a
go” before the final examination.
1 Class IX (Summative Assessment I) Time allowed: 3 hours
Science Maximum Marks: 90
General Instructions:
(i)
The question paper comprises of two sections, A and B. You are to attempt both
the sections.
(ii)
All questions are compulsory.
(iii)
All questions of section A and all questions of section B are to be attempted
separately.
(iv)
Question numbers 1 to 3 in section A are one mark questions. They are to be
answered in one word or in one sentence.
(v)
Question numbers 4 to 6 in section A are two mark questions. These are to be
answered in about 30 words each.
(vi)
Question numbers 7 to 18 in section A are three mark questions. These are to
be answered in about 50 words each.
(vii)
Question numbers 19 to 24 in section A are five mark questions. These are to be
answered in about 70 words each.
(viii) Question numbers 25 to 33 in section B are multiple choice questions based on
practical skills. Each question is a one mark question. You are to select one
most appropriate response out of the four provided to you.
(ix)
Question numbers 34 to 36 in section B are questions based on practical skills
are two marks questions.
2 Class IX (Summative Assessment I) Science SECTION – A
Q1.
Bromine particles are almost twice as heavy as chlorine particles. Which gas will
diffuse faster; bromine or chlorine?
Q2.
Name the plastid involved in conversion of light into energy.
Q3.
Can the speed of a body be negative?
Q4.
(a) What are the two methods of improving crop varieties?
(b) Why is nitrogen referred to as a macronutrient?
Q5.
Explain:
(a) We can get the smell of perfume several metres away.
(b) Steam produces severe burns.
Q6.
When the striker hits at the bottom of the pile of the coins placed at the centre of
the carom board only the lowest coin is removed. Why?
Q7.
After the winters, Ankita;s mother keep winter clothes in almirah but after a few
days the clothes get attacked by insects. Her mother kept the clothes in sunlight
and again kept in almirah. But again the clothes were attacked by insects. She
discussed this problem with Ankita. Ankita suggested her mother to keep
naphthalene balls in the woolen clothes while storing. After some days her
mother checked the clothes, the clothes were safe but the naphthalene balls
disappeared.
(a) What is the reason behind Ankita’s suggestion?
(b) Why naphthalene balls disappeared?
(c) What values are associated with this?
Q8.
(a) What are dispersed phase and dispersion medium in colloids?
(b) Why Tyndall effect is not seen in true solution?
(c) Calculate the amount of glucose required to prepare 250 g of 5% of solution
of glucose.
3 Class IX (Summative Assessment I) Q9.
Science Which process of separation is used to separate drugs from blood? Explain.
Q10. Explain the following:
(a) Vermicompost
(b) Biofertilizers
(c) Biological pest control
Q11. (a) Name one abiotic and one biotic factor which bring about loss of food grains
during storage?
(b) State any two control measures to be taken before grains are stored.
Q12. Which cell organelle is called “suicidal bag”, explain why is it called so?
Q13. Explain that livestock production needs to be improved. Why there is necessity of
animal husbandry?
Q14. Explain by giving examples, how a force may change the size or shape of an
object.
Q15. Distinguish between distance and displacement.
Q16. Draw distance–time graphs for (a) uniform motion (b) non- uniform motion.
Q17. State any two differences between mass and weight. Mass of an object is 5 kg.
What is its weight on earth?
Q18. Obtain a relation between
and G.
Q19. When a beam of light enters a room through a window, we can see tiny particles
X suspended in a gas (or rather a mixture of gases) Y which are moving rapidly
in a very haphazard manner.
(a) What could particles X be?
(b) Name the gas Y.
(c) What is the phenomenon exhibited by particles X known as?
(d) What is causing the movement of particles X?
(e) What conclusion does the existence of this phenomenon give about the
nature of matter?
4 Class IX (Summative Assessment I) Science Q20. (a) Identify physical and chemical change with explanation
(i) Freezing of water (ii) Rusting of iron
(b) Why cooking utensils are made of copper or aluminium?
(c) Draw a labeled diagram to show the process of sublimation.
Q21. What are plastids, mention its type? Write function of each plastid.
Q22. The figure shows two crop fields (plots A and B) have been treated by manures
and chemical fertilizers, respectively, keeping other environmental factors same.
Observe the graph and answer the following questions: (i) Why does plot B shows sudden increase and then gradual decrease in yield?
(ii) Why is the highest peak in plot A graph slightly delayed?
(iii) What is the reason for the different pattern of the two graphs? Q23. Answer the following:
(a) Name the property of bodies to resist change in their velocity.
(b) What is relationship between force and acceleration?
(c) What name is given to the product of mass and velocity?
(d) Which physical quantity corresponds to the rate of change of momentum?
(e) What is SI unit of force?
5 Class IX (Summative Assessment I) Science Q24. Answer the following:
(a) What is slope of the displacement-time graph when the body has uniform
motion?
(b) Why is the motion of an athlete moving along the circular path an
accelerated motion?
(c) Can body have constant speed and still be accelerating?
(d) Under what conditions of motion, the distance covered by a body is equal to
the magnitude of its displacement?
(e) What is the average velocity of a particle when it returns to its starting point?
Can its average speed be zero?
6 Class IX (Summative Assessment I) Science SECTION – B
Q25. The appearance of magenta colour, on adding conc. HCl to a given sample of
solution of dal confirms the presence of:
(a) Argemone oil
(b) Potassium dichromate
(c) Saw dust
(d) Metanil yellow
Q26. The steps for conducting the starch test on the given sample of rice grains are
given below. Select the correct sequence of the steps:
(i) Crush the rice grains
(ii) Add water to the test tube
(iii) Add few drops of iodine
(iv) Boil the contents and filter
(a) ii, iii, i, iv
(b) ii, i, iii, iv
(c) iii, iv, i, ii
(d) i, ii, iv, iii
Q27. When light is passed through samples A and B placed in a line, the effects as
shown in the figure below are observed:
Which of the following pairs is the correct description of both the samples?
(a) A = Solution B = Solution
(b) A = Sol and B = Sol
(c) A = Sol and B = Suspension
(d) A = Sol and B = Solution
7 Class IX (Summative Assessment I) Science Q28. Which one is correct statement about the reaction?
Fe (s) + CuSO4 (aq) → FeSO4 (aq) + Cu (s)
(a) Iron is more reactive than copper
(b) Iron is less reactive than copper
(c) In this reaction Cu2+ is oxidized and Fe is reduced
(d) Copper is more reactive than iron
Q29. In which of the following experimental setups the thermometer will record the
lowest temperature?
(a) I
(b) II
(c) III
(d) IV
Q30. Which of the observations noted by Arun about the parenchyma tissue is not
correct?
(a) The cells are thin walled.
(b) Large cells placed together with intercellular spaces
(c) The cells are loosely packed
(d) The cells are thick walled
8 Class IX (Summative Assessment I) Science Q31. During experiment we put cover slip very carefully on a material to avoid
(a) Drying of the material.
(b) Folding of the material.
(c) Air bubbles.
(d) All of the above
Q32. For pulling a wooden block placed over a table with the help of a spring balance,
which of these not correct?
(a) Block should be rough.
(b) Block should be smooth.
(c) Table should be smooth.
(d) Black and table both should be smooth.
Q33. In an experiment to establish relationship between weight of a rectangular block
lying on a horizontal table and the minimum force required to just move it using a
spring balance, which type of string should be used?
(a) Very high elasticity
(b) Less elasticity
(c) Moderate elasticity
(d) Any can be used
Q34. In the experiment of chemical reaction between iron nail and copper sulphate;
(i) Why the final solution turns green?
(ii) Which type of reaction takes place between the two?
Q35. In the experiment for sublimation of ammonium chloride, explain the reason for
following precautions.
(i) Vapours of ammonium chloride should not be inhaled.
(ii) Glass apparatus should be handled with care.
Q36. Why reagent Methylene blue is to be handle carefully while staining animal cell?
9 Class IX (Summative Assessment I) Science SOLUTION OF MODEL PRACTICE PAPER NO. 01
SECTION – A
A1.
Chlorine will diffuse faster than bromine vapour because light particles diffuse
faster than heavier particles.
A2.
Chloroplast.
A3.
No, because the speed of the body is ratio of distance and time. Speed cannot
be negative because time and distance travelled is never negative.
A4.
(a) Hybridisation and genetic manipulation are the two methods of improving
crop varieties.
(b) Nitrogen is needed in large quantities by the plant among the nutrients
provided by soil.
A5.
(a) Due to diffusion of perfume vapours into air. When perfume bottle is opened,
then the liquid perfume quickly changes into vapour. These vapours move
rapidly in all directions in air and mix with air particles and hence spread with
air.
(b) Steam has more heat than boiling water by an amount equal to latent heat of
vapourisation. Therefore, steam produces severe burns.
A6.
The bottom coin moves due to force applied by the striker to the coin during its
collision. Once the lowest coin is removed, the inertia of other coins makes them
fall vertically on the board.
A7.
(a) Naphthalene balls are good insecticides. Thus it kills the insects. Therefore,
Ankita suggested to keep napthalene balls in woolen clothes.
(b) Naphthalene balls disappeared with time because naphthalene undergoes
sublimation. The naphthalene balls keep on forming naphthalene vapours
slowly which disappears into the air.
(c) Values associated with this are:
10 Class IX (Summative Assessment I) A8.
Science 
Knowledge of chemistry put to use in daily life.

Helping and caring attitude.
(a) Solute particles in colloids are known as dispersed particles and solvents are
known as dispersion medium.
(b) Tyndall effect is not seen in true solution because of small size of particles of
true solution.
(c) This can be calculated as:
Concentration of solution = 5
250 100 100 250 5
100 M M = 12.5 g
A9.
The process used for separation of drugs from blood is chromatography.
Chromatography is a technique used for separation of those solutes that dissolve
in the same solvent. In this technique, a drop of mixture is put on a filter paper.
And then the filter paper is allowed to dip in a suitable solvent. The solvent
gradually rises up the filter paper strip. The filter paper strip is then dried.
Different coloured spots are seen on the filter paper.
11 Class IX (Summative Assessment I) Science A10. (a) Vermicomposting is the process of using earthworms and micro-organisms
to turn organic wastes into very high quality compost.
(b) Biofertilizers are the living organisms like nitrogen fixing bacteria, blue green
algae and minerals solubilising bacteria are called bio fertilizers.
(c) Biological pest control is a method in which some birds, insects are
deliberately put in the pest affected field. They destroy by picking the pests in
the field.
A11. (a) One abiotic factor is moisture content in the grains.
One biotic factor is the insects.
(b) Two control measures to be taken before grains are stored:

Complete cleaning of grains and removal of mud particles from them.

Proper sun drying to make grains free from extra moisture before
storage.
A12. Lysosomes are called suicidal bag as they contain hydrolytic enzymes. They are
capable of breaking down all organic material and keep the cell clear by digesting
worn out cell organelles. They are membrane bound sacs filled with powerful
digestive enzymes. When the cell is worn out and needs to be destroyed, the
lysosomes burst and enzymes digest the cell.
A13. The growing awareness of the need for human treatment of livestock has brought
in new limitations in livestock farming. Thus livestock production needs to be
improved. Animal husbandry is the scientific management of animal livestock. It
includes various aspects such as feeding, breeding and disease control. Animalfarming includes cattle, goat, sheep, poultry and fish farming. As the population
increases and as living standards increases, the demand for milk, eggs and meat
are also growing up.
A14. A force can change the size and shape of a body.
For example: Take a helical spring. Try to stretch it by applying forces at its ends
outwards. It is found that the length of the spring increases. However if forces are
12 Class IX (Summative Assessment I) Science applied inwards then the spring is compressed and the length of the spring
decreases.
Take a balloon and apply force on both sides by pressing with your hands. The
shape of the balloon will change. A15.
Displacement
Distance
It is the shortest path length along a
straight line drawn from initial position to
final position.
It is total path length covered by the
particle in motion in given time interval.
Displacement has both magnitude and
direction i.e., it is a vector.
Distance covered has only magnitude i.e.,
it is scalar.
Displacement of a particle in motion may
be positive, negative or even zero.
Distance covered is always positive.
Displacement of a particle in a given time
can be either equal to or less than the
distance covered.
Distance covered is equal to or more than
the displacement of a moving particle in a
given time.
13 Class IX (Summative Assessment I) Science A16. (a) The distance-time graph for uniform motion (i.e., for an object moving with
uniform speed) has been shown. The graph is straight line inclined to the
axes.
(b) The distance-time graph for non-uniform motion (i.e., speed is changing with
time). Here the graph is non-linear one.
A17.
Mass
Weight
It is the amount of matter
contained in a body.
It is a force equal to the
gravitational pull exerted by the
planet.
It is constant quantity and does
not change with respect to the
position or place.
It is variable quantity and
changes with change in
acceleration due to gravity at a
given place.
14 Class IX (Summative Assessment I) Mass of given object,
Science = 5 kg
 = 5 kg  9.8 m/s2 = 49 N
A18. Suppose a body of mass
of mass
is dropped from a distance
from centre of the earth
.Let the acceleration due to gravity is .
Therefore, according to Newton’s Second Law of Motion which states that Force
is the product of mass and acceleration,
 …… (i)
Now, according to Universal Law of gravitation,
.
.
…… (ii)
Thus, from above two expressions, we get
2
Where, is acceleration due to gravity.
G is the Universal Gravitational Constant.
is the mass of earth.
And
is the distance between object and centre of earth.
When a body is near the surface of earth, the distance between body and centre
of the earth will be equal to the radius of earth because the distance of body is
negligible in comparison of the radius of earth.
Let the radius of earth is equal to .Therefore, after substituting ‘ ’ at the place of
‘ ’ we get,
…. (iv)
2
A19. (a) Particle X could be dust particles.
(b) Y is air.
(c) The phenomenon is known as Brownian motion.
(d) The fast moving air molecules are constantly hitting the tiny dust particles
causing them to move rapidly in a very haphazard manner.
15 Class IX (Summative Assessment I) Science (e) The gaseous matter sir is made up of very tiny particles which are constantly
moving.
A20. (a) (i) Physical change: When water is cooled, it solidifies to form ice. During
the change there is no change in chemical composition of water. Thus it
is a physical change.
(ii) Chemical change: Rusting of iron is a chemical change. In this process,
iron reacts with oxygen or moisture to form a coating of iron oxide. Thus
a new substance is formed.
(b) Copper is a good conductor of heat. Therefore, cooking utensils and boilers
are usually made of copper.
(c) The process of sublimation is represented as: A21. Plastids are the cell organelles are found only in plant cells. Plastids are of three
types:
1.
Chloroplasts: They are green colour plastids and found in leaves. The green
colour is due to the presence of chlorophyll.
2.
Chromoplasts: They are yellow, orange and red colour plastids and found in
flowers and fruits.
16 Class IX (Summative Assessment I) 3.
Science Leucoplasts: They are colourless plastids which found in roots, seeds and
underground stems.
The function of the different plastids is given below:
I.
Chloroplast is to trap solar energy for photosynthesis.
II.
Chromoplast gives colour to flowers to attract insects for pollination.
III. Leucoplasts store food in the form of carbohydrates, fats and proteins.
A22. (i) Sudden increase due to supply of the minerals immediately in good quantity
from chemical fertilizer.
Gradual decrease due to depletion of nutrients caused by absorption by
plants, leaching to lower layer of the soil and killing of decomposer
microorganisms.
(ii) Manures decompose slowly so that release of minerals is also delayed.
Manures take time to mix up with the soil and form crumbs that increase
water holding and aeration of the soil.
(iii) The difference in the two graphs indicates that manuring the soil of crop
fields in more beneficial than, the use of chemical fertilizers. Rather, use of
chemical fertilizers is harmful in the longer run. A23. (a) Inertia
(b)
(c) Momentum
(d) Force
(e) newton A24. (a) The slope of displacement-time graph gives the value of uniform velocity.
(b) It is because the direction of speed changes continuously.
(c) Yes, when the body moves along a circular path with uniform speed it
possesses centripetal acceleration.
17 Class IX (Summative Assessment I) Science (d) This happens when a body moves along a straight line without reversing its
direction.
(e) When a body return to its starting point, its average velocity is zero. But its
average speed cannot be zero.
18 Class IX (Summative Assessment I) Science SECTION – B
A25. Correct option: d
Metanil yellow is an adulterant which is added to improve colour and appearance
of dal.
A26. Correct option: d
Iodine gives blue black colour in presence of starch.
A27. Correct option: d
Path of light is visible in B only. Hence A is colloid (Sol) and B is solution.
A28. Correct option: a
Iron replaces copper and forms ferrous sulphate. Therefore, iron is more reactive
than copper.
A29. Correct option: d
A30. Correct option: d
The cells of parenchyma are living, thin walled and with intercellular spaces.
A31. Correct option: d
Cover slip prevents drying of the material and keeps the material intact at its
place.
A32. Correct option: a
A33. Correct option: d
Explanation: In the given experiment, the purpose of the string is to simply tie the
block to the spring balance hence we can use any string.
A34. (i) Because ferrous ions have gone into the solutions.
(ii) It is a type of displacement reaction. Fe + CuSO4 → FeSO4 + Cu
A35. (i) Vapours of ammonium chloride contain ammonia gas and hydrochloric gas
which are harmful. Thus they are not to be inhaled.
19 Class IX (Summative Assessment I) Science (ii) Glass apparatus should be handled with care because they are fragile.
A36. Methylene blue stains negatively charged molecules in the cell, including DNA
and RNA. This dye is toxic when ingested and it causes irritation when in contact
with the skin and eyes.
20