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i-Tutor Term Test-2A Science-CBSE (Class IX)

Regd. Office : Aakash Tower, 8, Pusa Road, New Delhi-110005

Ph.: 011-47623456

M.M. : 80 i-Tutor Term Test-2 Time : 3 Hrs.

Hybrid Classroom Course Science-CBSE (Class IX)

(i) The question paper comprises three sections A, B and C. You are to attempt all the sections.

(ii) All questions are compulsory.

(iii) Section A comprises of 20 questions (10 VSA, 8 MCQ and 2 AR Type) of 1 mark each. Section B comprises of 10 questions of 3 marks each. Section C comprises of 6 questions of 5 marks each.

(iv) There is no overall choice in the paper. However, internal choice is provided in 3 questions of 1 mark, 2 questions of 3 marks, 2 questions of 5 marks.

(v) Use of calculator is not permitted.

(vi) It is mandatory to use Blue/Black Ballpoint Pen to write the answer.

SECTION – A

Very Short Answer Type Questions : [10×1=10] 1. What is aerenchyma? [1] 2. State any two important characteristics of meristematic tissue. [1] 3. A stone moves in a circular path with a certain speed and changes direction at every point. The change in

direction involves change in velocity or acceleration. The force that causes this acceleration and keeps the body moving along the circular path is acting towards the centre. This force is called the centripetal force.

The motion of the moon around the earth is due to the centripetal force. The centripetal force is provided by the force of attraction of the earth.

(a) Write the name of force which is provided by earth to moon as centripetal force. [1] (b) Is velocity of particle remain same in uniform circular motion? [1] (c) Write direction of centripetal force. [1] (d) Write SI unit of gravitational constant. [1]

Topics Covered : Physics : Complete Syllabus of Module-1 (Excluding Floatation)

Chemistry : Is Matter Around Us Pure? (Complete Chapter)

Biology : Chapter-1 and 2 (Complete Chapter)

GENERAL INSTRUCTIONS :

Code A Date : 18-11-2020

Phase-II (HYBRID)

Science-CBSE (Class IX) i-Tutor Term Test-2A

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4. Answer question numbers 4(a) to (4d) on the basis of your understanding of following paragraph and the related studied concepts.

A colloid is a solution in which the size of solute particles is bigger than that of a true solution but smaller than that of a suspension. Thus, colloid appears to be homogeneous but actually they are heterogeneous.

(a) What is the size of colloidal particles? [1] (b) Give two examples of colloid. [1] (c) Write the dispersion medium and dispersed phase of gel. [1] (d) Comment on the stability of colloid. [1] Multiple Choice Type Questions : [8×1=8] 5. Identify the correct option. [1] (1) Friction is a non-contact force

(2) Limiting friction is greater than sliding friction

(3) Limiting friction is directly proportional to speed of the body

(4) Limiting friction depends on shape of the body

6. Velocity-time graph of an object is given below. The object has [1]

(1) Uniform velocity (2) Variable acceleration

(3) Uniform speed (4) Uniform retardation

7. 1 kgf = __________dyne [1] (1) 980 (2) 9800

(3) 98000 (4) 980000

OR The weight of a body is measured to be 240 N on the earth. What will be its weight at the centre of earth.

(1) 120 N (2) Zero

(3) 240 N (4) 80 N

8. Which of the following mixtures cannot be separated by sublimation? [1] (1) Anthracene + Common salt

(2) Camphor + Chalk

(3) Common salt + Camphor

(4) Anthracene + Camphor

9. The pair of elements which exist in liquid state at room temperature is [1] (1) Mercury and gallium

(2) Cesium and bromine

(3) Mercury and bromine

(4) Cesium and gallium

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i-Tutor Term Test-2A Science-CBSE (Class IX)

OR Sedimentation is generally followed by [1] (1) Sublimation (2) Centrifugation (3) Decantation (4) Distillation 10. Fat cells are also known as [1] (1) Adipocytes (2) Leucocytes (3) Osteocytes (4) Chondrocytes 11. Match the following. [1] Column-I Column-II a. Compound microscope (i) Knoll and Ruska b. Mitochondria (ii) E. Haeckel c. Electron microscope (iii) Christian de Duve d. Plastid (iv) Z. Janssen e. Lysosome (v) Kolliker (1) a(iv), b(i), c(v), d(ii), e(iii) (2) a(iv), b(v), c(ii), d(i), e(iii) (3) a(iv), b(v), c(i), d(ii), e(iii) (4) a(i), b(ii), c(iii), d(iv), e(v) 12. Tissues are made up of [1] (1) Cells with similar structure but no particular function (2) Cells with dissimilar structure but a particular function (3) Cells with common origin and performing a particular function (4) Cells with common origin and performing no particular function

OR Which of the following cells produces mucus? [1] (1) Goblet cell (2) Plasma cell (3) Germ cell (4) Mast cell Assertion & Reason Type Questions : [2×1=2] In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). (1) Both (A) and (R) are true and (R) is the correct explanation of (A)

(2) Both (A) and (R) are true but (R) is not the correct explanation of (A)

(3) (A) is true but (R) is false

(4) (A) is false but (R) is true

13. A : Mud is a colloid. [1] R : Mist does not show Tyndall effect.

14. A : Every multi-cellular organism has come from a single cell. [1] R : Some organisms can also have cells of different kind.

Science-CBSE (Class IX) i-Tutor Term Test-2A

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SECTION – B

Short Answer Type Questions : [10×3=30] 15. A body initially moving with velocity u undergoes uniform acceleration to attain velocity v after time t. Draw its

corresponding displacement-time, velocity-time and acceleration-time graphs. [3]

16. State Kepler’s laws of planetary motion. [3]

17. State Newton’s second law of motion.

Prove that 2 1–p pF

t

=

using this law, where p2 and p1 are the final and initial momentum of a body and

F is the external unbalanced force acting on it. [3]

OR

See the given figure carefully.

A block of mass 2 kg, initially moving with velocity of 8 m/s on frictionless surface, collides with another block of mass 2 kg resting on the edge of the surface having value of kinetic friction as 4 N. After collision the two blocks stick and move together. Find the distance travelled by both the blocks before they come to rest. [3]

18. Illustrate with an example that “rest and motion are relative”. [3]

19. Define alloys. Write the name of metals present in [3]

(i) Brass

(ii) Bronze

20. How much sugar should be added to 250 g of 20% (w/w) sugar solution to make its concentration 25% (w/w)? [3]

21. Write the differences between compounds and mixture. [Any three] [3 × 1]

22. State any three functions of nucleus. [3]

23. Draw a section of phloem and label the following parts: [3]

(a) Phloem parenchyma

(b) Sieve plate

(c) Companion cell

(d) Sieve tube

24. (i) What is xylem? [1]

(ii) Name the different elements of xylem. [1]

(iii) Mention any two functions of xylem. [1]

OR Explain the process of plasmolysis in plants with the help of a diagram. [3]

2 kg 2 kg

8 m/s

Frictionlesssurface

Surface having friction

i-Tutor Term Test-2A Science-CBSE (Class IX)

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SECTION – C

Long Answer Type Questions : [6×5=30] 25. (i) State the universal law of gravitation. [1] (ii) Write any four properties of gravitational force. [4] 26. (i) Two objects of mass M and 4M are placed at a distance 10 m apart. At what distance from mass M will

the net gravitational force on any object be zero? [3] (ii) A ball is thrown vertically upwards with velocity v to attain maximum height s. If it is thrown upwards with

velocity nv, then find the maximum height attained by the stone. [2] OR

(i) Explain, why while driving car, the drivers and passengers are advised to wear seat belts. [2] (ii) What do you mean by balanced and unbalanced force? [2] (iii) A constant force of 5 N acts on a body of mass 10 kg. Find the acceleration produced in it. [1] 27. (i) Give the name of the technique used to separate. [3] (a) Butter from cream

(b) Pigment from natural colour

(c) Dye from blue / black ink

(d) Kerosene oil from water

(e) Acetone from its mixture with water

(f) Pure common salt from sea water

(ii) Write the names of dispersed phase and dispersion medium of [2] (a) Smoke

(b) Jelly 28. (i) Differentiate between true solution and suspension on the basis of [3] (a) Particle size

(b) Stability

(c) Filterability

(ii) Define [2] (a) Tyndall effect

(b) Brownian motion 29. (i) Give a brief account on three different types of cartilage. [3] (ii) Define serum. [1] (iii) Why is cork used for making cricket balls and shuttle cocks? [1] 30. (i) Give a comparative account of smooth muscle, skeletal muscle and cardiac muscle. (Any 5 points) [2½] (ii) Draw a neat labelled structure of meristematic tissue. [2½]

OR

(i) Differentiate a prokaryotic cell from a eukaryotic cell. (Any 4 points) [2] (ii) (a) What is osmosis? Explain. [1½] (b) What will happen if we place an animal cell in a hypotonic solution? [1½]

Edition: 2020-21