Subject: Science
Class IX – Mid Term Practice Paper
Time Allowed: 3 hours
Max. Marks: 80
General Instructions:
(i) The question paper comprises four sections A, B, C and D. There are 36 questions in the question paper. All questions are compulsory.
(ii) Section–A – question no. 1 to 20 – all questions and parts thereof are of one mark each. These questions contain multiple choice questions (MCQs), very short answer questions and assertion – reason type questions. Answers to these should be given in one word or one sentence.
(iii) Section–B – question no. 21 to 26 are short answer type questions, carrying 2 marks each. Answers to these questions should in the range of 30 to 50 words.
(iv) Section–C – question no. 27 to 33 are short answer type questions, carrying 3 marks each. Answers to these questions should in the range of 50 to 80 words.
(v) Section–D – question no. – 34 to 36 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.
SECTION – A
1. Convert the following temperatures to the Celsius scale. (a) 793 K (b) 870 K
OR
A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?
2. Arrange the following substances in increasing order of forces of attraction between the particles— (a) water, (b) sugar, (c) oxygen
3. What are alloys? Give one example.
4. What is concentration of a solution?
5. Name the two organelles we have studied that contain their own genetic material.
6. Why are lysosomes known as suicide bags?
OR
Where do the lipids and proteins constituting the cell membrane get synthesised?
7. What are the functions of the stomata?
8. What is the specific function of the cardiac muscle?
9. How will you differentiate between speed and velocity?
OR
What is the difference between distance and displacement?
10. Which of the following is true for displacement?
(a) It cannot be zero.
(b) Its magnitude is greater than the distance travelled by the object.
11. Explain law of inertia.
OR
If action is always equal to the reaction, explain how a horse can pull a cart.
12. What do you understand by momentum of an object? What is its SI unit?
OR
In an isolated system (where there is no external force), what happens to the total momentum?
13. What do you understand by organic farming?
For question numbers 14, 15 and 16, 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 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.
14. A: -Poultry farming is done to raise domestic fowls.
R: -Poultry production includes egg production and broiler production for poultry meat.
15. A: -The states of matter are inter-convertible.
R: -The state of matter can be changed by changing temperature or pressure.
16. A: -Matter is made up of small particles.
R: -The matter around us exists in three states— solid, liquid and gas.
Q. No 17 – 20 contain five sub-parts each. You are expected to answer any four subparts in these questions.
In India there has been a four times increase in the production of food grains from 1952 to 2010 with only 25% increase in the cultivable land area. This increase in production been achieved through the practices involved in farming, we can divide it into three stages. The first is the choice of seeds for planting. The second is the nurturing of the crop plants. The third is the protection of the growing and harvested crops from loss. Thus, the major groups of activities for improving crop yields can be classified as:
• Crop variety improvement
• Crop production improvement
• Crop protection management.
(i) What is kharif season period?
(a) June to July
(b) June to October
(c) June to November
(d) June to December
(ii) What is Rabi season period?
(a) November to April
(b) November to March
(c) November to February
(d) November to January
(iii) Plants manufacture their food in sunlight by the process called __________
(a) Photosynthesis
(b) Photoperiod
(c) Photolysis
(d) None of the above
(iv) Which of the following is not a Kharif crops?
(a) linseed
(b) Paddy
(c) pigeon pea
(d) maize
(v) Which of the following is not a Rabi crops?
(a)Wheat
(b) Soyabean
(c) Peas
(d) Mustard.
18. The concentration of a solution is the amount of solute present per unit volume or per unit mass of the solution. Solubility of a solution increases with the increase in the Temperature. During an experiment a student dissolve 50g of sugar in 350g of water at normal temperature. Concentration of a solution can be expressed by mass percentage as (mass of solute/mass of solution)/100.
(i) Which is a not a component of solution:
(a) Solute
(b) Solvent
(c) dispersed phase
(d) None of the above.
(ii)Sugar solution is a:
(a) Solution of solid and liquid.
(b) Solution of liquid and liquid
(c) Heterogeneous solution
(d) Solution of gas and liquid
(iii) Which statement is true about the concentration of a solution:
(a) Amount of solute present per unit volume.
(b) Amount of solvent present per unit volume.
(c) Never change with temperature.
(d) None of the above
(iv) What is the concentration of the solution prepared by the student during the above experiment?
(a) 0.125%
(b) 125%
(c) 12.5%
(d) 0.14%
(v) The bigger component of a solution is:
(a) Solute
(b) Solvent
(c) dispersed phase
(d) None of the above.
19. The sum of momentum of the two objects before collision is equal to the sum of momentum after the collision provided there is no external unbalanced force acting on them. This is known as the law of conservation of momentum. This statement can alternatively be given as the total momentum of the two objects is unchanged or conserved by the collision. Law of conservation of momentum is applicable to system of particle. Answer the following questions.
(i) Law of conservation of momentum is applicable to
(a) A system of particles
(b) Only for 2 particles
(c) Only for 1 particle
(d) None of the above
(ii) Law of conservation of momentum holds good provided that
(a) There should be external unbalanced force acting on particles
(b) There should not be any external unbalanced force acting on particles
(c) No internal forces acting on particles
(d) None of the above
(iii) The total momentum of the two objects when collision occurs is
(a) Changed
(b) Remains conserved
(c) Become zero
(d) None of the above
(iv) The SI unit of momentum is
(a) kgm/s
(b) Kg/ms
(c) Kgms
(d) Kg/s.
(v) The momentum is the product of mass and velocity which is the measure of the
(a) kinetic energy of the object
(b) Potential energy of the object
(c) Mechanical energy of the object
(d) Gravitational energy of the object
20. Blood is a connective tissue which has a fluid (liquid) matrix called plasma in which RBCs, WBCs and platelets are suspended. The plasma contains proteins, salts and hormones. Blood flows and transports gases, nutrients, hormones and waste materials to different parts of the body.
(i) Which cell provides us immunity?
(a) RBCs
(b) WBCs
(c) platelets
(d) plasma
(ii) Platelets helps in:
(a) blood coagulation.
(b) transportation of carbon dioxide.
(c) transportation of oxygen.
(d) transportation of hormone.
(iii) Carbon dioxide that produces in our body is transported by which cell of the blood:
(a) RBCs
(b)WBCs
(c) platelets
(d) plasma
(iv) Every connective tissue have:
(a) matrix
(b) cells are loosely spaced
(c) transport substance in the body
(d) both A and B
(v) Haemoglobin is present in which component of the blood:
(a) RBCs
(b) WBCs
(c) platelets
(d) plasma
SECTION-B
21. Why do we see water droplets on the outer surface of a glass containing ice cold water?
OR
Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why?
23. How would you confirm that a colourless liquid given to you is pure water?
OR
List the points of differences between homogeneous and heterogeneous mixtures.
24. An automobile vehicle has a mass of 1500 kg. What must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 ms-2?
25. An object travels 16 m in 4 s and then another 16 m in 2 s. What is the average speed of the object?
26. What would happen to the life of a cell if there was no Golgi apparatus?
SECTION-C
27. Write the steps you would use for making tea. Use the words solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.
OR
A solution contains 40 g of common salt in 320 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.
28. How does an Amoeba obtain its food? Explain with suitable diagram.
29. Name the following.
(a) Tissue that forms the inner lining of our mouth.
(b) Tissue that connects muscle to bone in humans.
(c) Tissue that transports food in plants.
(d) Tissue that stores fat in our body.
(e) Connective tissue with a fluid matrix.
(f) Tissue present in the brain.
30. Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and site/location in the body.
31. Starting from a stationary position, Rahul paddles his bicycle to attain a velocity of 6 m s–1 in 30 s. Then he applies brakes such that the velocity of the bicycle comes down to 4 m s-1 in the next 5 s. Calculate the acceleration of the bicycle in both the cases.
OR
State which of the following situations are possible and give an example for each of these:
(a) an object with a constant acceleration but with zero velocity
(b) an object moving with an acceleration but with uniform speed.
(c) an object moving in a certain direction with an acceleration in the perpendicular direction.
32. Describe in brief the Newton’s laws of motion with suitable examples for each.
33. How do you differentiate between capture fishing, mariculture and aquaculture?
SECTION – D
34. Answer the following questions:-
(a)What are the differences between prokaryotic and eukaryotic cell
(b) How will you differentiate a plant cell from an animal cell.?
OR
Answer the following questions:
(a) Describe Cell theory presented by Schleiden and Schwann and further explained by Virchow.
(b) Differentiate between isotonic, hypotonic and hypertonic solution.
35. Answer the following questions:
1. Why does a desert cooler cool better on a hot dry day?
2. How does the water kept in an earthen pot (matka) become cool during summer?
3. Why does our palm feel cold when we put some acetone or petrol or perfume on it?
4. Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
5. What type of clothes should we wear in summer?
36. Following figure shows the distance-time graph of three objects A, B and C. Study the graph and answer the following questions:
(a) Which of the three is travelling the fastest?
(b) Are all three ever at the same point on the road?
(c) How far has C travelled when B passes A?
(d) How far has B travelled by the time it passes C?