BREATHING AND RESPIRATION

1. Respiration-types, function and reaction

2. What do you mean by ventilation? Explain breathing mechanism (inhalation and exhalation)

3. Draw and label respiratory system and write their function.

4. Draw an alveoli and label its different parts with breathing mechanism.

5. Write the short note of the following

i) bronchitis, ii) Emphysema, iii) Carcinogen

6) Write the effect of smoking.

Book exercise-3, 4, 5, 6, 7, 8, 9, and 10

BLOOD AND CIRCULATION

1. What do you mean by single and double circulation?

2. Draw a human heart and label its different parts

3. Explain briefly artery, vein and capillary with function.

4. Draw an alveoli and label its different parts with mechanism.

5. Write down the effect of smoking (bronchitis, emphysema and carcinogen)

Book exercise: 3 to 10

COORDINATON

1. Draw an eye and label its different parts with function.

2. How many eye defects are found in human eye? Explain each of them.

3. What do you mean by pupil reflex? Explain briefly in bright and dim light.

4. What do you mean by synapse? Explain it mechanism.

Book exercise: 5 to 9.

CHEMICAL COORDINATION:

1. What do you mean by glands? Explain their type with example

2. Write down the different glands name and their secretory hormones with function.

3. How do you maintain our blood sugar level in our blood? Explain with flow chart.

4. What do you mean by diabetes? Explain its types with fig.

Book exercise: 1 to 5.

HOMEOSTASIS AND EXCRETION

1. What is homeostasis? Explain briefly with example

2. Why does homeostasis necessary to our body function?

3. How do we maintain our body temperature, blood sugar and water potential? Explain each of them.

4. Draw the urinary system and label its different parts with function.

5. Draw a kidney and label its different parts with function

6. What is nephron? Explain its filtering mechanism.

7. Draw skin and label its different parts.

8. What do you mean by vasodilation and vasoconstriction? Explain its mechanism.

Book exercise: 5, 6, 7, 8 and 9

REPRODUCTION IN ANIMALS

1. Write the difference between asexual and sexual reproduction.

2. Write the difference between mitosis and meiosis. Why does meiosis cell division needed in sexual reproduction?

3. Draw and label male and female reproductive system with different parts function.

4. Write the mechanism of menstrual cycle with explanation.

Book exercise question-5 to 10

Unit question- 1 to 7 (page -130)

REPRODUCTION IN PLANTS

1. What do you mean by bisexual and unisexual flower? Draw a bisexual flower and label its different parts

with function.

2. What is pollination? Explain insect and wind pollinated flowers with their characteristics.

3. How does a plant reproduce asexually? Explain one of the asexual reproductions in plant.

4. What do you mean by germination? Explain its factors these are effect in pollination.

Experiment –page 170

Book exercise-5 to 9

Unit questions-5, 6 (Page-185).

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Holiday Homework Class: IX (Int’l), Subject: Chemistry

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Holiday HomeworkClass: Std. IX (Intl) , Subject: H. Biology

Holiday HomeworkClass: Std. IX (Intl), Subject: H. Biology

BANGLADESH INTERNATIONAL SCHOOL & COLLEGE DOHS, Mohakhali, Dhaka Cantonment

Physics for Std IX (International)

Chapter 1: Movement and Position 1. Define with unit: distance, displacement, Speed, velocity, acceleration, and deceleration. What type of

quantities are these? 2. Graph: distance-time and velocity-time 3. Experiment: measuring acceleration by Galileo’s experiment, modern version of Galileo’s experiment. 4. Speed investigation using ticker tape 5. Mathematical problems with ticker – tape timer. 6. In which case ticker tape timer is not applicable? 7. Mathematical problems by equation v=u + at 8. Exercise Questions: 6, 7, 8, 11, 15, 16

Chapter 2: Forces and Shapes 9. Describe different types of forces – gravitational force or weight, normal reaction, up thrust, magnetic,

electrostatic, nuclear, balanced, unbalanced, friction, tension, 10. Write down the merits and demerits of friction. 11. What are brittle, resilient or elastic and plastic body? 12. State Hooke’s law. 13. Set an experiment to illustrate Hooke’s law. 14. What is elastic limit? 15. Which one is more elastic limit? Show with the graph. 16. Compare load – extension graph for steel and rubber band. 17. Exercise Questions: 1, 4, 5, 6, 9

Chapter 3: Forces and Movement 18. What is resultant force? 19. Set an experiment to show the relation between acceleration – force and acceleration – mass. 20. How friction and braking of a car related? 21. Define – stopping, thinking and braking distance. 22. Mathematical problems with stopping, thinking and braking distance. 23. What factors affect the braking distance? 24. What is weight? 25. What is terminal velocity? For a parachutists show terminal velocity in a velocity – time graph. 26. Exercise questions: 2, 3, 4, 7, 8, 9, 10

Chapter 4: Momentum 27. What is momentum? What type of quantity is it? Write down its unit. 28. Write down Newton’s laws of motion. 29. State second law of Newton and show that F = ma 30. Write down the conservation law of momentum? 31. What do you mean by elastic and inelastic collision? State with example. 32. Show conservation law of momentum for the following cases:

a) When both objects are moving to the same direction b) When two objects are moving towards each other c) When one object is moving and another at rest d) When both are at rest and start moving together

33. How does rocket move? 34. Exercise: 1, 3, 4, 5

Chapter 5: The turning effect t of force 35. What is meant by the moment of a force? How can it be measured? Name its SI unit. 36. Write down the principle of moment. Describe a simple experiment to verify the POM, making clear

what you measure and how you would use your result to verify your principle. 37. What is meant by centre of gravity (COG)? Outline an experiment to determine the centre of gravity of

an irregular shaped piece of card- board. 38. Explain with the aid of a diagram how you would determine experimentally the distance of the centre

of mass of a metre rule from one end. 39. Define stable, unstable and neutral equilibrium. What are the factors necessary for an object being

stable.

40. Figure shows a uniform metre rule, freely pivoted at a point 20cm from end P

The rule is kept horizontally by means of a 120g mass suspended 5.0cm from end P

i) Write down the size of the vertical force acting 5.0cm from P

ii) Use the principle of moments to help you determine the mass of the metre rule. 41. A non uniform rod is balanced as shown is the diagram. Given that the centre of gravity of mass of the

rod is 14.0 cm from the end marked A, what is the mass of the rod?

42. Following figures shows a plank of mass 5.0 kg and length 3.00m resting horizontally on two trestles,

P and Q, which are a distance of 2.5m apart. When a student of 60.0 kg walks along the plank from one trestle to the other, the plank sags. i) Explain why the sag increases as the student walks towards the middle of the plank.

ii) Calculate the downward forces exerted on each trestle when the student is a distance of 0.5m from trestle P and 1.25m from trestle Q.

43. Discuss qualitatively the effect of the position of the centre of gravity on the stability of a table lamp. 44. Explain why it is possible to balance a metre rule at its midpoint but it is not possible to balance a

billiard cue (tapering wooden rod) at its midpoint. 45. A painter of weigh 1000N stands 1.0m from the left hand end of a uniform plank which is 5.0m long

and weighs 800N. The plank is supported by two trestles each 0.5m from opposite ends. The diagram below shows the two upward forces P and Q acting on the plank due to the trestles.

i) Copy the diagram of the plank and complete it to show any other forces which are acting on it. Name each of the forces. ii) What is the magnitude of the total downward and upward forces? iii) By taking the moments about the left trestle, calculate the upward force exerted on the plank by the other trestle.

46. 12. A painter of weight 330N sets up two trestle and a 4m plank of weight 60N on which to stand while he paints the wall. Trestle A and B are placed 1m from each end of the plank. He sets his can of paint, which weighs 20N, 0.5m from the left hand and gradually works towards the right. How far to the right can he move before the plank just lifts from the trestle. (Ans:0.33m)

Chapter 7: Mains Electricity 47. Define: current, live wire, neutral wire, fuse, earth wire, alternate current, direct current, circuit

breaker, double insulation, switch, 48. Explain the heating effect of current. 49. What is electric power?

50. Define 1 watt. 51. Show the relation between electric power, voltage and current. 52. Mathematical problems related to energy consumption. 53. Exercise Questions: 1, 2, 3

Chapter 8: Electric charge 54. What is static electricity? 55. Write down the uses and problems with static electricity. 56. Show the structure of atom. 57. Why objects become charged when rubbed? 58. How will you use a gold leaf electroscope to identify a body is charged or not? 59. How will you use a gold leaf electroscope to identify a body is +ve or –ve charge? 60. How will you charge an object into +ve and –ve charge by induction process? 61. Discuss the working principle of photocopier. 62. Exercise: 1, 2, 3, 4

Chapter 9: Current and voltage 63. Define: conductor, insulator and semiconductor, current, potential, potential difference 64. Why are metals good conductors? 65. What is charge? 66. What is potential? 67. What is electric circuit? Explain series and parallel circuit. 68. Draw the symbols for switch, bulb, switch, fuse, cell, voltmeter, battery, ammeter, diode, resistor,

thermistor, variable resistor, LDR 69. What is LED? 70. Solve the circuits: as done in the class. 71. Write down the merits and demerits of series and parallel circuits. 72. Exercise Questions: 1, 3, 4

Chapter 10: Electrical Resistance 73. What is resistance? 74. Discuss about different types of resistors and write down their uses – (fixed, variable, thermistor, LDR,

diodes) 75. State Ohm’s law. 76. Set an experiment to describe Ohm’s law. 77. Sketch I– V graph for Ohmic resistance, filament bulb and diode.

Chapter 14: Sound 78. What is sound? How does sound produce? 79. Sound needs medium to travel – show with an experiment. 80. What is echo? What is the minimum time required to hear echo? 81. What is the minimum distance required to hear echo? 82. How will you use echo to determine – depth of a well? 83. Define: reflection and diffraction of sound? What is the condition for diffraction? 84. What is frequency? Write down its unit. 85. Show that v = fλ 86. Show that f = 1/T 87. What is speed of sound? How is it affected? 88. What are audible range, ultrasonic and infrasonic sound? 89. How do bats fly? 90. Exercise: 2, 3, 4

Chapter 15: Energy Transfers 91. Different types of energy 92. Different types of energy conversion 93. State conservation law of energy. For a falling body show that energy is conserved. 94. Solving problems with Sankey diagram from exercise. 95. What is efficiency? Solving problems with efficiency.

Chapter 17: Work and Power 96. Define: work, energy and power and their units. 97. What is gravitational potential energy? Show that GPE = mgh 98. What is kinetic energy? Show that Ek = ½ mv2 99. Show the conversion of GPE and Ek in a graph.

100. Exercise: 1, 2, 3, 5, 6, 8, 9 Chapter 19: density and Pressure

101. Define: density, pressure and their units 102. Set an experiment to determine density of an irregular shape object. 103. Determine pressure in liquids. 104. Show that P = hρg 105. What is barometer? How does it work? 106. What is manometer? How does it work? 107. Exercise: 1, 2, 3

Chapter 20: Solids, Liquids and Gases 108. Compare solid, liquid and gas 109. What is Brownian motion? 110. State Boyle’s law. 111. What is absolute zero temperature? Show in the graph.