SECTION B
Questions 41 to 55 carry four marks each.
41. The diagram below shows a human joint. Use it to answer questions that follow.
a) Name the parts marked with letters Y and Z.
b) Give any one function of the fluid found in the place marked with letter X.
c) What type of joint is shown in the diagram above?
42. An experiment was done by a P7 class as shown in the diagram below. Use it to answer the questions that follow.
a) When is such a method of finding volume used?
b) If the object above has density of 2g/cm3, Find mass.
43. a) Give any two characteristics that are common to a frog and a crocodile apart from being vertebrates.
c) How is fertilization of a frog different from that of a crocodile?
d) Name any one other vertebrate that can be classified with a frog.
44. The diagram below shows a saucepan with some water on fire. Use it to answer the questions that follow
a) How will heat from the fire move to reach the water at the bottom of the saucepan?
b) Which method will enable the heat to reach all the water in the saucepan?
c) Use arrows to show the movement of water in the saucepan after it has been heated for sometime.
d) What will happen to the water in the saucepan to show that it is boiling?
45. The diagram below is of a fish. Use it and answer the questions that follow.
a) Name the structure marked L.
b) What is the function of each of the structures marked D and N?
c) State the function of the structure covered by the art marked O.
46. The diagram below shows a seedling in a box. Study it and answer the questions that follow.
a) What colour will the leaves of the seedling be if left in this box with H covered for a week?
b) Give a reason for your answer in (a) above.
c) Give any two things that are likely to happen to the seedling if the part marked with letter H is left open.
47. a) Give any one reason why a magnet cannot attract pieces of wood.
b) Give any three practices that can lead to the destruction of a magnet.
48. Kamoga is a poultry farmer. He has 100 layers on his farm. Give any four reasons why he should keep farm records.
49. a) Why is it bad practice to apply soil or cow dung on any burnt area of our skin?
b) Suggest any two reasons why the injured part with a burn or scald is dipped into cold water.
c) Give any one way of avoiding burns while lifting hot objects.
50. The diagram numbered 1 and 2 below show an experiment done by a p7 class. Diagram 1 shows a burning candle in an open jar. In digram 2, the jar was covered as shown. Use the diagrams to answer the questions that follow.
a) What would happen to the flame in diagram 2 if the cover was removed after a short time?
b) Give a reason for your answer in question (a) above.
c) If the cover had been left on the jar in diagram 2 for a long time, what would have happened to the flame?
d) Give a reason for your answer in question (c) above.
51. a)What is environmental degradation?
b) Give any three natural causes of environment al degradation.
52. a) Give any two ways in which mulching is important to the soil.
b) Suggest any two materials that are commonly used for mulching gardens.
53. a) State any one function of each of the following parts in a simple electric circuit.
i) Wire
ii) Battery.
b) Mention any two causes of a short circuit.
54. The diagram below shows a machine used for lifting loads. Use it to answer questions that follow.
a) What distance is the load to be lifted?
b) Give the advantage of lifting the load along side CA.
c) Find the mechanical advantage of the machine above.
d) How can the machine be improved so that less effort is used to lift loads?
55. The diagram below is of a Ventilated improved Pit (VIP) latrine. Use it to answer questions that follow.
a) Name the parts marked M and N
b) Give the function of the part marked M
c) What do the arrows in the diagram show?