26. At what time of the day are shadows shortest?

27. Why do tyres of cars wear out more quickly on tarmac roads than murram roads?

28. Give any one other system of poultry farming, apart from a free-range system.

29. In which class of animals do you put a tortoise and a lizard?

30. Our school pit latrine smells a lot and is always full of flies. What measure can we take t prevent this situation?

Susan shouted loudly in a big house. As she shouted, she hear another similar sound.

Answer the questions 31 and 31 using this information.

31. Give the name of the similar sound Susan heard after shouting.

32. How was the sound you have named in question 31 formed?

33. Give any one other factor to be considered when choosing a site to build a house, apart from security, raised land, nearness to the main road and availability of water.

34. Give any one state of matter.

35. Why is transpiration important in green plants?

36. State any one effect of air pollution on people.

37. In the diagram below, a candle was burning as shown in A, then it was covered with a tin as shown in B. After sometime the candle stopped burning. Use the diagram to answer the question below:

Why did the candle flame B go off after sometime?

38. Give any one function of a spinal cord in a human body.

39. What type of energy do you have when you are seated in the class?

40. Suggest one reason why an individual should promote personal hygiene?