The diagram below shows parallel rays striking a convex lens. Study it and answer questions 19 and 20.

19. Complete the diagram to show the path of the rays after passing through the lens.

20. What eye defect does this lens correct?

21. Give the part of an insect that has the same function as the gills of a fish.

22. Apart from the animal kingdom, which other group of organisms make up living things?

23. How can a poultry farmer prevent hens from eating their own eggs?

24. Which property of air enables one to drink water from a bottle using a straw?

25. In which way do bacteria help in soil formation?

26. Indicate on the diagram below the missing part that would improve the movement of air in the house.

27. In which way is a pool of water near a home likely to be a source of malaria to the people in that home?

28. How does a bat differ from all the other mammals?

29. Apart from contracting sexually transmitted diseases, why would you advise a girl who has started menstruating to abstain from sex?

30. Draw an example of a foot of a swimming bird in the space provided below.

31. Why is a splint necessary when giving First Aid to someone with a broken limb?

The diagram below is of a flower. Use it to answer questions 32 to 34.

32. Name the part labelled X

33. What is the use of the part labelled Y to the flower?

34. What does the part labelled Z become after fertilisation?

35. Give any one reason why it is important to weed crops.

36. If a person enters a room and begins smoking, how does that habit affect the health of the people in the room?

37. In which part of the human body are the red blood cells made/

38. What process will you use to recover salt which has dissolved in water?

39. Which instrument is used to measure the temperature of a human body?

40. What first aid would you give to a child who has drunk paraffin?