Senior High Integrated Science – Pub

1 (a) (i) Explain the term mulching. (ii) Give two advantages of mulching. 1 (b) (i) Draw and label a diagram of a hydrometer. (ii) Describe briefly how the density of a liquid is determined with a hydrometer. 1 (c) Explain each of the following terms: (i) Mass number (ii) Relative atomic mass 1 (d) […]

31. To increase the stability of a body, the A. body must be made heavier B. height and base length of the body must be increased C. base length must be increased D. height of the body must reduced and the base length increased D 32. The ability of the human body to resist infection

1. Biological control of malaria involves A. draining breeding grounds of mosquitoes B. spraying surfaces on which mosquitoes settle with insecticides C. introducing fish into ponds to feed on larvae of mosquitoes D. burying empty cans 2. A feeding association in which one partner benefits while the other loses is called A. commercialism B. mutualism