(a)A piece of raw meat was left in an uncovered bowl for seven days. Use the information to answer questions 3(a) and 3(b).

 (i) State four likely changes that would be observed in the meat.

(ii) Name the biological process that led to the changes that are observed in the meat.

(iii)On the table below, list four methods of preserving meat to prevent it from the changes stated in 3a(i) and mention the principle involved in the methods.

Four methods of preserving the meat	One principle involved in the preservation method

(iv)Name two environmental factors that may be responsible for the changes in 3a(i)

(b) Name one method of preserving the following food items:

(i) dried maize grains; (ii) fresh tomatoes; (iii) vegetables; (iv) beans; (v) milk