Here are the answers to the questions: 29. a. Give any two risky situations related to sexually transmitted disease. Unprotected sexual intercourse (without condoms). Sharing contaminated needles for drug use, tattooing, or piercing. 29. b. Give any effect of HIV and AIDS on each of the following: i. Family Loss of income due to illness or death of a family member. Increased financial burden from medical expenses and caregiving. ii. Nation Reduced workforce and productivity due to illness and death of skilled personnel. Increased strain on healthcare systems and national budgets. 30. Figure 10 shows common laboratory apparatus. a. Name the above apparatus X: Thermometer Y: Beam balance b. What does each of the apparatus measure? X (Thermometer): Measures temperature. Y (Beam balance): Measures mass.