Q: Lava flows from a volcano and hardens into what? Choices: - life - snow - sand - rock A:
rock

Q: What is the most common type of organic compound? Choices: - proteins - fats - vitamins - carbohydrates A:
carbohydrates

Q: What is the major cause of chronic respiratory disease as well as cardiovascular disease and cancer? Choices: - drinking - exercise - diet - smoking A:
smoking