Fact 1: Pneumonia may be caused by an infection or injury of the lungs. Fact 2: Viral pneumonia is usually milder than bacterial pneumonia. Given the two facts above, viral and what disease can both be caused by injury of the lungs?
OPTIONS:
- tongue
- the skin
- bacterial
- throat
- Pollution
- fungi
- smoking
- ribs

Answer: bacterial

Fact 1: Air pollution harms the respiratory and circulatory systems. Fact 2: Air pollution, or smog, is caused by cars and trucks. Given the two facts above, what harms the respiratory system?
OPTIONS:
- coal
- oxygen
- tar
- cigars
- breathing
- silence
- sulfur
- cars

Answer: cars

Fact 1: Viruses infect and live inside the cells of living organisms. Fact 2: Yeast is a living organism. Given the two facts above, what can infect and live inside the cells of yeast?
OPTIONS:
- fungi
- q
- parasites
- PDAs
- rocks
- plants
- viruses
- bacteria

Answer:
viruses