Q: Q: Giardiasis and malaria are diseases caused by what organism? A:

OPTIONS:
- worms
- larvae
- bacteria
- protozoa

A: protozoa

Q: Q: Clouds are formed from what? A:

OPTIONS:
- ice crystals
- snow flakes
- dust particles
- water droplets

A: water droplets

Q: Q: Blood calcium levels are tightly regulated by the what system? A:

OPTIONS:
- digestive
- cardiovascular
- nervous
- endocrine

A: endocrine

Q: Q: How does the liquid in a thermometer respond to heat or cold? A:

OPTIONS:
- freezes or boils
- disappears
- rises or vaporizes
- expands or contracts

A:
expands or contracts