Q: What term refers to the friction of fluid, within itself and its surroundings? Choices: - elasticity - volume - salinity - viscosity A:
viscosity

Q: How are protozoa that cause giardiasis spread? Choices: - insects - starch and water - lakes and rivers - food and water A:
food and water

Q: Q: What celestial bodies are classified by color and temperature, ranging from blue to red and hottest to coolest? Choices: - astroids - planets - galaxies - stars A:
A: stars

Question: Q: Approximately how many galaxies are there in the universe? Choices: - an infinite number - a trillion - an octillion - about a hundred billion A:
Answer: about a hundred billion

*Question*
Q: The greenhouse effect on earth is caused by an increase in what in the atmosphere? Choices: - phosphorous - vapor - satellites - carbon A:
**Answer**
carbon

(Q).
Q: What type of muscle is found in the walls of other internal organs such as the stomach? Choices: - Fiber Muscle - inorganic muscle - Tube Muscle - smooth muscle A:
(A).
smooth muscle