Q: The kidneys are a pair of bean-shaped structures that are located just below and posterior to the liver in this? Choices: - stomach cavity - cerebral cavity - mantle cavity - peritoneal cavity A:
peritoneal cavity

Q: What conveys signals received by the eye to the brain? Choices: - motor nerve - sciatic nerve - sensory nerve - optic nerve A:
optic nerve

Q: Q: What is the theoretical event that began the universe often called? Choices: - Coreolis effect - dark matter - string theory - big bang A:
A: big bang

Question: Q: What is the term for the process in which water vapor changes to tiny droplets of liquid water? Choices: - dispersion - vaporization - diffusion - condensation A:
Answer: condensation

*Question*
Q: What is the approximate population on the earth? Choices: - 9 trillion - 7.3 billion - 41 billion - 7 billion A:
**Answer**
7 billion

Q: Q: What is formed when nitrogen and sulfur oxides dissolve in rain? Choices: - toxic rain - ozone - hail - acid rain A:
A: acid rain