Q: Covering about 16 percent of the moon's surface, maria are dark, solid, flat areas consisting of what substance? A:

OPTIONS:
- debris
- ash
- dust
- lava

Answer: lava

Q: Pressure relationships inspiration (or inhalation) and expiration (or exhalation) are dependent on the differences in pressure between the atmosphere and these? A:

OPTIONS:
- salts
- enzymes
- bones
- lungs

Answer: lungs

Q: Temperature and pressure affect changes in phases or states of what? A:

OPTIONS:
- homeostasis
- decay
- energy
- matter

Answer: matter

Q: What is the source of most electricity? A:

OPTIONS:
- methane
- the Sun
- air
- coal

Answer:
coal