Q: What disease associated with smoking involves breakdown of walls of the alveoli, resulting in less gas exchange by the lungs? A:

OPTIONS:
- leukemia
- cancer
- pneumonia
- emphysema

Answer: emphysema

Problem: OPTIONS:
- outer electrons
- organism electrons
- helium electrons
- valence electrons
Q: Q: What are the outer-shell electrons of an atom called? A:
Answer: valence electrons

Problem:OPTIONS:
- igneous
- limestone
- crystalline
- sedimentary

Q: What type of rocks are very useful for determining the deformation history of an area? A:
****
A: sedimentary

Q: Oils are liquid lipids that plants use for storage of what? A:
OPTIONS:
- fat
- glucose
- oxygen
- energy
energy

Q: Crude oil is a mixture of different types of what? A:
OPTIONS:
- contaminants
- fats
- greenhouse gases
- hydrocarbons

Answer: hydrocarbons

input with options: Q: What is the time interval required for one complete wave to pass a point called? A:
OPTIONS:
- cycle
- minute
- half-life
- period
output:
period