Q: Q: Fish use some of their fins to propel themselves through the water and others to do what? A:

OPTIONS:
- breathe
- reproduce
- rest
- steer

A: steer

input: OPTIONS:
- enthalpy
- vibration
- volume
- entropy Now, answer this question: Q: Chemical and physical changes in a system may be accompanied by an increase or a decrease in the disorder of the system, corresponding to an increase or decrease in what? A:
A:
output: entropy

Q: The mean free path for a gaseous molecule will be hundreds of times the what of the molecule? A:

OPTIONS:
- variation
- weight
- density
- diameter

Answer: diameter

Problem: OPTIONS:
- 3
- 2
- 7
- zero
Q: Q: In their pure form, all elements have an oxidation number of what? A:
Answer: zero

Problem:OPTIONS:
- carbon dioxide
- air
- plasma
- water

Q: Steam consists of what common and essential element in its gaseous phase? A:
****
A: water

Problem:OPTIONS:
- off effect
- newton effect
- show effect
- hall effect

Q: The creation of a voltage across a current-carrying conductor by a magnetic field is known as what? A:
****
A:
hall effect