Problem: OPTIONS:
- pion
- dark matter
- molecules
- quarks
Q: Q: Strangeness, charm, bottomness, and topness are properties of what subatomic particle? A:
Answer: quarks

Problem:OPTIONS:
- methane
- carbon monoxide
- phosphorous
- water vapor

Q: The combustion of propane gas produces carbon dioxide and what else? A:
****
A: water vapor

Q: What instrument, with a digital readout, is used by scientists to measure very small masses? A:
OPTIONS:
- mixed balance
- mechanical balance
- common balance
- electronic balance
electronic balance

Q: How is communication initiated and maintained with spacecraft? A:
OPTIONS:
- sonar
- telegraph
- wi-fi
- radio waves

Answer: radio waves

Question: Q: The energy a chemical reaction needs to get started is called what kind of energy? A:
OPTIONS:
- function
- conduction
- fusion
- activation
Answer: activation

input: OPTIONS:
- enzymes
- axons
- receptors
- neurotransmitters Now, answer this question: Q: Like a runner passing a baton, the transmission of nerve impulses between neurons depends on what? A:
A:
output:
neurotransmitters