Problem:OPTIONS:
- meteor shower
- Coriolis effect
- aurora nervosa
- northern lights

Q: What colorful phenomenon occurs in the northern sky when particles from the sun energize ions in the thermosphere? A:
****
A: northern lights

Q: What is defined as male gametes that form in the testes and mature in the epididymis? A:
OPTIONS:
- plasma
- mucus
- stereocilia
- sperm
sperm

Q: Acids can also react with metals, and when they do they produce what? A:
OPTIONS:
- alloys
- potassium gas
- rust
- hydrogen gas

Answer: hydrogen gas

Question: Q: Where are protons and neutrons located? A:
OPTIONS:
- outside the nucleus
- secondary nucleus
- orbitals
- central nucleus
Answer: central nucleus

input with options: Q: Regulatory proteins bind to regulatory elements to control what? A:
OPTIONS:
- mutation
- differentiation
- growth
- transcription
output: transcription

Problem: OPTIONS:
- water quality
- all of the above
- natural events
- human activity
Q: Q: What has a bigger impact on water quality, natural events or human activity? A:
Answer:
human activity