1. Which produces more radioactivity in the atmosphere— coal-fired power plants or nuclear power plants? 2. Is radioactivity on Earth something relatively new? Defend your answer. 3. What happens to a...

1. Which produces more radioactivity in the atmosphere— coal-fired power plants or nuclear power plants?

2. Is radioactivity on Earth something relatively new? Defend your answer.

3. What happens to a nitrogen atom in the atmosphere that captures a neutron?