Q: What are hot fragments of rock called? A:
OPTIONS:
- obsidian
- magma
- shards
- pyroclasts

Answer: pyroclasts

Q: When water particles become hot enough to overcome the force of attraction between them, what happens to the water? A:
OPTIONS:
- it freezes
- it pools
- it evaporates
- it boils

Answer: it boils

Q: What is the measure of the energy released when an extra electron is added to an atom? A:
OPTIONS:
- mass affinity
- neutron affinity
- volume affinity
- electron affinity

Answer:
electron affinity