*Question*
Q: Energy comes in discrete packages called what? Choices: - quasar - quota - quasi - quanta A:
**Answer**
quanta

*Question*
Q: Over time, deposited sediments may harden into what? Choices: - coral - fossils - deltas - rocks A:
**Answer**
rocks

*Question*
Q: What process is the opposite of nitrogen fixation? Choices: - digestion - respiration - percolation - denitrification A:
**Answer**
denitrification

*Question*
Q: Group 15 of the periodic table is also called which group? Choices: - oxygen - potassium - hydrogen - nitrogen A:
**Answer**
nitrogen