Q: When what element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air? Choices: - oxygen - mercury - neon - phosphorus A:
phosphorus

Q: What are the large segments of the earth's crust that ordinarily move very slowly? Choices: - ocean plates - lava plates - distinct plates - tectonic plates A:
tectonic plates

Q: Q: What ensures that seeds germinate only when conditions for seedling survival are optimal? Choices: - germination dormancy - seed forcing - survival dormancy - seed dormancy A:
A: seed dormancy

Question: Q: Of all the mineral nutrients, what contributes the most to plant growth and crop yields? Choices: - oxygen - methane - silicon - nitrogen A:
Answer: nitrogen

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

Q: Corals build hard exoskeletons that grow to become what? Choices: - algae - stability reefs - fungi - coral reefs A:
coral reefs