Q: During what period on earth was coal formed? Choices: - Mesozoic - Neoproterozoic - Neoproterozoic era - the carboniferous period A:
the carboniferous period

Q: If the temperature of a gas sample is decreased, what happens to the volume? Choices: - increases - stays the same - expands - decreases A:
decreases

Q: Q: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose? Choices: - salty - bitter - sour - sweet A:
A: sweet

Question: Q: Natural gas burns cleaner and produces less carbon dioxide than fuels of what type? Choices: - renewable fuels - solar energy - biofuels - fossil fuels A:
Answer: fossil fuels

*Question*
Q: Body waves travel through the earth and arrive at seismograms before what? Choices: - sound waves - velocity waves - function waves - surface waves A:
**Answer**
surface waves

(Q).
Q: In the stomach, which material's arrival triggers churning and the release of gastric juices? Choices: - hair - bile - acid - food A:
(A).
food