Q: A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade? Choices: - volcano fall - volcanic summer - volcano spring - volcanic winter A:
volcanic winter

Q: What triangular feature is formed when a river empties into a large body of still water? Choices: - flow - confluence - region - delta A:
delta

Q: Q: What produces almost one-half of the earth's oxygen through photosynthesis? Choices: - prokaryotes - algae - arthropods - protists A:
A: protists

Question: Q: Another unit of energy, used widely in the health professions and everyday life, is _______? Choices: - carbs - body index - biomass ( cal ) - calorie ( cal ) A:
Answer: calorie ( cal )

*Question*
Q: What are all of the digits that can be known with certainty in a measurement plus an estimatied last digit called? Choices: - determined figures - important figures - miniature figures - significant figures A:
**Answer**
significant figures

Q: What process involves the flow of heat from warmer objects to cooler objects? Choices: - activation - convection - radiation - conduction A:
conduction