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- 1. Multiple ChoiceWhen a species becomes extinct ____________.there is a chance the species will come back eventuallythe species adapts to a new situationit completely destroys the ecosystemno young of that species can be produced
- 2. Multiple ChoiceWhat could be happening if a macroinvertebrate no longer lives in a stream?The water quality is improving.The water quality is unchanged.The water quality is decreasing.There is no connection between water quality and macroinvertebrates.
- 3. Multiple ChoiceIn the 21st century, extinction is a big problem because _____________________the rate of extinction is much faster than ever beforethere is no such thing as extinction in the 21st centurynow we can record when it happensthe rate of extinction is much slower than ever before
- 4. Multiple ChoiceWhat happens when an ecosystem becomes less biodiverse?The health of the ecosystem increases.The health of the ecosystem decreases.The health of the ecosystem remains the same.The ecosystem cannot survive.
- 5. Multiple ChoiceWhat is the relationship between temperature and dissolved oxygen?Cold water holds less dissolved oxygen.Cold water holds more dissolved oxygen.Warm water holds more dissolved oxygen.There is no relationship between temperature and dissolved oxygen.
- 6. Multiple ChoiceAnimal waste runoff is an example of which of the following?point source pollutionnonpoint source pollutionwidespread air pollutionwidespread hazardous waste pollution
- 7. Multiple ChoiceDifferent organisms have different roles within a habitat. The role an organism plays in its habitat is its __________________.populationcommunityecosystemniche
- 8. Multiple ChoiceWhat is it called when a scientist can determine the exact place that is the source of a pollutant?point source pollutionnon-point source pollutionwidespread pollutionless hazardous pollution
- 9. Multiple ChoiceWhat is a wetland?all of the land area surrounding a river systemthe area at a river's mouth where fresh water meets salt watera low-lying area that is saturated with wateran area on the side of a river that floods periodically
- 10. Multiple ChoiceThe term applied to a species that has no living members is _______________.endangeredthreatenedextincttroubled
- 11. Multiple ChoiceWhat part of a river system has salty water?estuaryflood plaintributarieswatershed
- 12. Multiple ChoiceWhich process occurs when the water in a river slows?erosioncondensationweatheringdeposition
- 13. Multiple ChoiceA symbiotic relationship in which an organism benefits and the other is not affected is known asmutualismparasitismcommensalismfriendshipism
- 14. Multiple ChoiceExtinction contributes to a decrease in biodiversity.TrueFalse
- 15. Multiple ChoiceWatershed is the name of the land area that drains into a river system.TrueFalse
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