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- 1. Multiple Choice
Of all the freshwater on Earth, what percent of it is actually accessible to us on the surface?less than one percentabout three percentabout thirty percentabout fifty percent - 2. Multiple ChoiceA group of parts that work together as a whole is called _____conservationa zonea nichea system
- 3. Multiple ChoiceProbably the biggest thing that humans do that negatively affects the hydrosphere is _____overharvestingpollutingbuilding damsremoving dams
- 4. Multiple ChoiceWhen people use more freshwater than can be replaced it's called _____overharvestingfarmingdistributingfertilizing
- 5. Multiple ChoiceWhen people put sewage or other waste in the water it's called _____overharvestingfarmingpollutingdam building
- 6. Multiple ChoiceA barrier built to collect or redirect water is called a _____dambridgetunnelwaterway
- 7. Multiple ChoiceProtecting things found in nature is called _____pollutionconservationoverharvestingsquandering
- 8. Multiple ChoiceThe Elwha River is located in _____Olympic National Park in Washington StateYellowstone National Park in WyomingGrand Canyon National Park in ArizonaYosemite National Park in California
- 9. Multiple ChoiceWhat was built, nearly 100 years ago, that brought a lot of problems to the Elwha River?a massive factorya long bridgea large highwaya giant dam
- 10. Multiple ChoiceThe Elwha River is home to all 5 species of native _____Atlantic tunaPacific tunaPacific salmonAtlantic salmon
- 11. Multiple ChoiceBecause the water around the Elwha dam stayed in one place _____the water got coolerthe water got warmerthe water got dirtierthe water got cleaner
- 12. Multiple ChoiceMost fish prefer to lay their eggs in _____cold waterwarm waterhot watermineral water
- 13. Multiple ChoiceWarm water breeds _____fishphytoplanktonparasitessalmon
- 14. Multiple ChoiceIn 2011, some local people decided it was time for _____the dam to be wideneda new dam to be builta tunnel to be dugthe dam to come down
- 15. Multiple ChoiceSince 1999, how many dams have been torn down across the United States?about 4 damsabout 43 damsabout 430 damsabout 4300 dams
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